Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6117a27a32ea93c…

MALICIOUS

PDF

103.6 KB Created: 2021-07-02 14:36:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 5adf2516758f11f4c6936c8ede57bc79 SHA-1: 160ec0cc98afd43c15d15b5d249b8d59a1517ab9 SHA-256: c6117a27a32ea93c7f29b30c682d3b665a9c046e6bbe9945ec0501f1a6a161d9
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document contains numerous embedded URLs pointing to compromised websites and link farms, suggesting it's designed to redirect users to malicious content or phishing sites. The presence of PDF_URI and PDF_SEO_DISPOSABLE_LINK_FARM heuristics further supports this, indicating a pattern of using compromised hosting for link distribution. No scripts were extracted, but the overall structure and URL patterns are consistent with a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9874

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) or Microsoft license-boilerplate documents that carry no urgency or charge/dispute escalation.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://crewmak.ru/uplcv?utm_term=operations+management+heizer+10th+edition+solutions+manual+free PDF link annotation
    • http://www.restorationservice.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160bafebf8f647---94364287460.pdfIn PDF document text
    • http://lbs.ac.at/wp-content/plugins/super-forms/uploads/php/files/22klr6m0pmdi8va3hh9o819r48/beritogizulesor.pdfIn PDF document text
    • http://alexanderkanevskyartgallery.com/clientMedia/file/25705174095.pdfIn PDF document text
    • http://thedreams.cz/files/favewimevuzodirow.pdfIn PDF document text
    • http://localhomesales.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160d614994c4c8---61386205845.pdfIn PDF document text
    • http://theettiaresottawa.com/clients/e/e8/e8f54e69a7463df9fd0adff13cd8e90f/File/52460772154.pdfIn PDF document text
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/fef619be210c56d5aaf50e1221e5c1d8/72683327665.pdfIn PDF document text
    • https://beautifullifeuk.com/wp-content/plugins/super-forms/uploads/php/files/83779bfa2909351318006c2ebf3d008a/xudiw.pdfIn PDF document text
    • http://counterreaction.net/wp-content/plugins/formcraft/file-upload/server/content/files/160d649c623390---54451148580.pdfIn PDF document text
    • http://cbelmira.com/wp-content/plugins/super-forms/uploads/php/files/qkqgbq1pvc5nipq40cjacqcm24/nenum.pdfIn PDF document text
    • https://aedwea.com/upload/foto/93475036608.pdfIn PDF document text
    • http://svs-pm.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d2a844481a8---xobed.pdfIn PDF document text
    • http://oneself.pro/wp-content/plugins/formcraft/file-upload/server/content/files/160750da417efc---zakamu.pdfIn PDF document text
    • https://teplitsyoptom.ru/wp-content/plugins/super-forms/uploads/php/files/4226940da253fef9f500d0766bad3567/bazulalebegedalinuj.pdfIn PDF document text
    • https://alsterparkett.de/wp-content/plugins/super-forms/uploads/php/files/tpa533adpf9vgqmbjqtfh6qf69/9728946281.pdfIn PDF document text
    • http://contelex.it/userfiles/files/64637585497.pdfIn PDF document text
    • http://ghhs1968.com/clients/5/57/5762190d0a265df614d1f295a7060a42/File/54195500571.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a65fed76981---61574060243.pdfIn PDF document text
    • http://www.peretprod.ro/content-images/file/nizutuzijunasoxow.pdfIn PDF document text
    • https://best-turbos.com/wp-content/plugins/super-forms/uploads/php/files/d6bb041495208db4790fac8831fc3f7d/63865848441.pdfIn PDF document text
    • https://2greenchicks.com/wp-content/plugins/super-forms/uploads/php/files/0f864f000f28c56005903371a61b51f9/zasixabenezedimibuzusi.pdfIn PDF document text
    • http://mfplus.ba/wp-content/plugins/formcraft/file-upload/server/content/files/160d6395f2b0e3---18975141978.pdfIn PDF document text
    • https://acethamessecurity.co.uk/wp-content/plugins/super-forms/uploads/php/files/a8b5a4c280a9a80161c71a399f98a5dc/63520131627.pdfIn PDF document text
    • http://mai-colle.jp/userfiles/file/43564062602.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00014477.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x14477 18380 bytes
SHA-256: 9f5459401fad43f7b99df99a0400d9414b40d252d4edd9741108d4a8c8cabea7
font_00_sfnt_off00011230.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11230 11304 bytes
SHA-256: 89b2ea54c4409027959c5b0f552da35bf05be6fbef59492d2729ca1e898bf843
font_01_sfnt_off00012c66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C66 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off00016125.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16125 17860 bytes
SHA-256: 871320f051c1d0091dc643655e241f68525735a0fe02dd4894573ac4aa28565b

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