Malicious PDF — malware analysis report

Static analysis result for SHA-256 195e5054d3fd6998…

MALICIOUS

PDF

75.8 KB Created: 2021-07-10 09:30:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: 17a9eb02b2254de8e06f88d326a442ea SHA-1: ad3f54541ee40b73f6ccf53b37d185aba5e8d757 SHA-256: 195e5054d3fd6998d2dfc89ad11979c07ca3ff09b2096b8b7c46810f757f71da
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document is identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, directing users to multiple compromised websites hosted on disposable domains, likely for credential harvesting or malware distribution. The document body is heavily obfuscated and unreadable, but the presence of numerous external URIs and the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic strongly suggest a malicious intent to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://allytemp.ru/uplcv?utm_term=quadratic+equation+extracting+square+roots+examples PDF link annotation
    • https://www.advids.co/wp-content/plugins/formcraft/file-upload/server/content/files/160c389ba1c2d2---kaxopuw.pdfIn PDF document text
    • http://www.putnamtaxi.net/wp-content/plugins/formcraft/file-upload/server/content/files/160791076d462d---86673327242.pdfIn PDF document text
    • http://aodaiminhhanh.com/app/webroot/uploads/files/nikuxi.pdfIn PDF document text
    • https://teenvolunteerdallas.org/wp-content/plugins/super-forms/uploads/php/files/a9bec24fb9c4d0039e9e2492c4462184/bejudatijaxaduxaze.pdfIn PDF document text
    • http://driver-jazda.pl/upload/file/gimufurogujaratokun.pdfIn PDF document text
    • http://topopentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160822eb69a695---64730497658.pdfIn PDF document text
    • http://europeanprofservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160845dc91ddc5---38453102874.pdfIn PDF document text
    • https://nanyangtextile.com/userfiles/file/14079754607.pdfIn PDF document text
    • http://htwy.com/upload/file/nafezan.pdfIn PDF document text
    • http://alexanderkanevskyartistbiography.com/clientMedia/file/68327382572.pdfIn PDF document text
    • https://maydongy.com/wp-content/plugins/super-forms/uploads/php/files/4vdh132b85hv999bk3fl2tspo3/93517793653.pdfIn PDF document text
    • https://ecobox.eng.br/wp-content/plugins/super-forms/uploads/php/files/ola2mcps2nd8f8eu0m60pcmn4t/lefopuw.pdfIn PDF document text
    • http://phongkhamthienhoa.org/images/files/1942754999.pdfIn PDF document text
    • https://0900107678.com/upload/file/16419720487.pdfIn PDF document text
    • https://anjingliar.com/contents//files/devita.pdfIn PDF document text
    • https://gpagroup.in/wp-content/plugins/formcraft/file-upload/server/content/files/1607eb3bd04e8d---65160493270.pdfIn PDF document text
    • https://12shio2.com/contents//files/20901462833.pdfIn PDF document text
    • http://prime-standard.com/piceditor/file/77709014594.pdfIn PDF document text
    • http://www.stratcareerservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c9f520ccc1---jinizeloko.pdfIn PDF document text
    • http://adhdesign.de/userContent/files/20210706174758-duwunuvelokutuv.pdfIn PDF document text
    • https://autoparkalbanese.it/file/62470005121.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a2952d3314b---gamazawa.pdfIn PDF document text
    • http://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077354f3af92---93366128503.pdfIn PDF document text
    • https://noddy.nu/images/file/dulize.pdfIn PDF document text
    • http://lungtransplantopen.com/clients/d/de/de7cc03d42bda6b8b84c8ac9728529bb/File/vifetabipul.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c4c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4C2 16420 bytes
SHA-256: 7cb6f151752f389d266f244040808bb4e752c3f10118bd04ced64231f3166b0b
font_01_sfnt_off0000ef6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF6A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010781.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10781 11264 bytes
SHA-256: ef97aec06dde87ce8ba5e846edc08498211f61843f0eb721200a9da4b9a9eef7

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