Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e145f91722219b8…

MALICIOUS

PDF

96.5 KB Created: 2021-06-10 23:45:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: db010efdcd0f2297c7b046136e90b2a2 SHA-1: 6a606831e7c4ee20cebafd5eaef67e2a22459910 SHA-256: 8e145f91722219b804c98a8f44f946e381e17631dc0884896beaa5ebbc422a30
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document is detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains numerous links pointing to compromised WordPress sites, likely serving as a link farm to distribute malicious files. The document's content is crafted to appear as a search result for a specific document, aiming to trick users into downloading a malicious file disguised as the requested content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • 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://cructi.ru/uplcv?utm_term=saudi+aramco+operational+calendar+2020+pdf+download PDF link annotation
    • http://www.realisthotel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099a6e6aec52---68516589804.pdfIn PDF document text
    • https://balance-global.com/wp-content/plugins/super-forms/uploads/php/files/18e7kmp8qujncgi0qu86c9lkrv/51171236781.pdfIn PDF document text
    • http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a95d6971b33---kevikebesawodevilomavit.pdfIn PDF document text
    • https://www.tai.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1606cb34773fe9---59412869191.pdfIn PDF document text
    • https://bettenbaehren.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608c11b7d0aa1---37625865483.pdfIn PDF document text
    • https://agrilaui.com/userfiles/file/rinejoxim.pdfIn PDF document text
    • https://santevita-bg.com/ckfinder/userfiles/files/52497683757.pdfIn PDF document text
    • https://www.brightfieldbusinesshub.co.uk/wp-content/plugins/super-forms/uploads/php/files/lbjt1m0h64jq0e3lj69oudcd7g/valimafegalek.pdfIn PDF document text
    • http://bpsstudio.hu/uploads/nejujowogazuwiwami.pdfIn PDF document text
    • https://metroguards.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608a47ccadb9a---65604668016.pdfIn PDF document text
    • https://dentinale.eu/wp-content/plugins/super-forms/uploads/php/files/dd166e2cfcda5739b528e52446b11434/8399286248.pdfIn PDF document text
    • http://www.grupohk.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a6b12e38fcb---jokesimuwanipag.pdfIn PDF document text
    • http://armanetti.com/images/palaxerogasuseramidu.pdfIn PDF document text
    • https://lightsourceindiana.com/wp-content/plugins/super-forms/uploads/php/files/1a6fdfe29270b22b82ee1c45c5b73dc0/pigosu.pdfIn PDF document text
    • http://moreit.ch/productinfo/file/xisofeg.pdfIn PDF document text
    • https://canadiancontractorservices.com/wp-content/plugins/super-forms/uploads/php/files/48vsgdrqtdpff71c56t16mqsj5/90044623962.pdfIn PDF document text
    • https://www.accidentinjuryalbuquerque.com/wp-content/plugins/super-forms/uploads/php/files/mhdt1qi3v6vhtupkaepaddvm02/82420585599.pdfIn PDF document text
    • http://swaminarayangm.org/userfiles/file/13156068634.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://scripts.sil.org/OFLIn 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_off00011b3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B3A 5592 bytes
SHA-256: 8c1e1111def430a11f7ff9f932fd59172df5a8e9ba7974090aef7b7699a0a7db
font_01_sfnt_off00012e46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E46 11568 bytes
SHA-256: 31149998b876107cf4ce2dca2401a732fc1c5cca74dc3442f9a8f1f6a9c08cc4
font_02_sfnt_off000155f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x155F8 18760 bytes
SHA-256: 6c262387c379251f7e997322156b3ef5d9ad177e774ffd05e09e43822cc343eb

Open this report in the interactive analyzer, or submit your own file for analysis.