Malicious PDF — malware analysis report

Static analysis result for SHA-256 c29ea39f3ef4663d…

MALICIOUS

PDF

82.5 KB Created: 2021-07-08 12:55:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 8ab1526582335c7301af34275ff8a9bb SHA-1: 8c1a1ec9b2eda110e9094ab905d91738ef380716 SHA-256: c29ea39f3ef4663dfbc049369149237019645d6004dffcfd522c963a9e4b7b01
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The document functions as a link farm, with numerous embedded URLs pointing to compromised WordPress sites, suggesting a phishing or malware distribution scheme. The use of 'utm_term' parameters in some URLs indicates tracking, common in phishing campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://crewmak.ru/uplcv?utm_term=poem+i+cannot+go+to+school+today PDF link annotation
    • http://www.viksexteriors.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc95d256fe---89233977374.pdfIn PDF document text
    • http://mountmedpharmacy.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1608a3fbdf3051---50390857420.pdfIn PDF document text
    • http://triumphtoday.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b37c085eed3---28455109841.pdfIn PDF document text
    • http://leap-egypt.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6132c36c57---59885849585.pdfIn PDF document text
    • https://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a674582bb91---nuwabimixekube.pdfIn PDF document text
    • http://akcjonariusz.com/UserFiles/file/86949666741.pdfIn PDF document text
    • http://nextgt.eu/uploads/file/xurawufelapofi.pdfIn PDF document text
    • http://fygl.net/uploads/file/27165854846.pdfIn PDF document text
    • http://goodmix-psc.com/userfiles/files/tevadoki.pdfIn PDF document text
    • http://laptopplus.be/app/webroot/files/userfiles/files/29293500573.pdfIn PDF document text
    • http://kssi.ir/public/userfiles/file/zokezomabo.pdfIn PDF document text
    • http://thm-holding.ru/wp-content/plugins/super-forms/uploads/php/files/b656326f3ddf3ccf21bebb97b867bd5f/21995761872.pdfIn PDF document text
    • https://minipowerpack.net/upload/files/34758527091.pdfIn PDF document text
    • https://www.mercato.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1609c7f3a73ed4---33126336297.pdfIn PDF document text
    • https://naseeha.org/wp-content/plugins/super-forms/uploads/php/files/899c5cfafed07ea07f879428b29124b8/90702980288.pdfIn PDF document text
    • http://www.deep2001.com/images/library/File/85173887719.pdfIn PDF document text
    • http://alexlunacoach.com/img/editor/file/93363210593.pdfIn PDF document text
    • http://stsaischoolamritsar.com/slbdavbatala/userfiles/file/51039364215.pdfIn PDF document text
    • http://deltastal.ru/userfiles/file/bukux.pdfIn PDF document text
    • http://angeladaniel.eu/uploads/files/71885503490.pdfIn PDF document text
    • https://www.mercedesbenzofaustinservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160865cb042bfc---42820552905.pdfIn PDF document text
    • http://zonazero.es/userfiles/file/79271463008.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dee9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEE9 10832 bytes
SHA-256: 9a979f3d8de7461dfc7ebb602adc9e0aa09c1f11969687b87fce1b8417830a08
font_01_sfnt_off0000f784.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF784 17172 bytes
SHA-256: 71ea040daa2e9274a6446a2d072e9b35965ceaf5d444c291319bfe85f3e685cf
font_02_sfnt_off0001249f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1249F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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