Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ac6aaf5286408b6…

MALICIOUS

PDF

82.2 KB Created: 2021-09-13 04:00:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 6fdd5f13862fb197a2dcb37884ff71c7 SHA-1: 3f95537ca0ae9166524363564516e31fc4c34ba6 SHA-256: 9ac6aaf5286408b6c15937d0cff723724dd3c281c006f183eec35c4c7863f9c7
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier as malicious. It contains numerous external links, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of these links indicates an attempt to lure users to external sites, likely for phishing or to download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://ketchas.ru/uplcv?utm_term=download+naruto+senki+all+version PDF link annotation
    • http://bnblspecialities.com/userfiles/files/kovujizixesonin.pdfIn PDF document text
    • http://lamekatus.com/uploads/ckeditor/files/lalulinoruduwezisopawa.pdfIn PDF document text
    • https://halkapsikoloji.net/userfiles/file/pavaj.pdfIn PDF document text
    • http://tangiahoang.com/skinkorea/Images_upload/files/zililubijaxupotale.pdfIn PDF document text
    • https://independentmusicleague.com/wp-content/plugins/super-forms/uploads/php/files/57c5e2a967e4afe625370eafd2c48deb/bemegolovemumanolafiwojer.pdfIn PDF document text
    • http://nicenpos.com/userData/board/file/44476684743.pdfIn PDF document text
    • https://maydongy.com/wp-content/plugins/super-forms/uploads/php/files/dkjf4rn88bnfk9c2bduckjlohs/26531951250.pdfIn PDF document text
    • https://smoothnomad.com/wp-content/plugins/super-forms/uploads/php/files/nne2qd90ugqq81435hn8fctf29/desulojorofu.pdfIn PDF document text
    • https://acp-luxusingatlanok.hu/ckfinder/userfiles/files/rikodutosejuvop.pdfIn PDF document text
    • https://whitelightdesign.com/wp-content/plugins/super-forms/uploads/php/files/fa45b919d19672c05929a09b4ced0164/molakefob.pdfIn PDF document text
    • https://www.lang-mayer.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613d865806638---japotas.pdfIn PDF document text
    • http://kursadowicz.pl/Upload/file/49145423060.pdfIn PDF document text
    • http://ulleungroadtour.com/FileData/ckfinder/files/20210905_7AC3C44524BAD507.pdfIn PDF document text
    • http://www.hkqi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c5163d5eff---33437511264.pdfIn PDF document text
    • https://motiwalainstitutes.org/userfiles/file/suzop.pdfIn PDF document text
    • http://smolensk-bakaleya.ru/userfiles/file/33633687142.pdfIn PDF document text
    • https://poker-fire.de/file/69705312540.pdfIn PDF document text
    • http://anpharma.net/upload/files/78120273349.pdfIn PDF document text
    • https://saraelv.no/wp-content/plugins/formcraft/file-upload/server/content/files/161300a5b46e8f---51150231916.pdfIn PDF document text
    • http://infosierra.es/images/editor/sipofopewididukix.pdfIn PDF document text
    • http://farmaciafici.com/userfiles/files/63668130451.pdfIn PDF document text
    • http://stylekd.ru/files/11537195812.pdfIn PDF document text
    • http://mextro.de/upload/files/70488585435.pdfIn PDF document text
    • https://www.havanasalsa-dance-tours.com/wp-content/plugins/super-forms/uploads/php/files/984cdb712bb65023e186aafaaa7971e2/ratogetisu.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_off0000dbf0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBF0 10584 bytes
SHA-256: 6071c760803734cc44c854c005fdbd8656371ecb6d5e28c6736713cc6a317b33
font_01_sfnt_off0000f446.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF446 18004 bytes
SHA-256: 4170d024df6f66118c4134ae37844994e032b6101722e4d775176011fc7f3d2b
font_02_sfnt_off00012369.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12369 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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