Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a740046aea0ca6e…

MALICIOUS

PDF

84.3 KB Created: 2021-09-19 23:31:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 063aee31bad6d31b3a9a4544a4834015 SHA-1: c1b307d973f67060f0d49218e8981071859a098e SHA-256: 9a740046aea0ca6e0d4ddc7533f6b85bbcd61f8c1c7e8100c38f8f7bb6870924
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous URLs, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of external URIs and link farm heuristics indicates an attempt to distribute malware or conduct phishing operations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://garglob.ru/uplcv?utm_term=application+qui+d%C3%A9shabille+les+gens+android PDF link annotation
    • https://adamslakeband.org/userfiles/file/77815683101.pdfIn PDF document text
    • http://domgr11.ru/uploads/files/90259666864.pdfIn PDF document text
    • https://www.jahnigterbraak.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1613192ac4a746---libafiwazoxozizofifad.pdfIn PDF document text
    • https://kompaspt2.com/contents/files/56150161785.pdfIn PDF document text
    • http://baohanhranghm.com/upload/img/files/zuwakijepiwoworalab.pdfIn PDF document text
    • http://bephoangdung.vn/uploads/ckfinder/files/ranivekoduwafawibes.pdfIn PDF document text
    • http://darstin.com/userfiles/files/zuguxiworupaxefegovavoxut.pdfIn PDF document text
    • https://pulsekb.ru/admin/ckfinder/userfiles/files/62474889147.pdfIn PDF document text
    • https://anzhero-sudzhensk.verlauf-ekb.ru/admin/ckfinder/userfiles/files/bepugitofizobavumogixamof.pdfIn PDF document text
    • https://vgi-vn.vn/app/webroot/img/files/1341076280.pdfIn PDF document text
    • https://mdteam.se/ckfinder/userfiles/files/30972925845.pdfIn PDF document text
    • http://dkstores.gr/userfiles/file/68314018196.pdfIn PDF document text
    • http://www.vljainandco.com/userfiles/files/65830162352.pdfIn PDF document text
    • http://dpnovelty.com/upload/files/48399834330.pdfIn PDF document text
    • http://urduhadith.org/survey/userfiles/files/46412154562.pdfIn PDF document text
    • http://ghettaetamionarchitetti.it/userfiles/files/zusajeza.pdfIn PDF document text
    • http://photonart.nl/phpcmsys/file/rexixediw.pdfIn PDF document text
    • https://expungemyrecordnj.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f43add112a---luzakuvi.pdfIn PDF document text
    • http://swvocal.com/data/se2/file/76455755466.pdfIn PDF document text
    • http://antik-cafe-bergen.de/wp-content/plugins/formcraft/file-upload/server/content/files/161380bb01f9f2---tijozep.pdfIn PDF document text
    • http://amdind.com/userfiles/file/52764556476.pdfIn PDF document text
    • http://itagqatar.zajeltel.com/itag/file/files/pakotetodimokeku.pdfIn PDF document text
    • https://kurek-rowery.pl/user_pict/file/pefedijezofobokej.pdfIn PDF document text
    • http://www.edgartownschool.net/uploads/files/marakedasazuratinizupabu.pdfIn PDF document text
    • http://tech-sub.com/userfiles/file/basibaruxowirobakob.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_off0000dbf4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBF4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f406.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF406 20308 bytes
SHA-256: efe53cb577bff285f3d11008a49d7488e1b7e1d0243799a95760f5dd83386d71
font_02_sfnt_off00012735.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12735 11312 bytes
SHA-256: 5014871042504ef4acb0c448ee602fca216668ae84d6c7aafd9b2cccc46d5da7

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