Malicious PDF — malware analysis report

Static analysis result for SHA-256 194e278ccd8b9464…

MALICIOUS

PDF

95.4 KB Created: 2021-06-26 10:20:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e2912b8456c4b14c7503a2a87927cd04 SHA-1: 5f3c04c41a3fd479ec0a40554070fa30f15fec42 SHA-256: 194e278ccd8b9464146a0270e51a039f5be0a5e46bc431a662352b088c46f625
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier with high confidence. Heuristics indicate it functions as a link farm, pointing to numerous distinct hosts, and specifically mentions a callback lure consistent with phishing or tech-support scams. While no scripts were extracted, the presence of embedded URLs and the nature of the heuristics suggest the document is designed to direct users to malicious sites or to initiate fraudulent phone calls.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9935

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) 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 http://hilltop1976.com/clients/24685/File/8878807618.pdf
    • https://ketgate.eu/wp-content/plugins/super-forms/uploads/php/files/dd26d863d8dc6202010c2613bfa1192f/53393044845.pdf
    • https://mygamedaysports.com/wp-content/plugins/super-forms/uploads/php/files/d390da988a5c5cdfec010e58d2a41884/90406869067.pdf
    • https://asiarsolutions.com/userfiles/file/gamavagajedigekubiwitilo.pdf
    • https://www.davidcosz.de/wp-content/plugins/super-forms/uploads/php/files/r8tlvej7pt96uuo8n2pgnct4le/batebarunurifaf.pdf
    • https://advancedcheckcashadvance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa1813428cb---34033696388.pdf
    • http://www.psstrecno.sk/wp-content/plugins/formcraft/file-upload/server/content/files/16085612feea6b---11438089421.pdf
    • http://ikhmongol.mn/ckfinder/userfiles/files/83870914566.pdf
    • http://www.phonefixcomo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f73876ffe2---dodidifiwiporigojodegape.pdf
    • http://wakingbeauty.com/wp-content/plugins/formcraft/file-upload/server/content/files/160864368afa6f---11679748243.pdf
    • http://www.champcaregivers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b54c787294a---fesudoxepo.pdf
    • https://koncnc.com/genelresimler/file/68072137932.pdf
    • https://iamluno.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071462ac9f75---37369297323.pdf
    • http://gdgom.com/upload/file/2106050911339160233rhvvg746dxi.pdf
    • https://honkakuji.jp/honkakuji/images/ckfinder/files/zefejawiguw.pdf
    • https://ocvirapuato.com.mx/wp-content/plugins/super-forms/uploads/php/files/d7507045e5806402d9e328d9ec056dba/49710327303.pdf
    • https://www.areatransfers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608425c1268d3---lidurulokaw.pdf
    • https://nceptionsolutions.com/wp-content/plugins/super-forms/uploads/php/files/4c42c8860ab269aeb84f79faa4706d78/53312856399.pdf
    • https://ludifrance.fr/userfiles/file/tagasezenemexeluveged.pdf
    • https://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/333d9e26f52eee52a5e0a74b1425eb0e/rogakibubifovim.pdf
    • https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/a4c451b722556d08e347741aa4151195/17281900967.pdf
    • https://www.novet.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607fded57cfc0---vokekinoludukumufiwiju.pdf
    • http://www.movingintofreedom.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3084462b57---welub.pdf
    • http://sushi-belovo.ru/files/jupuminupuvu.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=mortgages+for+overseas+property+spain
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010e71.bin
0e2ef2a6296b88a344c601f17d24b00c3f3ea25fd8dffe2bad2f7091c7e0af8f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10E71 18700 bytes
font_01_sfnt_off00013f7e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13F7E 16792 bytes
font_02_sfnt_off00015795.bin
56144ac2cd91ae09fdb1f2d81a6209fa13dc6b18b854d842cfd9323a482d34a9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15795 10660 bytes

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