Malicious PDF — malware analysis report

Static analysis result for SHA-256 97e8f5a207995dce…

MALICIOUS

PDF

86.4 KB Created: 2021-07-05 09:45:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 7a0631d190597681ce1d71bf8271f815 SHA-1: 8f418a2c1381c1796b6ce73c5b72d3f13e91b931 SHA-256: 97e8f5a207995dce5ef733be79655b9f7847f3abfd0303cd3c7fcdb166dff377
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1534 Internal Spearphishing

This PDF file was detected as malicious by ClamAV and exhibits characteristics of a credential phishing campaign. It impersonates an Apple ID login and contains multiple links, including one hosted on a compromised WordPress upload directory, directing users to a phishing site. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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
  • Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=has+been+received.
  • 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://prokoncept.hu/admin/blogfck/image/file/74462433515.pdf In PDF document text
    • http://ne-moloko.ee/wp-content/plugins/super-forms/uploads/php/files/1ab2fa29a8feca38860d66303bf8429a/27418578339.pdfIn PDF document text
    • https://mattweidnerlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160797d9c06dca---10755817621.pdfIn PDF document text
    • http://mfcwestenkwartier.nl/beta/userfiles/file/vulelakopovimiditid.pdfIn PDF document text
    • http://www.radio-kum.si/data/files/lezoten.pdfIn PDF document text
    • http://www.hcibatiment.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1609a358493054---10981127414.pdfIn PDF document text
    • https://xn--80aaa1anac6cg.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/22e984acd9cd42e0e19aa67bccedf634/14738216018.pdfIn PDF document text
    • https://eqonetech.com/upload/userfiles/files/30440632869.pdfIn PDF document text
    • https://velvetskin.pl/wp-content/plugins/super-forms/uploads/php/files/d3de26ad4454fdded86ecb39e41bc2cb/98855106781.pdfIn PDF document text
    • https://sealordhotels.com/ckfinder/userfiles/files/32871558581.pdfIn PDF document text
    • https://bentzendesign.se/wp-content/plugins/formcraft/file-upload/server/content/files/160de154eef96d---50680254954.pdfIn PDF document text
    • http://mirrorgallery.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608caaefccdf9---wojifafazewep.pdfIn PDF document text
    • https://mamo-tato.ro/userfiles/file/94312697541.pdfIn PDF document text
    • https://www.pennlighting.com/wp-content/plugins/super-forms/uploads/php/files/d2dbfdbae002a3f150b8d0a57bb606c9/nukakizugotediwutijo.pdfIn PDF document text
    • http://adacu.org/userfiles/file/20210622191015.pdfIn PDF document text
    • https://www.swissfillon.com/wp-content/plugins/super-forms/uploads/php/files/2dd0f0afcfb12811957fcb5808e855fe/93175203711.pdfIn PDF document text
    • https://tlpnw.com/wp-content/plugins/super-forms/uploads/php/files/87414c2e32392386702384ab846d875f/58782577873.pdfIn PDF document text
    • http://cpbnatation.fr/fckeditor/userfiles/file/mamanu.pdfIn PDF document text
    • http://go-trec.com/wp-content/plugins/super-forms/uploads/php/files/h522c095gqa4bot165lii1muv5/71889627022.pdfIn PDF document text
    • https://www.beachesbrewing.com/wp-content/plugins/super-forms/uploads/php/files/f5a042410c1c305ee5f0b521afb95006/5829826160.pdfIn PDF document text
    • http://paintingservicesonline.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160714538b220d---nubiwaxowivijekudig.pdfIn PDF document text
    • http://associacaoguainumbi.org.br/wp/wp-content/plugins/formcraft/file-upload/server/content/files/16088dba91b7c1---14241577474.pdfIn PDF document text
    • https://szud94.hu/img/sajatfile/files/16593892817.pdfIn PDF document text
    • https://progin.swiss/ckfinder/userfiles/files/gulisadazovutafezawuke.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=has+been+receivedPDF link annotation
    • 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_off0000efda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFDA 10296 bytes
SHA-256: 1a4531aa2d06433b057d3f78267aa05dc31af0b732bfc896e0ac7de93b3b2414
font_01_sfnt_off00010729.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10729 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011f3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F3B 17188 bytes
SHA-256: a8b4432cf55272c5571f67d6ca9c843c854dbe21b9734f0c94827525dbf01d71

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