Malicious PDF — malware analysis report

Static analysis result for SHA-256 7af6fff2c7955f4b…

MALICIOUS

PDF

72.6 KB Created: 2021-06-18 18:25:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 01babb587d8071175d2bdab71daadf3e SHA-1: 2ce400de9b616e171bf0f5c9805987e2e5f0a36c SHA-256: 7af6fff2c7955f4be4bd368be76decd334cd11220aaf327785aba836c3dd99fa
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains multiple links to external websites, many of which appear to be compromised WordPress uploads, suggesting a link farm designed to distribute malicious files. The ML classifier and ClamAV detection strongly indicate malicious content, likely a phishing lure disguised as a song download. No scripts were extracted, but the PDF structure and URL patterns are indicative of a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 http://strategie-online.net/catalogue_dynamique/file/42335742572.pdf In PDF document text
    • https://higher-reason.com/wp-content/plugins/super-forms/uploads/php/files/5e34cve4a9msvs2r1cbo7kflv4/sotaxuz.pdfIn PDF document text
    • https://webmodeli.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b40414e297---pejetilemawevupo.pdfIn PDF document text
    • https://ksboutlet.com/file/files/49611742128.pdfIn PDF document text
    • http://vtracauto.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f571c25d08---gamokepijuwesibazotatiwe.pdfIn PDF document text
    • https://expeditions-travel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a61d5a8b2f---dijasiv.pdfIn PDF document text
    • http://abogarestudio.com/userfiles/file/jifapukokilesitozip.pdfIn PDF document text
    • http://xn--aknmedikal-yub.com/uploads/file/zerotedipebuwujidavejol.pdfIn PDF document text
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/5db4cd0ff1bbe34ccc9de2532ee95b0f/44521413147.pdfIn PDF document text
    • http://aksaxena.com/bpms/includes/fckeditor_uploads/userfiles/file/vixanuv.pdfIn PDF document text
    • https://www.infrascale.com/wp-content/plugins/super-forms/uploads/php/files/bd5b27d19842c81ba38b282a1c4606af/69973033472.pdfIn PDF document text
    • https://weinquartier.at/wp-content/plugins/super-forms/uploads/php/files/e193d6fa374054cabc44a4137b8d24bc/sulepodimine.pdfIn PDF document text
    • https://creationstationdance.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075793ea1d37---binipibikagefaposudaz.pdfIn PDF document text
    • https://humble-brag.com/wp-content/plugins/super-forms/uploads/php/files/mrvs8djamc7dbajk4gco7h1hv7/lujuwigi.pdfIn PDF document text
    • http://firmykominkowe.pl/Obrazki/edytor/file/63122424443.pdfIn PDF document text
    • http://www.toptehnik.si/images/8664296891.pdfIn PDF document text
    • http://lasfyy.com/uploadfile/file/20210528170135669.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=uyire+movie+songs+karaoke+free+downloadPDF 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dd18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD18 5536 bytes
SHA-256: cd157a6c34aed47b0dd2b04c8a1c5f1d2905aaf26fc34c360d927e14c549311f
font_01_sfnt_off0000effb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFFB 10996 bytes
SHA-256: fde13065596fdc83edaa9388e4187bb885d1c4b27c33a15d08bc9fa62d93ca6a