Malicious PDF — malware analysis report

Static analysis result for SHA-256 bcab48412bbdfab5…

MALICIOUS

PDF

76.4 KB Created: 2021-06-13 19:28:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 506ddb77154281b8e1ffbf3b4241eb6d SHA-1: 3a670b464b2836e35e105a106e71707bde762bb9 SHA-256: bcab48412bbdfab5e38c5fef83271d27702e51b8884a7daca701110bd8b6b060
156 Risk Score

Malware Insights

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

The PDF file 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 ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with techniques used to host malicious content.

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 https://pistant.ru/uplcv?utm_term=joseph+campbell+el+viaje+del+heroe+pdf PDF link annotation
    • https://capitalsyndic.com/userfiles/file/kajew.pdfIn PDF document text
    • https://alphaveneers.co.uk/wp-content/plugins/super-forms/uploads/php/files/c19f77e3d47eafe2ecd2384333290bff/masofopegipegavos.pdfIn PDF document text
    • https://total-sport.pl/img/upload/files/katezawuzinefowi.pdfIn PDF document text
    • https://spaslask.pl/wp-content/plugins/super-forms/uploads/php/files/aucv78vskm9i1ur9l3qfej1r89/tasubelitub.pdfIn PDF document text
    • https://nam.it/wp-content/plugins/formcraft/file-upload/server/content/files/1606f92720a941---gewijudosodujoxafobo.pdfIn PDF document text
    • http://www.asslar.de/downloads/59391756767.pdfIn PDF document text
    • https://netshopnepal.com/userfiles/file/97977805849.pdfIn PDF document text
    • https://lightsourceindiana.com/wp-content/plugins/super-forms/uploads/php/files/2856ee7713d65eee81fbef4d9fc904f6/mabopemikiropezoretit.pdfIn PDF document text
    • http://dirabrealtors.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607953b8adc83---91975879759.pdfIn PDF document text
    • https://bowenpainter.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b9ab65b2b53---34196097743.pdfIn PDF document text
    • http://mya1fc.com/files/ckuploads/files/95423780551.pdfIn PDF document text
    • http://bebelino.ru/userfiles/file/32771080077.pdfIn PDF document text
    • https://brusroom.com/wp-content/plugins/super-forms/uploads/php/files/99aff0f44135f07a8a3be81fb274dee2/resamekug.pdfIn PDF document text
    • http://www.prieteniitehnicii.ro/documente/file/30577553597.pdfIn PDF document text
    • https://leunamgroup.com/wp-content/plugins/super-forms/uploads/php/files/4bde9757cdacaa1a2fa2121d49f21397/tamoxavuzuximelixafepagu.pdfIn PDF document text
    • http://esipro.fr/userfiles/file/rupepigufakuzad.pdfIn PDF document text
    • https://patriot.ch/wp-content/plugins/super-forms/uploads/php/files/nc1ho3u3nqitdd0vjdbjr4alk6/pametazepulejap.pdfIn PDF document text
    • http://aweibel.com/Photo/file/luzinotujolavelib.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA7C 5660 bytes
SHA-256: 732214ba0136939b5609e4c8e00690752e2684f38c380caeb42f954042516279
font_01_sfnt_off0000fd96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD96 11468 bytes
SHA-256: e1b1e9259460340a3bf12933be5dec0dadd5ef97323d5db00af48ecb40b9ac7a