Malicious PDF — malware analysis report

Static analysis result for SHA-256 08c860c3cd660f69…

MALICIOUS

PDF

71.1 KB Created: 2021-05-16 16:08:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 69356eed01c8492ed5c69f6c110b68b2 SHA-1: 5741f448934e9815805d25cf9d237cd3e898dc76 SHA-256: 08c860c3cd660f69ce872144812c13086577929d1b0a60b9ccc50e1e2788cea7
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file is classified as malicious, exhibiting characteristics of a phishing lure. It contains numerous links, many pointing to compromised WordPress sites, designed to redirect users to external, potentially malicious content. The document body, though heavily obfuscated, suggests a lure related to a game guide, likely to entice clicks on the embedded malicious URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • 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://infrive.ru/uplcv?utm_term=hearthstone+lich+king+guide+paladin PDF link annotation
    • https://gfow.om/wp-content/plugins/super-forms/uploads/php/files/mtubb1tp1usmrg7bj5dtubnkfj/33268492472.pdfIn PDF document text
    • https://dispomydeal.com/wp-content/plugins/super-forms/uploads/php/files/c01ee52f2abae7a7f22cc707b8d1b459/28360723097.pdfIn PDF document text
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/kog8st4j6d40ulit9hl6g6p3r2/41190951258.pdfIn PDF document text
    • https://mikepromedia.com/wp-content/plugins/super-forms/uploads/php/files/cs1qcv044dosjas1hga8m77103/54838680426.pdfIn PDF document text
    • http://skolicka.eu/foto/images/file/60015316307.pdfIn PDF document text
    • https://baileyelectrical.services/wp-content/plugins/super-forms/uploads/php/files/numfn90q30obvksuuqqodmds1p/bubadefenarutaw.pdfIn PDF document text
    • http://kystop.com/wp-content/plugins/super-forms/uploads/php/files/1j88m6u89iua5sjjh2690boev5/luzikesup.pdfIn PDF document text
    • https://stefandes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c04706e765---68309844036.pdfIn PDF document text
    • http://goref.ru/files/file/sutonuxefoxunedijojo.pdfIn PDF document text
    • http://vincityhomes.vn/wp-content/plugins/super-forms/uploads/php/files/i2c9jhkeoimr069u527b1arjfk/fenibubajamubutafi.pdfIn PDF document text
    • https://yourtuscanyguide.com/wp-content/plugins/super-forms/uploads/php/files/99nte6u4obdolumb1a5rebhok1/fobavi.pdfIn PDF document text
    • https://iamluno.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a37bc542c3---45759220612.pdfIn PDF document text
    • https://tenekedjieva.com/uploads/file/tulubipodawavirelipejol.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_off0000d987.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD987 5360 bytes
SHA-256: 61639d7e17d131dddee4d1f743e67a0f02670b85d53208e6f71f6e8699413e64
font_01_sfnt_off0000ebb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBB9 10460 bytes
SHA-256: 898265090031c74e63196c77503c29d1770e224d23f9c46e77d98629d88e582c

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