Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f98a10d8430e89a…

MALICIOUS

PDF

69.7 KB Created: 2021-02-22 03:24:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 35e972f7163f4b0ed421b8fcc47aaafc SHA-1: a560337be93f228c86ef81d34941a3b8ecb1b50c SHA-256: 8f98a10d8430e89a79310b7d19b5e7a961c04c2fbf3c05e0d89019784e20df82
244 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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.
  • 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://crophysi.ru/wix?keyword=salon+policy+and+procedure+manual In PDF document text
    • http://springtea.space/bonetown_patch_1.1_1_cracka6fwy.pdfIn PDF document text
    • http://wbigs.space/aha_guidelines_blood_pressurex4e97.pdfIn PDF document text
    • https://gawirida.weebly.com/uploads/1/3/0/8/130874347/4763315.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420610/normal_5ff5700e314b2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407301/normal_5fd9ba128e0d0.pdfIn PDF document text
    • https://nitiruminaxodax.weebly.com/uploads/1/3/0/7/130738633/bogupa-falalek-levufimivaliz.pdfIn PDF document text
    • https://mipikarekegimo.weebly.com/uploads/1/3/1/6/131606279/1306720.pdfIn PDF document text
    • https://siresikewutawin.weebly.com/uploads/1/3/0/7/130739490/190ea53c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445340/normal_6032fc0eb2902.pdfIn PDF document text
    • https://sodomolu.weebly.com/uploads/1/3/5/3/135398587/1284508.pdfIn PDF document text
    • http://muzoc.xyz/47647665195f8jo8.pdfIn PDF document text
    • https://zodemabu.weebly.com/uploads/1/3/4/8/134896511/46d305130.pdfIn PDF document text
    • http://sallely.xyz/98912024423e4qtl.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/sepovutapakogaf/nopibunopusuduror.pdfIn PDF document text
    • https://s3.amazonaws.com/jolunenafobuw/62657147141.pdfIn PDF document text
    • http://lagadasisipas.rf.gd/entity_relationship_diagram_template_visio.pdfIn 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_off0000d4b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4B5 5248 bytes
SHA-256: 6f2b1c0625264eab733dd47e4ed94c06344c7d0419ed72a8660edcee67c27005
font_01_sfnt_off0000e682.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE682 10360 bytes
SHA-256: f6c096390f5c2610001844c5c008a197b2f0f9435cb809b58eebeae9274ff424

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