Malicious PDF — malware analysis report

Static analysis result for SHA-256 34da318fc84f38b2…

MALICIOUS

PDF

70.9 KB Created: 2021-02-14 06:54:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 4cf33f5a7fdad21b371e7b7a90d0ee51 SHA-1: 0508e6deed674dda3bf721cd91e126fff1753438 SHA-256: 34da318fc84f38b2c0ae629ee76c3130ba00e320aa66ba849702f80cf8f19750
186 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
  • 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.
  • 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://baarspo.ru/wb?keyword=brochure%20design%20templates%20free%20%20ai PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4382948/normal_5fd0a3f2b4a46.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464065/normal_602166baf2048.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410441/normal_5ff4a39361165.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407986/normal_601e749eb9e4a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446379/normal_5fc99d756e216.pdfIn PDF document text
    • http://kismyketio.com/nozobowisa4gk13.pdfIn PDF document text
    • https://pojekemo.weebly.com/uploads/1/3/4/4/134469054/bozod.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447880/normal_5ffb1f16cab9f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375703/normal_601706a849f6c.pdfIn PDF document text
    • http://grampus-shop.com/pmbok_6bbx26.pdfIn PDF document text
    • https://bazojosazim.weebly.com/uploads/1/3/6/0/136086377/1990366.pdfIn PDF document text
    • https://tubozabuzimez.weebly.com/uploads/1/3/4/8/134878922/334bf9a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497344/normal_601b1cff825ef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449605/normal_60168795b47fd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453556/normal_60049ee791b1e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366984/normal_60275b472be16.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381788/normal_601f1c7bc860b.pdfIn PDF document text
    • http://creditreportusa.info/wallpaper_hd_free_caro3mry.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_off0000d76e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD76E 5616 bytes
SHA-256: f6f0f85e5566145a77e295af129cb4c1f4765b8ca453373e28ee65409957c4e1
font_01_sfnt_off0000ea5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA5E 10744 bytes
SHA-256: a0f37f4276b5497eec222d56ff6b674ec028108d7f075cb6bc5739d35e65b121

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