Malicious PDF — malware analysis report

Static analysis result for SHA-256 32a7bf4af86d23a4…

MALICIOUS

PDF

92.7 KB Created: 2021-02-10 03:48:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 4a1d9029a4deb68210403579dd5d3f49 SHA-1: 44c2cb6d7d35228e2212a71e8f6862fe0f5a6194 SHA-256: 32a7bf4af86d23a4784759c2640715815eb18190c7a26a3c0f909762ef5c7cb0
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or phishing campaign. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and numerous external URLs point towards a malicious document, likely a phishing lure or SEO spam.

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://druttle.ru/123?utm_term=notice+of+appearance+florida PDF link annotation
    • https://lidafeli.weebly.com/uploads/1/3/4/6/134683499/95681f2.pdfIn PDF document text
    • http://goproits.com/bugoxobex9oyb5.pdfIn PDF document text
    • https://cdn.sqhk.co/bibilofefi/dNjhAgf/potagexeforiletorobig.pdfIn PDF document text
    • http://twobigs.space/79796824242vd96r.pdfIn PDF document text
    • https://cdn.sqhk.co/zujubiviv/heXdgiN/56952740494.pdfIn PDF document text
    • https://vaxokivov.weebly.com/uploads/1/3/1/4/131453734/1c3fb1.pdfIn PDF document text
    • https://cdn.sqhk.co/bapisolel/NjaGgfq/strategy_pattern_c_enum.pdfIn PDF document text
    • https://demuxovepeb.weebly.com/uploads/1/3/4/3/134311881/punuk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421970/normal_60051fa445e2e.pdfIn PDF document text
    • https://pawikewam.weebly.com/uploads/1/3/4/4/134445239/4acc80f95c7c37e.pdfIn PDF document text
    • https://fosozofafeg.weebly.com/uploads/1/3/1/8/131856121/somopisuwuk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366048/normal_5fffd9211b5e2.pdfIn PDF document text
    • http://canonsburglake.com/zombie_original_versiondiios.pdfIn PDF document text
    • http://betflixguvenilirmi.com/fadudalenawobugaruni322lf.pdfIn PDF document text
    • http://ogranicbio.fun/dibrugarh_university_bsc_mathematics_major_syllabus9aqm2.pdfIn PDF document text
    • https://zitobejamowimuk.weebly.com/uploads/1/3/4/6/134623616/9132197.pdfIn PDF document text
    • https://sibozigoguxo.weebly.com/uploads/1/3/0/9/130969143/dorojazizulunifime.pdfIn PDF document text
    • https://cdn.sqhk.co/nobegasosev/y8mohei/59677294452.pdfIn PDF document text
    • http://zanartcc.net/ginubakesavijozovinamaxlg.pdfIn PDF document text
    • https://cdn.sqhk.co/zisujidixa/gFCgijx/jiffy_lube_locations_mesa_az.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_off00012f04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F04 4940 bytes
SHA-256: b170bc1b5b4f9111f39a63a7f32f71526987c8b0d8cf30b04ea2edd5177b920f
font_01_sfnt_off00013fe8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13FE8 10372 bytes
SHA-256: 3a771aea4b6d87f6a9eb3f0360606f0ceea8015acc19e0477c8fd41e0be9a474

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