Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d768cfe04d4462f…

MALICIOUS

PDF

61.2 KB Created: 2021-02-08 22:08:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: b30042e38573423ca19df392b75024db SHA-1: d8a05cbdd78165228dacfca256d9d3a8c49eea8e SHA-256: 3d768cfe04d4462f457d68faed97eb1cca88c6d4d67efd11e800872a0fe559a3
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://bologen.ru/123?utm_term=bella+russo+brand PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4365657/normal_5ffc384cd7805.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370286/normal_6014b397b1d88.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426816/normal_6005c15490823.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450430/normal_5fcaabec63d44.pdfIn PDF document text
    • http://infonewstravel.com/domino_pizza_calories_malaysiayi0my.pdfIn PDF document text
    • http://istra-backwater.ru/legipisadujh1la1.pdfIn PDF document text
    • http://50offshop.info/51446898404mz9q7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452593/normal_601b0209cc641.pdfIn PDF document text
    • http://winoorama.website/52588065882n29nx.pdfIn PDF document text
    • http://pafiwuz.66ghz.com/pneumatic_valves.pdfIn PDF document text
    • http://topstudy.fun/godefejazexi2ts8i.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408594/normal_5ff51f6b6e4a4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fifusudevop.rf.gd/rogue_lockpicking_leveling_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/zafijukopa/dragon_ball_z_budokai_3_ps4.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b220.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB220 5008 bytes
SHA-256: 7fc6983f9fc47c505c069e7d5608882542abf2779720a4ab0518d76ff89e58f9
font_01_sfnt_off0000c32d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC32D 10512 bytes
SHA-256: c3f87ba4fcfad0ffdafcac80df96cee0ca6d426031dcd511dc5e320aaac68dd6

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