Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e53485f0c86f8ce…

MALICIOUS

PDF

67.3 KB Created: 2021-01-31 00:17:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 62dc9ff121a06f32033d2ee66c728da6 SHA-1: 18ebeff12ee196e8e14e7d09e0adc44965e36ab9 SHA-256: 2e53485f0c86f8ce59375efabf2b96e26d0b69ebb1a01c848b20f1cabdd0aa6f
156 Risk Score
Tags
free-cdn-ebook-manual-lure

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 also indicate malicious intent. While no scripts were explicitly extracted, the nature of the links and the PDF structure strongly suggest it's designed to redirect users to malicious content, potentially for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • 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/123?utm_term=saltwater+state+park+hours PDF link annotation
    • https://cdn.sqhk.co/difanemifal/c2idChh/v_live_houston_drake.pdfIn PDF document text
    • http://subbellassecret.com/988749001893c12y.pdfIn PDF document text
    • http://dsv-trening.ru/samurai_sword_stanceskyr8j.pdfIn PDF document text
    • https://cdn.sqhk.co/tipefimex/FSgPgdY/mosopepofexufaxubon.pdfIn PDF document text
    • https://peramixirado.weebly.com/uploads/1/3/1/6/131637131/6125830.pdfIn PDF document text
    • https://cdn.sqhk.co/videgogaf/ggXJghE/flipman_skip_tracing.pdfIn PDF document text
    • https://cdn.sqhk.co/jisanipu/haLxjdN/neighborhood_watch_app_near_me.pdfIn PDF document text
    • https://cdn.sqhk.co/bugininaxi/gKaX0jc/siguxelimufumodojuko.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476756/normal_5fe1280c6de85.pdfIn PDF document text
    • https://cdn.sqhk.co/jeporikate/geji6ln/donkey_kong_diddy_kong_quest_rom.pdfIn PDF document text
    • https://cdn.sqhk.co/nunamarajop/cuxiejf/ruguwigexim.pdfIn PDF document text
    • https://cdn.sqhk.co/zupitefa/fVNs8ys/minesweeper_hard_mode_tips.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_off0000cba9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBA9 5168 bytes
SHA-256: c472006731c6d24e3b5b5e0d3b1339264397589c06422e7da7fc15c6acc2997a
font_01_sfnt_off0000dd45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD45 10488 bytes
SHA-256: ac7be16a55c8db50ff1e130ad17cf5f99786cfde3f2b7d30b67122dfa178c2d7

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