Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0adac091e1250a5…

MALICIOUS

PDF

76.2 KB Created: 2021-04-04 21:25:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 826ae772b36d554db7366b6e7b1a747f SHA-1: 29e8268fbe9bc9e101f00e71808b7e9950cc7a68 SHA-256: e0adac091e1250a5637bb26be070c511f0b626c829b301f2b5f0bb9b29a5293e
134 Risk Score

Malware Insights

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

The PDF contains invisible links that redirect to a URL designed to mimic a CAPTCHA verification page, likely to harvest credentials. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links suggest a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Invisible PDF links to CAPTCHA-themed web lure high PDF_CAPTCHA_LINK_LURE
    PDF contains invisible clickable link annotations that point to a CAPTCHA/capcha-themed web path. This is a common phishing and ClickFix-style routing pattern: the PDF itself is inert, while the linked page performs the credential prompt or fake verification.
  • 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://dafemum.ru/123?utm_term=recaptcha+contact+form+7+wordpress
    • https://static.s123-cdn-static.com/uploads/4383692/normal_60096938e6d1a.pdf
    • https://bafipiwefewojex.weebly.com/uploads/1/3/4/5/134576197/wemobotekomik.pdf
    • http://bonusiotsbera.online/fishman_sa220_manualpnzoe.pdf
    • https://static.s123-cdn-static.com/uploads/4497658/normal_6008781ff3b8e.pdf
    • https://tezubowaxax.weebly.com/uploads/1/3/4/6/134640868/1a060.pdf
    • http://detonic-italy.website/whkf-dwhv_home_depotebxqo.pdf
    • https://jivetigaforivuj.weebly.com/uploads/1/3/4/3/134350389/fibefesatidunele.pdf
    • http://my-favshoph.online/do_electric_fences_work_on_huskiesmmhwx.pdf
    • https://static.s123-cdn-static.com/uploads/4451352/normal_5fe554b8bb99b.pdf
    • https://zakazorexan.weebly.com/uploads/1/3/1/4/131407051/zowizidip_genusepixij_xefowozaku.pdf
    • http://blognews.top/how_to_maintain_mitsubishi_air_conditioner7k9p4.pdf
    • http://zelopaqq.xyz/42278178289vvmqn.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/55c5e048-dff1-4a53-8832-d93208c5cbab/3608232345.pdf
    • https://uploads.strikinglycdn.com/files/8d365bf1-a95e-4566-acef-22bea216d691/berger_reloading_manual.pdf
    • https://s3.amazonaws.com/pojikovewijeja/pomekatuvelajesib.pdf
    • https://s3.amazonaws.com/wupixufekijax/levupez.pdf
    • https://s3.amazonaws.com/liguwubore/hounds_of_baskerville_movie_1959.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000deca.bin
9cc749b9479c5d645f9f7dd718245c86f46bf16dcd29d4391d8eaa62fd840c61
pdf-font-stream PDF embedded font (sfnt) at offset 0xDECA 5540 bytes
font_01_sfnt_off0000f19a.bin
4499d80ac86800490e57321b90a76aabc89ed9336d9a13109266af3e74bff1ac
pdf-font-stream PDF embedded font (sfnt) at offset 0xF19A 21932 bytes