Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce193e8611ccec6d…

MALICIOUS

PDF

84.3 KB Created: 2020-12-25 03:01:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: b5efa9311b6b6d1754006d63cf14c86e SHA-1: 0cc2aca286e1f493ecdfc29c0f6b5236f98c3d61 SHA-256: ce193e8611ccec6d81b736dfb5d2def62a9c1626a0543cc52237432447eaad78
274 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file contains multiple embedded URLs, including one that leads to a known malicious redirector and another that impersonates Walmart for credential phishing. The presence of a link farm and the ML classifier's high confidence score further indicate malicious intent. The document body is heavily obfuscated, but the heuristics clearly point to a phishing attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://kerumeso.weebly.com/uploads/1/3/4/6/134641164/jolegavekeziba_fideredo_pimafan.pdf.
  • 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://gettraff.ru/strik?utm_term=slice+food+preparation In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366625/normal_5f91309a6a65e.pdfIn PDF document text
    • https://kerumeso.weebly.com/uploads/1/3/4/6/134641164/jolegavekeziba_fideredo_pimafan.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365551/normal_5fdc69206f65f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4472182/normal_5fe2db771b805.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368746/normal_5fcd51961e943.pdfIn PDF document text
    • https://sopakefexije.weebly.com/uploads/1/3/4/3/134398413/1647560.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366406/normal_5f9f434653911.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/xeponodij/16_career_clusters_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/dinilederu/46635270248.pdfIn PDF document text
    • https://s3.amazonaws.com/vukusa/64840117401.pdfIn PDF document text
    • https://s3.amazonaws.com/lanubili/81082695249.pdfIn PDF document text
    • https://s3.amazonaws.com/zarusegibitumet/tv_guide_roswell_nm.pdfIn PDF document text
    • https://s3.amazonaws.com/busutafitufe/madaziwenepizimizusu.pdfIn PDF document text
    • https://s3.amazonaws.com/kewuxejikiwe/knives_out_mod_apk.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000feef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEEF 4860 bytes
SHA-256: 88d80a2ac094428244a73de847f2d23e57d98fe5a5f049ea82dae0d19927003b
font_01_sfnt_off00010f6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F6E 11340 bytes
SHA-256: 430285759dbc3474bf7f559940310bce1c644104daac6237015e5c9495e18304
font_02_sfnt_off000135fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x135FC 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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