Malicious PDF — malware analysis report

Static analysis result for SHA-256 b426954692bac158…

MALICIOUS

PDF

70.5 KB Created: 2020-12-27 13:07:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: ce1e1bcf5ab293d45d876aca5c60dc85 SHA-1: 9a850003a2e6bd5b6c7b31b31af4657e6bb5330d SHA-256: b426954692bac1580f5676754778d8ece124b17b48f5196e82445574fe25ad22
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous links to external websites, many of which are part of a link farm designed to distribute malicious content. The primary URL, 'https://ggtraff.ru/123?utm_term=teacher+arrested+thumb+drives+seized', appears to be a redirector to further malicious sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely 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
  • 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.
  • 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://ggtraff.ru/123?utm_term=teacher+arrested+thumb+drives+seized In PDF document text
    • https://jotevalosovem.weebly.com/uploads/1/3/4/3/134385082/rulin.pdfIn PDF document text
    • https://cdn.sqhk.co/naritiba/hnhbicH/totally_battle_simulator_game.pdfIn PDF document text
    • https://cdn.sqhk.co/kufedefivuvu/dhija6o/jolirabogalufexe.pdfIn PDF document text
    • https://cdn.sqhk.co/duditizonut/Jijslfk/warexiserere.pdfIn PDF document text
    • https://cdn.sqhk.co/nopawuwam/f5jeMjd/janewaraxebakazetuk.pdfIn PDF document text
    • https://cdn.sqhk.co/wefopijupe/8beN9gh/91501701362.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422620/normal_5fdedca96638a.pdfIn PDF document text
    • https://vozexipazaxa.weebly.com/uploads/1/3/4/4/134444785/6ce586fd737.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420020/normal_5fa962b7b566e.pdfIn PDF document text
    • https://cdn.sqhk.co/dakuwuwuzije/fyif0jc/super_pinball_master_mod_apk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446398/normal_5fd24753c48e6.pdfIn PDF document text
    • https://cdn.sqhk.co/jumifokujuje/jbAgfjb/59952345242.pdfIn PDF document text
    • https://satobolusiv.weebly.com/uploads/1/3/1/3/131398412/muvasegofir-wudetogijeje-rivapufafig.pdfIn PDF document text
    • https://cdn.sqhk.co/fevivesuxofo/ihhcgcm/76996027471.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

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_off0000d861.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD861 5348 bytes
SHA-256: 68d27164f12b347281cd77d140bd51b5c8cfbeb33fcd2386531fc3e6a67b5a52
font_01_sfnt_off0000ea6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA6D 10204 bytes
SHA-256: cdb23a7a1bb5c34e7cf0a1663ebbec0adad1609cc454850ef6f0c846bc6b3bf7

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