Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2ff6c6dc10c9348…

MALICIOUS

PDF

62.4 KB Created: 2021-01-06 12:27:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 475e6d8cfb443521c657752228e3692a SHA-1: 9221a00bd127b51e131e943b22e6eda3fff26517 SHA-256: d2ff6c6dc10c93483fb681b1bbbfba6b6b9f23064f5b4108938c6997fe1e0a1b
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan payload. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO spamming operation. The embedded URLs likely lead to malicious content or further stages of an 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
  • 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.
  • 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://trafffi.ru/aws?utm_term=jawani+teri+bijli+ki+tar+ringtone PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4369318/normal_5fd0745257d09.pdfIn PDF document text
    • https://cdn.sqhk.co/vuzefegevo/ljhxvnt/splendor_board_game_rules.pdfIn PDF document text
    • https://gaxatibixowoki.weebly.com/uploads/1/3/1/4/131452935/semeli.pdfIn PDF document text
    • https://fisolaxarod.weebly.com/uploads/1/3/4/4/134471724/240194.pdfIn PDF document text
    • https://janogawe.weebly.com/uploads/1/3/0/7/130776821/7169026.pdfIn PDF document text
    • https://cdn.sqhk.co/kagurase/v7igijc/lock_screen_windows_10_disable.pdfIn PDF document text
    • https://sudororurupe.weebly.com/uploads/1/3/4/6/134602833/gobositupojuve-kulura.pdfIn PDF document text
    • https://digokevun.weebly.com/uploads/1/3/4/7/134747151/3140752.pdfIn PDF document text
    • https://wepugimi.weebly.com/uploads/1/3/1/0/131070973/ec5b801.pdfIn PDF document text
    • https://lopiranurepo.weebly.com/uploads/1/3/4/7/134735856/ddb75.pdfIn PDF document text
    • https://jujopikin.weebly.com/uploads/1/3/4/2/134265816/rosagitizazaboji.pdfIn PDF document text
    • https://nozirokopen.weebly.com/uploads/1/3/4/6/134613575/72e323b95e.pdfIn PDF document text
    • https://napepoxamugif.weebly.com/uploads/1/3/3/9/133997580/b39b6716b63620.pdfIn PDF document text
    • https://falumegobe.weebly.com/uploads/1/3/4/7/134702986/japopisiwufoxonixo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/08a23352-072a-4f99-b0fc-ddf3a40c91e9/8129693105.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b7fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB7FD 5036 bytes
SHA-256: b9863aa6f1ab73ce66cd54e1f46e0ee1bd8c928f5664aba0b893404ae135a497
font_01_sfnt_off0000c94b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC94B 10504 bytes
SHA-256: 88387c923e28db23f571f52b0a49d92ab7f0984c7263ddd43feccde7bd234769

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