Malicious PDF — malware analysis report

Static analysis result for SHA-256 3aceca8b7d2744c4…

MALICIOUS

PDF

133.7 KB Created: 2020-12-25 01:48:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: a065fcdfa104a1a0e79e28fabee64885 SHA-1: 7ea9e1fe1bcf21906279cbe3a42b71f071e94c01 SHA-256: 3aceca8b7d2744c4796bcb94d3827d336a1141b8bc8aa08b035fb2a92dc2b63c
206 Risk Score

Malware Insights

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

This PDF file is identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a link farm and callback phishing lure. The document's structure and embedded URLs suggest an attempt to redirect users to malicious content or engage them in a scam. While no scripts were explicitly extracted, the presence of numerous external links and the callback lure heuristic strongly indicate a phishing or social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://trafftec.ru/aws?utm_term=chad+country+profile+pdf PDF link annotation
    • https://mazazogadof.weebly.com/uploads/1/3/4/3/134374066/wolari.pdfIn PDF document text
    • https://lanujedajifita.weebly.com/uploads/1/3/1/3/131382078/xidebuti.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500199/normal_5fb680a791acf.pdfIn PDF document text
    • https://tureduritisamo.weebly.com/uploads/1/3/4/6/134676104/cbcc589e86aa.pdfIn PDF document text
    • https://cdn.sqhk.co/gusorewiwal/RaeIiae/money_cheat_gta_5_ps4_online_2020.pdfIn PDF document text
    • https://nunipotewisi.weebly.com/uploads/1/3/4/8/134892443/vejiwul_xawik_muxomimif.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470821/normal_5fd71483812a0.pdfIn PDF document text
    • https://suzoniku.weebly.com/uploads/1/3/4/4/134456843/2261ea84a5.pdfIn PDF document text
    • https://cdn.sqhk.co/jamolipa/6ajfjiF/1_clue_words_and_syllables_answers_level_13.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371014/normal_5f89e0de49600.pdfIn PDF document text
    • https://dopotalufiru.weebly.com/uploads/1/3/4/6/134601398/ded4a59a1d364.pdfIn PDF document text
    • https://pamukisap.weebly.com/uploads/1/3/4/7/134761215/zixula.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001b6d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B6D9 5072 bytes
SHA-256: 1b83e48e1b151c6eb706f27c9aa8082f70875813525ad22109e1cca2fcccc030
font_01_sfnt_off0001c81b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C81B 13952 bytes
SHA-256: 2641a4c73c124f798d42a337c1664cf57537ca0d24149d78de8e2ed51c1bfedc
font_02_sfnt_off0001f447.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F447 16136 bytes
SHA-256: df8c02b4e7c13d1ce52248e16a86d4c8494e6987b1d779035a25bcace2870e2e

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