Malicious PDF — malware analysis report

Static analysis result for SHA-256 801edd891f4ae126…

MALICIOUS

PDF

133.1 KB Created: 2021-01-12 21:15:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: e47799dd22c35163c8b8d257f9016b16 SHA-1: b9f7dd7decba59519bd00cac10ee59ad1a2e2fe9 SHA-256: 801edd891f4ae126740cea677af83d02815ca2265d2e7f1af6371c5ea606cb99
126 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains a large number of embedded URLs, many pointing to disposable hosting services, suggesting a link farm designed to redirect users to malicious sites. The document body is heavily obfuscated and contains what appears to be metadata rather than user-readable content, further indicating a malicious intent to obscure its true purpose.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • 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/123?utm_term=persona+4+ps2+100+guide PDF link annotation
    • https://kaxojolomo.weebly.com/uploads/1/3/4/8/134885197/sarozi.pdfIn PDF document text
    • https://cdn.sqhk.co/tewokozogop/NqggDia/40395610372.pdfIn PDF document text
    • https://raxagipob.weebly.com/uploads/1/3/4/8/134883443/dojekiregekoji_rufokuwifefif.pdfIn PDF document text
    • https://jawowigo.weebly.com/uploads/1/3/0/7/130774982/8f27b9d29.pdfIn PDF document text
    • https://cdn.sqhk.co/devepogisog/jdLY9Pd/find_my_verizon_cell_tower.pdfIn PDF document text
    • https://site-1178312.mozfiles.com/files/1178312/bodimar.pdfIn PDF document text
    • https://site-1177329.mozfiles.com/files/1177329/tafolotutatitufowo.pdfIn PDF document text
    • https://site-1198644.mozfiles.com/files/1198644/motorola_adb_interface_driver_windows_8__1.pdfIn PDF document text
    • https://site-1177051.mozfiles.com/files/1177051/63301636621.pdfIn PDF document text
    • https://site-1174576.mozfiles.com/files/1174576/fotisinepotaporikasam.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/tinajabizoreguf/gupegutuzofopesopal.pdfIn PDF document text
    • https://s3.amazonaws.com/subud/napigunoriseborazajoxitik.pdfIn PDF document text
    • https://s3.amazonaws.com/nopomewegobij/socialism_capitalism_and_democracy.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_off0001cd69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1CD69 5512 bytes
SHA-256: 86e6bfabd65df4520cc962f03d9b403497a8591d680685a7751634562669ce00
font_01_sfnt_off0001e043.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1E043 12000 bytes
SHA-256: 1a1959512cbc0e0c916dd892c9bb50c03e1b0281aeda84269673351b794ea637

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