Malicious PDF — malware analysis report

Static analysis result for SHA-256 6618ec251079a3e6…

MALICIOUS

PDF

69.4 KB Created: 2020-12-26 00:28:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0e1ef9a37b5fd9ede17b7e4708b19b16 SHA-1: 594e12f0d86e9c0c5cc88c14344ea2a482c7478c SHA-256: 6618ec251079a3e69d8a97a4990e8c5a00bd1789a4a1627f7e7f8e3245807143
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains numerous external links, many hosted on disposable domains, suggesting a link farm or phishing lure. The presence of embedded URLs and the overall structure indicate an attempt to redirect users to malicious sites, likely for credential harvesting or further malware delivery.

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
  • 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://traffine.ru/strik?utm_term=festa+de+aniversario+infantil+masha+eo+urso
    • https://mepafuxutare.weebly.com/uploads/1/3/4/6/134660934/1816054.pdf
    • https://sorafenime.weebly.com/uploads/1/3/4/3/134320910/magup-radevibevepi-mofopawa.pdf
    • https://xuredetinumimo.weebly.com/uploads/1/3/4/6/134630251/5c2e35f.pdf
    • https://cdn.sqhk.co/kapopajij/WiinigQ/protozoa_vs_bacteria_vs_virus_size.pdf
    • https://cdn.sqhk.co/dowufagit/UghjivA/fnaf_vr_help_wanted_song_by_jt_music.pdf
    • https://rigukolanerimi.weebly.com/uploads/1/3/4/5/134519373/6073827.pdf
    • https://cdn.sqhk.co/bafebolabefo/PHMgihj/sushi_neko_menu_queen_creek.pdf
    • https://datugabow.weebly.com/uploads/1/3/4/7/134745554/2646971.pdf
    • https://rawesare.weebly.com/uploads/1/3/3/9/133997405/b1521cb9677375.pdf
    • https://cdn.sqhk.co/jumifokujuje/MicQyjf/bingo_caller_software_free.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/6449588d-9002-44de-9f1b-e642b83fc5f2/pivuvoriberewezoxazo.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d4cd.bin
9b9bfb2a74b4558a59aab17359ffe525265e345997e78e4bbde502d02f725593
pdf-font-stream PDF embedded font (sfnt) at offset 0xD4CD 5160 bytes
font_01_sfnt_off0000e634.bin
a903a3449067988d68e3365a5aec15a856283baf8f333c78f48b7ee95d30e2d5
pdf-font-stream PDF embedded font (sfnt) at offset 0xE634 10280 bytes