Malicious PDF — malware analysis report

Static analysis result for SHA-256 51cfd6ff1882cfed…

MALICIOUS

PDF

72.2 KB Created: 2021-03-04 07:14:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 969e44016a662c2c94f7c19c3070bf22 SHA-1: 71038ef5c7b1e66a2710fcff66af929eb7486ec1 SHA-256: 51cfd6ff1882cfed132cf7641631362ec9ee40c250a76c8e95810e23c9211714
184 Risk Score

Malware Insights

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

This PDF document contains a large number of external links, many hosted on disposable domains, indicating a link farm designed to redirect users. The document's content, while appearing innocuous, is a lure to these external sites. The presence of PDF_SEO_LINK_FARM and PDF_SEO_DISPOSABLE_LINK_FARM heuristics, along with ClamAV detection, strongly suggests malicious intent. No scripts were extracted, but the overall structure points to a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9704

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 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
  • 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://botokaw.ru/award?keyword=ejemplos+de+un+ensayo+de+comparacion+y+contraste PDF link annotation
    • http://kawlites.online/587918490287out5.pdfIn PDF document text
    • https://cdn.sqhk.co/rolaravez/fXhgjcO/brawl_stars_characters_ranked.pdfIn PDF document text
    • https://tixasenuwafoja.weebly.com/uploads/1/3/4/6/134658158/34d041a8e68.pdfIn PDF document text
    • http://igclienteam.com/byzantium_2012_full_movie19owj.pdfIn PDF document text
    • https://zaxizibu.weebly.com/uploads/1/3/4/6/134672664/7178262.pdfIn PDF document text
    • https://cdn.sqhk.co/rolileduvof/b6nhi1G/dead_eyes_powfu_ringtone_download.pdfIn PDF document text
    • https://wagemerefav.weebly.com/uploads/1/3/2/7/132712282/060283e.pdfIn PDF document text
    • https://cdn.sqhk.co/bekutojeke/ihhhLgg/miwurejunabub.pdfIn PDF document text
    • https://mologikonazo.weebly.com/uploads/1/3/4/7/134706863/1200508.pdfIn PDF document text
    • https://sevafigetof.weebly.com/uploads/1/3/4/9/134902911/5726923.pdfIn PDF document text
    • https://cdn.sqhk.co/mopomotop/igWrie7/nupibigadavuve.pdfIn PDF document text
    • https://cdn.sqhk.co/juvadujud/kOFjih7/private_vpn_application_guard.pdfIn PDF document text
    • https://cdn.sqhk.co/dudumadopole/Xhhjjx8/44934365727.pdfIn PDF document text
    • https://sapixokevabose.weebly.com/uploads/1/3/4/4/134498139/66898a03ab51.pdfIn PDF document text
    • https://midusafamiriron.weebly.com/uploads/1/3/4/7/134702540/4093b2c.pdfIn PDF document text
    • https://falosaxosudo.weebly.com/uploads/1/3/4/0/134017699/6935692.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000eb3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB3F 5356 bytes
SHA-256: fd4202425b559acc269b2ce83e065401f94de5b3491c525ce7367e2a5d6d5f05
font_01_sfnt_off0000fd68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD68 11292 bytes
SHA-256: 8a188283f0a216b732767e7ec5861983572d83f8218ffa1a2408ff518896d129

Open this report in the interactive analyzer, or submit your own file for analysis.