Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b4a7d35b2475540…

MALICIOUS

PDF

76.3 KB Created: 2021-02-26 12:55:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: b1914aef82aa6ce03c735c6cea442f3f SHA-1: 97b19e8812307ac37a2c9cc13362f362482eba48 SHA-256: 0b4a7d35b24755401499b8ed5879cf893123aa6341a89aded606e43a7e459c84
182 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9807

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/award?keyword=define+flowchart+in+computer+science In PDF document text
    • http://kumululurug.scienceontheweb.net/pulabefolinevifofalu.pdfIn PDF document text
    • http://kipokefurur.mygamesonline.org/gukunajadepo.pdfIn PDF document text
    • https://falugasotemo.weebly.com/uploads/1/3/1/4/131410545/7185024.pdfIn PDF document text
    • http://rixorevu.getenjoyment.net/what_are_curriculum_areas_for_preschool.pdfIn PDF document text
    • https://cdn.sqhk.co/vixemujomu/dghnCja/zomovorebotez.pdfIn PDF document text
    • https://cdn.sqhk.co/mejofiwog/M3Uihif/guess_the_theme_song_quiz.pdfIn PDF document text
    • http://tejovotemikodes.getenjoyment.net/puxagetus.pdfIn PDF document text
    • https://cdn.sqhk.co/xokekekav/hbghehc/werewolf_prompts_tumblr.pdfIn PDF document text
    • https://mibirewisurux.weebly.com/uploads/1/3/5/3/135313447/6927695.pdfIn PDF document text
    • https://cdn.sqhk.co/feketukadoz/ihgijco/68972758843.pdfIn PDF document text
    • https://nowagomasililub.weebly.com/uploads/1/3/0/7/130775830/lurevevawo_tezisajusibu_kotunijomadijox_vefuguxalejudid.pdfIn PDF document text
    • http://minesaxofunawi.getenjoyment.net/57045271147.pdfIn PDF document text
    • https://fabezetenonuke.weebly.com/uploads/1/3/4/8/134846610/78467d88617e9f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zejusamipokera.myartsonline.com/zopovezoralawanurogilolax.pdfIn PDF document text
    • http://japinoxizidunub.myartsonline.com/nukusegomeviniw.pdfIn PDF document text
    • http://zaponabugati.epizy.com/8204630653.pdfIn PDF document text
    • http://wutowaxodod.epizy.com/bus_driving_games_free_apk.pdfIn PDF document text
    • http://vefelazubogimew.rf.gd/vonufodovokex.pdfIn PDF document text
    • http://wutejaxevewef.myartsonline.com/in_what_order_should_you_read_narnia.pdfIn 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 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000102cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102CF 5348 bytes
SHA-256: 651507c3a8a7796b59a4221b963f39dfaeee10d6701d3c19109612c52b858047

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