Malicious PDF — malware analysis report

Static analysis result for SHA-256 9bf6a432ce414b1f…

MALICIOUS

PDF

69.3 KB Created: 2021-06-06 09:49:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 9d7be7621da6a38d41e4851da09b3689 SHA-1: d0abf5c22c10650db49ebc6a120e98b5bd1e5613 SHA-256: 9bf6a432ce414b1f885280239973aecc96928c06e314f2ef26df1c3306400827
184 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

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. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9678

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://catamma.ru/pbw?utm_term=alfabeto+movil+para+imprimir+pdf PDF link annotation
    • https://wadewasugidaf.weebly.com/uploads/1/3/0/7/130775384/wizoxisulozaf.pdfIn PDF document text
    • https://gokejaxax.weebly.com/uploads/1/3/6/0/136056436/1733361009116b6.pdfIn PDF document text
    • https://gafibuludumogid.weebly.com/uploads/1/3/1/4/131453415/b49bc2063ae.pdfIn PDF document text
    • https://nelunozulugekis.weebly.com/uploads/1/3/0/7/130739970/satuxaraku.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495034/normal_5ffa58318ba4d.pdfIn PDF document text
    • https://karujelibofab.weebly.com/uploads/1/3/1/4/131406149/mibuzujisidimuliji.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421360/normal_5fe44672ea21d.pdfIn PDF document text
    • https://tatuxosigataban.weebly.com/uploads/1/3/4/7/134770737/4706885.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/99e615ac-1849-4076-a46a-9d4b849948e6/88297380702.pdfIn PDF document text
    • http://mevuteled.pbworks.com/f/56103677764.pdfIn PDF document text
    • http://jasiduvegulu.pbworks.com/f/how_to_study_life_science_grade_10.pdfIn PDF document text
    • http://wozixokumo.pbworks.com/w/file/fetch/144703644/82562810129.pdfIn PDF document text
    • http://redelaw.pbworks.com/f/suicide_squad_joker_song_download_free.pdfIn PDF document text
    • http://kimotamiju.pbworks.com/f/full_body_gym_workout_beginner_female.pdfIn PDF document text
    • http://zekodunu.pbworks.com/f/xuwibolosakax.pdfIn PDF document text
    • http://fotikeralo.pbworks.com/f/danmachi_volume_14_translation.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb874186-88d0-4215-8116-3e60c6e0253f/dell_1704fpt_monitor_specifications.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_off0000e8e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8E5 5196 bytes
SHA-256: b1f52b2290dd359f97fc52ebd17ce7e3a2eb139469ed997af160e4e505121f1e

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