Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ac929844a0dd162…

MALICIOUS

PDF

62.7 KB Created: 2021-03-25 15:11:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2697e7f6c912202d44a8c95b57e7d9f7 SHA-1: 6e4a635ac464f6287f834875fa48d23d7b7b8728 SHA-256: 9ac929844a0dd162d8e9c802e1955fcd65848e77f8ae77d349fb5a472d87e9ec
202 Risk Score

Malware Insights

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

The PDF file contains a screenshot lure, a common tactic for phishing. It hosts a mass external PDF link farm and includes a critical malicious redirector link to 'yafferge.ru'. The ClamAV detection further confirms its malicious nature, likely as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4046

Heuristics 5

  • 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 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 62 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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=important+formulas+for+aptitude+questions+pdf
    • http://stat-index-co.com/55548825366wd8np.pdf
    • https://cdn.sqhk.co/lomotutuwe/hcruugO/28561355666.pdf
    • https://cdn.sqhk.co/fitodofafe/iiejhhd/91953053473.pdf
    • https://cdn.sqhk.co/budajawisore/YhdC9jg/subaru_starlink_free_trial.pdf
    • http://unityfree.xyz/nad_2600_power_amplifier_for_salet1t4k.pdf
    • https://vataripisak.weebly.com/uploads/1/3/4/6/134600115/5064062.pdf
    • http://invitesistem.ru/relakefda6y.pdf
    • https://cdn.sqhk.co/pifizumux/acL2nRY/22302437831.pdf
    • https://vejazejama.weebly.com/uploads/1/3/1/3/131381369/fujubuwaduziku.pdf
    • https://luwutike.weebly.com/uploads/1/3/4/5/134518400/5739943.pdf
    • https://cdn.sqhk.co/fekerepusa/iegdTja/momisorufexukuj.pdf
    • http://bachanalytics.com/exercices_corrigs_sur_les_acides_alpha_aminspsui2.pdf
    • https://kibodowusi.weebly.com/uploads/1/3/4/5/134588916/nejogetosagif.pdf
    • http://subbellassecret.com/reading_comprehension_online_games_5th_grade2db6b.pdf
    • https://d321836a-1bf8-47c4-b4d3-67fe1e7f0250.filesusr.com/ugd/33ab24_2ff9f1b5fee941c5b52b145d0b69ffdd.pdf?index=true
    • https://s3.amazonaws.com/lezopobigeza/sepsis_guideline_2019.pdf
    • https://s3.amazonaws.com/gogoxowiniza/98686548724.pdf
    • https://s3.amazonaws.com/petikamov/38490125457.pdf
    • https://s3.amazonaws.com/nafibanefexex/70621963899.pdf
    • https://6c71f620-b6e5-46cc-9e58-526c5f0a7a41.filesusr.com/ugd/1c90dc_b894963780ac470a805d8fa2ff84e504.pdf?index=true
    • https://s3.amazonaws.com/litunux/kejikoxojutop.pdf
    • https://s3.amazonaws.com/wazorixekunafob/2nd_grade_language_arts_workbook.pdf
    • https://2eeb51df-07ba-4372-80d9-1ef4646fc7f7.filesusr.com/ugd/6af210_9761a7a08ccf4c1e982ed54df58d2784.pdf?index=true
    • https://67dec473-0a9c-497c-80b1-62a4c84c5046.filesusr.com/ugd/0aab01_452998bd087549d7ac65d4d88f979d7d.pdf?index=true
    • https://s3.amazonaws.com/tulosa/quizlet_app_apk.pdf
    • https://s3.amazonaws.com/befarekogol/rodadojimomepos.pdf
    • https://329f26c8-0235-4118-8622-173d264d9cf1.filesusr.com/ugd/221f3a_555441975bfb44d2a10a3412c1faecda.pdf?index=true
    • https://s3.amazonaws.com/zisulamisozoto/canon_printer_scanner_driver_free.pdf

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