Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c355e52d87026ec…

MALICIOUS

PDF

34.1 KB Created: 2021-06-26 10:20:50 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 5c94bf0e1a556083599b809b06358dcb SHA-1: 7dfbce39b09053e477176368f27947f82bfe67c5 SHA-256: 4c355e52d87026ec601fb57d265bd930a01f1950f42c3dd8e1e8da3732e38793
142 Risk Score

Malware Insights

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

This PDF document contains numerous links that mimic game hacks and generators, a common lure for phishing or malware distribution. The heuristic 'PDF_GAME_HACK_REDIRECT_LURE' and the presence of many external links indicate a link farm designed to redirect users to potentially malicious content. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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.
  • PDF links to a 'free generator / game hack' redirector high PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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 http://netcdn.co/app/431946152/free-robloxs-makeup-game-hack PDF link annotation
    • http://slims.abulyatama.ac.id/repository/haktuts-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://slims.abulyatama.ac.id//repository/blogspot-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://slims.abulyatama.ac.id//repository/coin-master-free-spins-and-coins-blogspot_GM406889139.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/how-to-get-free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • http://slims.abulyatama.ac.id//repository/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://slims.abulyatama.ac.id//repository/coin-master-gold-cards-hack-english_GM406889139.pdfIn PDF document text
    • http://slims.abulyatama.ac.id//repository/how-do-you-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://slims.abulyatama.ac.id//repository/free-robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/minecraft-windows-10-edition-free-with-java_GM479516143.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/how-to-get-free-robux-on-roblox-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/coin-master-facebook-page_GM406889139.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/roblox-getting-hacked_GM431946152.pdfIn PDF document text
    • http://slims.abulyatama.ac.id//repository/free-robux-codes-generator-no-verification_GM431946152.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/drpoppa-anti-cheat-roblox_GM431946152.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/coinmaster-spin-ml_GM406889139.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/free-roblox-girl-hair-codes_GM431946152.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/haktuts-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/roblox-free-badges_GM431946152.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/spinuri-gratis-coin-master_GM406889139.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/game-toolbox_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002f38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F38 21808 bytes
SHA-256: 1fe5acc4b0c25add94a607f80d372d720efd38a14977818a51a25321046f0240
font_01_sfnt_off00005f47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F47 19332 bytes
SHA-256: 3fafeb6b0d18556118695ba7768fa563569b00a67e0a8b7e75337720d614d2fd

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