Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3865315684f728b…

MALICIOUS

PDF

35.4 KB Created: 2021-06-20 03:22:42 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 91d8d85ccac2b72a37adf967911e5454 SHA-1: 5f02b678b86d84f8556190441283ff9dee00efaf SHA-256: f3865315684f728bd754e56e0e21b090a76a97a0fb81f1c887d33a859afbb383
142 Risk Score

Malware Insights

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

The PDF contains numerous links, identified as a 'link farm', that lead to websites promising game hacks and free currency. The primary lure is 'Claim Free Robux Without Human Verification'. While no scripts were explicitly extracted, the PDF structure and heuristics suggest it's designed to redirect users to potentially malicious sites that could host further exploits or malware, aligning with T1566.001 (Spearphishing Attachment) and T1203 (Exploitation for Client Execution).

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/claim-free-robux-without-human-verification-game-hack PDF link annotation
    • http://slims.abulyatama.ac.id/repository/can-you-actually-get-free-robux_GM431946152.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/roblox-epic-mining-hack_GM431946152.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/how-to-make-a-free-server-in-minecraft-java_GM479516143.pdfIn PDF document text
    • http://slims.abulyatama.ac.id//repository/coin-master-reward-link_GM406889139.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/how-to-get-free-robux-promo-codes_GM431946152.pdfIn PDF document text
    • http://slims.abulyatama.ac.id//repository/how-to-get-more-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://slims.abulyatama.ac.id//repository/how-to-hack-someone-on-roblox_GM431946152.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/why-doesnt-roblox-play-with-cheat-engine-on_GM431946152.pdfIn PDF document text
    • http://slims.abulyatama.ac.id//repository/coin-master-hack-pro-gamers_GM406889139.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/roblox-heroes-online_GM431946152.pdfIn PDF document text
    • http://slims.abulyatama.ac.id//repository/coin-master-spin-blogspot_GM406889139.pdfIn PDF document text
    • http://slims.abulyatama.ac.id//repository/roblox-rewards-site_GM431946152.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/how-to-get-free-admin-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/bloxawards-hack-robux_GM431946152.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/descargar-roblox-hack-monedas-infinitas_GM431946152.pdfIn PDF document text
    • http://slims.abulyatama.ac.id//repository/coin-master-mod-apk-free-download-for-android_GM406889139.pdfIn PDF document text
    • http://slims.abulyatama.ac.id//repository/coin-master-links-for-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/cpat-hacker-in-madcity-roblox_GM431946152.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/coin-master-free-spins-app_GM406889139.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/descargar-coin-master-hackeado_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn 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_off00003150.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3150 22664 bytes
SHA-256: 96f0e99c210291f7038f6e199a6facd613a36b7dd4b67ffb0c79651edde8d8ea
font_01_sfnt_off000063a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63A5 19772 bytes
SHA-256: b9864bfbc1a5ef652a77fc7b0e63fae51a56e8a62a13b2508c1e7041de0d4eca

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