Malicious PDF — malware analysis report

Static analysis result for SHA-256 c52f0404bfbee286…

MALICIOUS

PDF

42.3 KB Created: 2021-05-17 04:40:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: e3322f94661efb6268d4a4184eeaef0b SHA-1: aad52b07dd220d58ac364358dafe659c734efbb8 SHA-256: c52f0404bfbee286c32eb3fdfd297215783567b49718d951d726cdf7cee57cc7
142 Risk Score

Malware Insights

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

This PDF document contains numerous links to external websites that offer game hacks and generators, indicating a lure-based attack pattern. The heuristic findings suggest it functions as a link farm, directing users to potentially malicious content. The primary IOCs are the external URLs used in these lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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 https://netcdn.xyz/app/479516143/how-to-get-minecraft-dungeons-for-free-game-hack PDF link annotation
    • http://energotestcontrol.ru/images/what-is-exploiting-in-roblox_GM431946152.pdfIn PDF document text
    • http://energotestcontrol.ru/images/coin-master-hack-for-android_GM406889139.pdfIn PDF document text
    • http://energotestcontrol.ru/images/mcmaster-club-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://energotestcontrol.ru/images/how-to-hack-coin-master-ios-2021_GM406889139.pdfIn PDF document text
    • http://energotestcontrol.ru/images/minecraft-free-download-2021_GM479516143.pdfIn PDF document text
    • http://energotestcontrol.ru/images/hack-coin-master-app-ios_GM406889139.pdfIn PDF document text
    • http://energotestcontrol.ru/images/coin-master-free-coins-amp_GM406889139.pdfIn PDF document text
    • http://energotestcontrol.ru/images/how-to-get-20210-robux-for-free_GM431946152.pdfIn PDF document text
    • http://energotestcontrol.ru/images/free-spins-coin-master-2021-no-verification_GM406889139.pdfIn PDF document text
    • http://energotestcontrol.ru/images/coin-master-2021-free-spins-link-blogspot_GM406889139.pdfIn PDF document text
    • http://energotestcontrol.ru/images/robux-fun-hack_GM431946152.pdfIn PDF document text
    • http://energotestcontrol.ru/images/free-robux-app-real_GM431946152.pdfIn PDF document text
    • http://energotestcontrol.ru/images/hack-coin-master-with-lucky-patcher_GM406889139.pdfIn PDF document text
    • http://energotestcontrol.ru/images/how-to-get-free-robux-without-any-verification_GM431946152.pdfIn PDF document text
    • http://energotestcontrol.ru/images/robux-com-free_GM431946152.pdfIn PDF document text
    • http://energotestcontrol.ru/images/mangocheats-com-hack-coin-master-cheat_GM406889139.pdfIn PDF document text
    • http://energotestcontrol.ru/images/robux-gift-card-free_GM431946152.pdfIn PDF document text
    • http://energotestcontrol.ru/images/how-to-get-free-robux-in-2021_GM431946152.pdfIn PDF document text
    • http://energotestcontrol.ru/images/how-to-get-a-free-dominus-in-roblox_GM431946152.pdfIn PDF document text
    • http://energotestcontrol.ru/images/free-spins-and-coins-for-coin-master_GM406889139.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
stream_003_off00004a20.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A20 24680 bytes
SHA-256: 596e93c848abc4df93b29d595f560357775b3dd9fc1cf99d93d24ace7485e76b
font_01_sfnt_off00008257.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8257 18472 bytes
SHA-256: 65ee82f26cafa7906902f4dbf8f4098f0781a130d3f16ad2d63d9ccc83542dd0

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