Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2d84abe68ccec9c…

MALICIOUS

PDF

34.3 KB Created: 2021-06-27 13:15:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 8e57d0843f594392b847af84f020d2df SHA-1: 4fe7b78ed15ed8439188b6c397eb96c7d7a417dd SHA-256: e2d84abe68ccec9c47bb5d82be9b6eb13f347eec4630c41eec160fd138f49d0a
142 Risk Score

Malware Insights

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

The PDF document contains numerous links to websites offering game hacks and generators, indicating a lure for users to visit potentially malicious sites. The heuristic 'PDF_SEO_LINK_FARM' suggests a large number of such links were generated, likely for SEO manipulation or to distribute malware. 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/roblox-dominus-free-game-hack PDF link annotation
    • http://lib.stimykpn.ac.id/repository/best-way-to-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/how-to-get-spins-on-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/free-roblox-followers-generator-2021_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/wizard-hacks_GM479516143.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/pokemon-go-free-vs-premium_GM1094591345.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/coin-master-date-and-time-hack_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/free-spin-link-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/hacking-a-roblox-hotel-troll-banned_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/free-robux-for-free_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/hack-para-tener-robux-en-roblox_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/free-robux-and-tix-generator-no-survey-no-download_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/minecraft-free-reddit_GM479516143.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/cheat-granny-roblox-2021_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/minecraft-pe-hacks-ios_GM479516143.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/roblox-watch-ads-for-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/coin-master-daily-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/daily-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/minecraft-hacks-18-9_GM479516143.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/roblox-prison-life-hack-download-2021-mobile_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/games-like-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
font_00_sfnt_off00002d40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D40 22760 bytes
SHA-256: aa87e7ec5202bb6812353e854c69113a99103b7a6b8fd10cfa90e0bc10606e29
font_01_sfnt_off00006028.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6028 19340 bytes
SHA-256: 51aabce8a0fbddbcaac96e5367ec788fa01bdb555ce302519f38501c33e57caf

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