Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c909b3f302ce0b4…

MALICIOUS

PDF

33.4 KB Created: 2021-07-06 17:23:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-26
MD5: e0c2c2b540bcd1b47c8551f959c041ca SHA-1: d678700551f15a6092d6a1cc46644acb83892920 SHA-256: 0c909b3f302ce0b4663d5ca6948fac06a01e4229d3811070f7b24183c929ac3a
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically advertising a 'free generator / game hack'. The document body and embedded URLs reinforce this lure, pointing to a URL that is likely part of a phishing or scam campaign. No scripts were extracted, but the primary attack vector appears to be social engineering via a malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • 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.
  • 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
  • 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.tw/app/479516143/free-minecraft-bedrock-game-hack In PDF document text
    • http://library.atim.ac.id/repository/how-to-make-shirts-for-free-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/pumpkin-guts-free-robux_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/best-free-roblox-survival-games_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/free-tiktok-followers-no-human-verification_GM835599320.pdfIn PDF document text
    • http://library.atim.ac.id/repository/roblox-no-download-hack_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/free-roblox-generator-for-roblox_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/cool-free-tshirts-on-roblox_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/you-promised-my-son-free-robux_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/roblox-hack-robux-pastebin-octubre-2021_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/tango-hack-roblox_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/how-can-u-get-free-robux_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/coin-master-free-coins-2021_GM406889139.pdfIn PDF document text
    • http://library.atim.ac.id/repository/how-to-get-free-hair-on-roblox-on-ipad_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/meme-attack-roblox-cheats_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/youtube-free-robux-legit_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/roblox-genuine-hack_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/free-spin-coin-master-hacktoman_GM406889139.pdfIn PDF document text
    • http://library.atim.ac.id/repository/roblox-cheat-engine-63_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/free-robux_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/roblox-free-online-game-demo_GM431946152.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_off00002fc6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FC6 21516 bytes
SHA-256: 1f883fdbde24e5d8edc25a90ec7017f12a2d7a88138165653ca02195b1a85eb8
font_01_sfnt_off00005ede.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5EDE 18560 bytes
SHA-256: 8a1cf310a32837577002de6ae703504663fc8f6c74f3557264522e251e416ebe

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