Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2e9fcd6c0d606e0…

MALICIOUS

PDF

34.0 KB Created: 2021-07-06 07:11:57 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: b7eb6840a56b15f5987f2c197556db41 SHA-1: 767df459e6fcce50f06d3ae40fa2efb52db3df73 SHA-256: a2e9fcd6c0d606e0a407a583d50d8fc1a383a1e36182f4496aefb68cc0c99d7a
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for a game hack redirector lure, pointing to a known malicious URL. The document body also contains this URL, reinforcing the lure. The ML classifier strongly flagged this PDF as malicious. While no scripts were extracted, the primary attack pattern involves redirecting the user to a malicious site, likely for credential harvesting or further malware delivery.

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/431946152/roblox-earn-game-hack In PDF document text
    • http://perpus.stihpada.ac.id/repository/best-free-minecraft-servers_GM479516143.pdfIn PDF document text
    • http://perpus.stihpada.ac.id/repository/how-to-sue-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.stihpada.ac.id/repository/roblox-trolling-hack_GM431946152.pdfIn PDF document text
    • http://perpus.stihpada.ac.id/repository/free-robux-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • http://perpus.stihpada.ac.id/repository/roblox-e-free_GM431946152.pdfIn PDF document text
    • http://perpus.stihpada.ac.id/repository/coin-master-hack-xyz-download_GM406889139.pdfIn PDF document text
    • http://perpus.stihpada.ac.id/repository/coin-master-hack-game-download_GM406889139.pdfIn PDF document text
    • http://perpus.stihpada.ac.id/repository/coinmaster-spin-ml-link_GM406889139.pdfIn PDF document text
    • http://perpus.stihpada.ac.id/repository/free-robux-stream_GM431946152.pdfIn PDF document text
    • http://perpus.stihpada.ac.id/repository/500-rebirths-at-a-time-hack-magnet-simulator-roblox-script_GM431946152.pdfIn PDF document text
    • http://perpus.stihpada.ac.id/repository/new-roblox-exploit-hack_GM431946152.pdfIn PDF document text
    • http://perpus.stihpada.ac.id/repository/free-minecraft-capes-no-mods_GM479516143.pdfIn PDF document text
    • http://perpus.stihpada.ac.id/repository/roblox-hack-free-robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://perpus.stihpada.ac.id/repository/free-robux-bots-allowed_GM431946152.pdfIn PDF document text
    • http://perpus.stihpada.ac.id/repository/get-free-robux-gg_GM431946152.pdfIn PDF document text
    • http://perpus.stihpada.ac.id/repository/coin-master-apk-hack-3527_GM406889139.pdfIn PDF document text
    • http://perpus.stihpada.ac.id/repository/freerobuxhack-us-2021_GM431946152.pdfIn PDF document text
    • http://perpus.stihpada.ac.id/repository/google-roblox-games_GM431946152.pdfIn PDF document text
    • http://perpus.stihpada.ac.id/repository/earn-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.stihpada.ac.id/repository/how-to-hack-coin-master-game_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_off00002fb4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FB4 22340 bytes
SHA-256: 3f0ac0a78a49d8aa68accc2cdfa5bd03a04fd4d1f1bb70d92671af76b7c6469b
font_01_sfnt_off00006168.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6168 18484 bytes
SHA-256: ec480973b95906799ecbce8e9211940b8d4b6d02a368574357cd37401f952f8b

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