Malicious PDF — malware analysis report

Static analysis result for SHA-256 2fa56ec04dc9d013…

MALICIOUS

PDF

34.3 KB Created: 2021-07-05 19:34:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 55e3e33328fdd736e98bde538516eaa8 SHA-1: 548c0d488a1af97019b54f49b35f37a91b82a82d SHA-256: 2fa56ec04dc9d0134abbe4e133fff9ae33ecab852e0226d5383bfd67df9e3bdc
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure related to game hacks and generators, directing users to a malicious redirector. The document body and heuristics indicate a clear intent to trick users into visiting the provided URL, which is associated with known malicious infrastructure. No scripts were extracted, but the embedded URLs and the nature of the lure strongly suggest a phishing or scam attempt.

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/406889139/coin-master-hack-version-download-2021-android-game-hack In PDF document text
    • https://fib.ub.ac.id/sac/repository/roblox-change-name-free-pastbin_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/official-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/wurst-client-18-9_GM479516143.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/roblox-easy-free-robux_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/roblox-walk-through-walls-hack-download_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/hack-coin-master-android_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/roblox-april-fools-hack_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/minecraft-marketplace-free_GM479516143.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/roblox-tokyo-ghoul-project-killzone-hack_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/free-minecraft-server-maker_GM479516143.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/how-to-execute-hack-scripts-in-roblox_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/how-to-hack-to-have-robux_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/free-roblox-gift-codes_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/roblox-character-free_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/free-redvalk-code-roblox-news_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/free-money-and-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/boku-no-roblox-cheat-engine_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/minecraft-dungeons-free-download-pc_GM479516143.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/hacks-for-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
stream_002_off00002cfe.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2CFE 23044 bytes
SHA-256: 04af66f154ce86b4f8ca32413fcaed86a63507585f66031e993a9d2d7e0c67f1
font_01_sfnt_off000060bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60BD 19120 bytes
SHA-256: 9c59e8689655b7c29414ac36463dda1b40bf56690c49a500d3d64997c009534a

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