Malicious PDF — malware analysis report

Static analysis result for SHA-256 29ebbc7e08f2ff8e…

MALICIOUS

PDF

34.6 KB Created: 2021-07-05 04:40:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: fda5822ecd2324347f52a7576553b571 SHA-1: 00e5473de0c4664e2f427fb73c1c5cb47b68c285 SHA-256: 29ebbc7e08f2ff8e5d8dedac323a9d15ae2f05e35ddc2664141d839552498d97
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors and lures users with promises of game hacks and free currency. The primary redirector URL, http://netcdn.tw/app/479516143/minecraft-servers-that-allow-hacks-game-hack, is a critical finding. The document body also contains numerous URLs pointing to other potentially malicious PDFs, suggesting a chain of lures. No scripts were extracted, but the overall pattern indicates 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/479516143/minecraft-servers-that-allow-hacks-game-hack In PDF document text
    • http://lib.uho.ac.id/library/repository/roblox-com-redeem_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/coin-master-free-coins-2021_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/free-spins-coin-master-haktuts_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/how-to-get-roblox-credit-for-free_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/free-roblox-intros_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/roblox-zombie-rush-free-guns_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/static-moonactive-net-rewards-2021_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/lazyblocks-com-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/woman-roblox_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/coin-master-free-coins-and-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/free-robux-by-watching-ads_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/cool-free-minecraft-skins_GM479516143.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/60-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/free-downloads-for-coin-master-daily-rewards_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/free-robux-hack-meme_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/free-spins-and-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/roblox-sign-in-free_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/how-to-get-free-mods-in-minecraft_GM479516143.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/earn-robux-today_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/minecraft-hack-app_GM479516143.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_off000031c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31C6 22336 bytes
SHA-256: f46456e13d25bda4c44abaec313803f8de4cbabfdfd12a437cdbbfa778d98975
font_01_sfnt_off00006365.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6365 18688 bytes
SHA-256: 52b008c1dee13834d2ec83d98dfe79a40f83e68d5b96d4fb2c84ac72eafae7a4

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