Malicious PDF — malware analysis report

Static analysis result for SHA-256 a219f71623a84611…

MALICIOUS

PDF

44.5 KB Created: 2021-06-03 13:48:36 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 0a8f0749db19dfdf8044d74709dd4560 SHA-1: fe4dd3ed4826359ccc0507b77ad7f517cb7d9c9f SHA-256: a219f71623a846112599bce5dccdfeb0b70add7540340150fb5e4234123ba40d
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to websites that are flagged as malicious redirectors, specifically advertising game hacks and free currency. The document body and heuristics indicate a lure for free game-related content, likely to trick users into downloading malware or visiting phishing sites. No scripts were extracted, but the embedded URLs are the primary indicators of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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 https://netcdn.online/app/479516143/minecraft-hacked-client-bedrock-game-hack In PDF document text
    • http://lib.kunci.or.id/repository/coin-master-hack-spins-and-coins-unlimited-free-download_GM406889139.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/coin-master-ios-hack_GM406889139.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/coin-master-free-cards-link-2021_GM406889139.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/roblox-free-roblox_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/www-robux_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/free-robux-2021_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/official-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/minecraft-auto-miner-hack_GM479516143.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/can-you-really-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/master-coin-hack-mod_GM406889139.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/roblox-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/free-minecraft-wallpaper_GM479516143.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/free-spins-coin-master-legit_GM406889139.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/pubg-for-uc_GM1330123889.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/claim-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/roblox-scam_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/roblox-hack-apk_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/how-to-get-free-daily-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/how-to-get-free-minecraft-alts_GM479516143.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/free-4-mobile-24-com-robux_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
stream_004_off00005148.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5148 25460 bytes
SHA-256: 06402f103e44a797f0fec35c9a205e2ee6d153da9b3f3c772fcca97f5750f756
font_01_sfnt_off00008b1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B1A 18344 bytes
SHA-256: cec5df14c13053b95980c4aea59b0ff00c617a437a79699219b389062a1adae6

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