Malicious PDF — malware analysis report

Static analysis result for SHA-256 3af2962d70dbf841…

MALICIOUS

PDF

34.9 KB Created: 2021-07-06 23:23:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: f71f97801f90d280023b4af8991d9d49 SHA-1: 0156e0082f572f98619b664b3cea05f56d058325 SHA-256: 3af2962d70dbf841abd4c82198107ebc61e710a854b45b243a5f622622a47551
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded links that redirect to malicious infrastructure, specifically promoting "game hacks" and "free spins" for popular games. The primary lure URL is http://netcdn.tw/app/406889139/coin-master-facebook-hack-game-hack, which is associated with known malicious redirectors. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a social engineering tactic to drive users to potentially malicious websites, 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/406889139/coin-master-facebook-hack-game-hack In PDF document text
    • http://e-learningman2wonosobo.my.id/__statics/gudangsoal/files/coin-master-hacks-and-cheats_GM406889139.pdfIn PDF document text
    • http://e-learningman2wonosobo.my.id/__statics/gudangsoal/files/hack-coin-master-game-download_GM406889139.pdfIn PDF document text
    • http://e-learningman2wonosobo.my.id/__statics/gudangsoal/files/coin-master-free-spins-link-2021-april_GM406889139.pdfIn PDF document text
    • http://e-learningman2wonosobo.my.id/__statics/gudangsoal/files/free-private-server-roblox_GM431946152.pdfIn PDF document text
    • http://e-learningman2wonosobo.my.id/__statics/gudangsoal/files/roblox-adopt-me-free-pets_GM431946152.pdfIn PDF document text
    • http://e-learningman2wonosobo.my.id/__statics/gudangsoal/files/free-coin-master-spins-blog_GM406889139.pdfIn PDF document text
    • http://e-learningman2wonosobo.my.id/__statics/gudangsoal/files/roblox-hair-for-free_GM431946152.pdfIn PDF document text
    • http://e-learningman2wonosobo.my.id/__statics/gudangsoal/files/get-free-spins-coin-master-link_GM406889139.pdfIn PDF document text
    • http://e-learningman2wonosobo.my.id/__statics/gudangsoal/files/how-to-make-free-roblox-bloxburg_GM431946152.pdfIn PDF document text
    • http://e-learningman2wonosobo.my.id/__statics/gudangsoal/files/free-stuff-on-roblox-catalog-2021_GM431946152.pdfIn PDF document text
    • http://e-learningman2wonosobo.my.id/__statics/gudangsoal/files/coin-master-free-spin-and-coin-links_GM406889139.pdfIn PDF document text
    • http://e-learningman2wonosobo.my.id/__statics/gudangsoal/files/pig-master-free-coins-and-spins_GM406889139.pdfIn PDF document text
    • http://e-learningman2wonosobo.my.id/__statics/gudangsoal/files/free-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://e-learningman2wonosobo.my.id/__statics/gudangsoal/files/free-robux-generator-no-human-verification-100_GM431946152.pdfIn PDF document text
    • http://e-learningman2wonosobo.my.id/__statics/gudangsoal/files/moon-static-coin-master-generator-hacks-free_GM406889139.pdfIn PDF document text
    • http://e-learningman2wonosobo.my.id/__statics/gudangsoal/files/rbx-place-free-robux_GM431946152.pdfIn PDF document text
    • http://e-learningman2wonosobo.my.id/__statics/gudangsoal/files/coin-master-hacks-xyz_GM406889139.pdfIn PDF document text
    • http://e-learningman2wonosobo.my.id/__statics/gudangsoal/files/how-to-get-free-robux-without-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://e-learningman2wonosobo.my.id/__statics/gudangsoal/files/roblox-granny-money-cheat_GM431946152.pdfIn PDF document text
    • http://e-learningman2wonosobo.my.id/__statics/gudangsoal/files/robux-get-com_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off0000321a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x321A 23104 bytes
SHA-256: 68d857e28c3057cc5a6f137adc6e096a45cee63f66e68ed05da9fbc6c9c3228e
font_01_sfnt_off000065cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65CB 18324 bytes
SHA-256: 6ad1846c5a228a809b9de1cefde13e0c6880a4115f839aceb456980284c5160f

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