Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3f0ab9e56e74a28…

MALICIOUS

PDF

48.5 KB Created: 2021-06-10 12:49:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 33b3b849b4d1b0b86bbac9685c570ace SHA-1: e33590b4be7a07caea1b75f000a9968f424a44f6 SHA-256: c3f0ab9e56e74a285fdbd20ea2e7c0235c5d9bf0239ca1fcb8e9846fa614e993
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors and game hack lures, such as 'roblox-free-codes-generator-no-surveys-no-download-game-hack'. The document body and embedded URLs suggest a social engineering tactic to trick users into visiting potentially malicious websites. No scripts were extracted, but the presence of malicious links and the ML classifier's high confidence score indicate a high likelihood of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

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.tw/app/431946152/roblox-free-codes-generator-no-surveys-no-download-game-hack In PDF document text
    • http://firesafetyservices.biz/images/free-links-coin-master_GM406889139.pdfIn PDF document text
    • http://firesafetyservices.biz/images/free-game-pack-with-google-play-coin-master_GM406889139.pdfIn PDF document text
    • http://firesafetyservices.biz/images/easy-points-gg_GM431946152.pdfIn PDF document text
    • http://firesafetyservices.biz/images/best-free-minecraft-hacked-client_GM479516143.pdfIn PDF document text
    • http://firesafetyservices.biz/images/coin-master-tiradas-gratis-link_GM406889139.pdfIn PDF document text
    • http://firesafetyservices.biz/images/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://firesafetyservices.biz/images/pubg-uc-redeem-code-2021_GM1330123889.pdfIn PDF document text
    • http://firesafetyservices.biz/images/free-spins-for-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://firesafetyservices.biz/images/minecraft-font-free_GM479516143.pdfIn PDF document text
    • http://firesafetyservices.biz/images/free-robux-inspect-element-2021_GM431946152.pdfIn PDF document text
    • http://firesafetyservices.biz/images/roblox-top_GM431946152.pdfIn PDF document text
    • http://firesafetyservices.biz/images/get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://firesafetyservices.biz/images/free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://firesafetyservices.biz/images/how-to-hack-minecraft_GM479516143.pdfIn PDF document text
    • http://firesafetyservices.biz/images/free-robux-no-apps_GM431946152.pdfIn PDF document text
    • http://firesafetyservices.biz/images/minecraft-redeem-code-free_GM479516143.pdfIn PDF document text
    • http://firesafetyservices.biz/images/minecraft-reach-hack_GM479516143.pdfIn PDF document text
    • http://firesafetyservices.biz/images/free-hacks-for-coin-master_GM406889139.pdfIn PDF document text
    • http://firesafetyservices.biz/images/robux-hack-tools_GM431946152.pdfIn PDF document text
    • http://firesafetyservices.biz/images/links-to-get-free-coins-in-coin-master_GM406889139.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005271.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5271 26632 bytes
SHA-256: 5a5dfdb6a64f2b2be813fa8d5376bd0569ec1dc3bab388d54cc6e6faa9d54eae
font_01_sfnt_off00008dc3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8DC3 2888 bytes
SHA-256: 98ce3a4d7061366fb3a9af2e345629fc31d2d69a240c026d7744ec539822a48b
font_02_sfnt_off000097c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x97C0 19220 bytes
SHA-256: d16742f773d96f45cc6eb24bb864fc30aed863c3f539aaf79581319f71757e7a

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