Malicious PDF — malware analysis report

Static analysis result for SHA-256 804af8c2524bc334…

MALICIOUS

PDF

34.3 KB Created: 2021-07-06 10:11:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 3371dbd9dafed94eb3720bcb9cb33f3d SHA-1: 2c9b10b02a15f2375651e5f1406abd631361072c SHA-256: 804af8c2524bc3344635e7871af893ff5a596dcc3b309e4d6d4d0e669e2272d1
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high 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.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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/431946152/roblox-studio-free-robux-game-hack PDF link annotation
    • http://sarny-rada.org/ckfinder/userfiles/files/minecraft-bedrock-free-with-java_GM479516143.pdfIn PDF document text
    • http://sarny-rada.org/ckfinder/userfiles/files/coin-master-free-coins-link-2021-deutsch_GM406889139.pdfIn PDF document text
    • http://sarny-rada.org/ckfinder/userfiles/files/how-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://sarny-rada.org/ckfinder/userfiles/files/how-are-people-hacking-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • http://sarny-rada.org/ckfinder/userfiles/files/hack-an-account-on-roblox_GM431946152.pdfIn PDF document text
    • http://sarny-rada.org/ckfinder/userfiles/files/free-robux-codes-2021-real_GM431946152.pdfIn PDF document text
    • http://sarny-rada.org/ckfinder/userfiles/files/roblox-generator-com_GM431946152.pdfIn PDF document text
    • http://sarny-rada.org/ckfinder/userfiles/files/robux-hack-dot-net_GM431946152.pdfIn PDF document text
    • http://sarny-rada.org/ckfinder/userfiles/files/free-roblox-adder_GM431946152.pdfIn PDF document text
    • http://sarny-rada.org/ckfinder/userfiles/files/free-robux-com-roblox_GM431946152.pdfIn PDF document text
    • http://sarny-rada.org/ckfinder/userfiles/files/how-to-make-clothes-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://sarny-rada.org/ckfinder/userfiles/files/unlimited-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://sarny-rada.org/ckfinder/userfiles/files/coin-master-hack-online-no-human-verification_GM406889139.pdfIn PDF document text
    • http://sarny-rada.org/ckfinder/userfiles/files/broward-county-roblox-free_GM431946152.pdfIn PDF document text
    • http://sarny-rada.org/ckfinder/userfiles/files/minecraft-xbox-free_GM479516143.pdfIn PDF document text
    • http://sarny-rada.org/ckfinder/userfiles/files/get-free-spins-link-in-coin-master_GM406889139.pdfIn PDF document text
    • http://sarny-rada.org/ckfinder/userfiles/files/minecraft-free-version-pc_GM479516143.pdfIn PDF document text
    • http://sarny-rada.org/ckfinder/userfiles/files/free-roblox-outfits_GM431946152.pdfIn PDF document text
    • http://sarny-rada.org/ckfinder/userfiles/files/free-minecraft-java-code_GM479516143.pdfIn PDF document text
    • http://sarny-rada.org/ckfinder/userfiles/files/minecraft-free-download-mac-full-version-2021_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_off00002e63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E63 22508 bytes
SHA-256: 4bc312efa4a54a432abe734b9847d25ac30e871f15d8e9210db167eac5bc5e30
font_01_sfnt_off00006090.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6090 19188 bytes
SHA-256: a8f681c18c5380531c3743548279ef24b074491e5ef3cbdd9afbc7b3c7c74193

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