Malicious PDF — malware analysis report

Static analysis result for SHA-256 47174209da05627c…

MALICIOUS

PDF

45.0 KB Created: 2021-06-03 16:30:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 64dd07bc21fef7b62f4bd3c53e8dcb21 SHA-1: 26ff44cae4278632ea1641628ccc12316b9945b4 SHA-256: 47174209da05627c8ddc45e3dacb3df469605f1a0f98e7b36e22ebd75edd27c8
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple heuristics indicating it's a malicious redirector lure, specifically targeting users interested in game hacks and free spins. The embedded URL leads to known malicious infrastructure. The document body, though heavily obfuscated, contains references to the same URL, reinforcing the lure.

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/406889139/how-to-get-free-spins-for-coin-master-game-hack In PDF document text
    • https://www.andrology.co.uk/uploads/files/files/can-you-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://www.andrology.co.uk/uploads/files/files/free-printable-roblox-images_GM431946152.pdfIn PDF document text
    • https://www.andrology.co.uk/uploads/files/files/girl-roblox-avatar_GM431946152.pdfIn PDF document text
    • https://www.andrology.co.uk/uploads/files/files/robux-free-com_GM431946152.pdfIn PDF document text
    • https://www.andrology.co.uk/uploads/files/files/how-to-get-20210-robux-for-free_GM431946152.pdfIn PDF document text
    • https://www.andrology.co.uk/uploads/files/files/robux-hack-generator_GM431946152.pdfIn PDF document text
    • https://www.andrology.co.uk/uploads/files/files/minecraft-java-edition-free_GM479516143.pdfIn PDF document text
    • https://www.andrology.co.uk/uploads/files/files/tiktok-free-followers-and-likes-apk_GM835599320.pdfIn PDF document text
    • https://www.andrology.co.uk/uploads/files/files/robux-fun-hack_GM431946152.pdfIn PDF document text
    • https://www.andrology.co.uk/uploads/files/files/coin-master-hacksco_GM406889139.pdfIn PDF document text
    • https://www.andrology.co.uk/uploads/files/files/sites-for-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://www.andrology.co.uk/uploads/files/files/free-tiktok-likes-2021_GM835599320.pdfIn PDF document text
    • https://www.andrology.co.uk/uploads/files/files/hey-google-how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.andrology.co.uk/uploads/files/files/www-free-robux_GM431946152.pdfIn PDF document text
    • https://www.andrology.co.uk/uploads/files/files/how-to-hack-roblox-2021_GM431946152.pdfIn PDF document text
    • https://www.andrology.co.uk/uploads/files/files/how-to-hack-people-on-roblox_GM431946152.pdfIn PDF document text
    • https://www.andrology.co.uk/uploads/files/files/coin-master-hack-tool-pc_GM406889139.pdfIn PDF document text
    • https://www.andrology.co.uk/uploads/files/files/can-you-get-robux-for-free_GM431946152.pdfIn PDF document text
    • https://www.andrology.co.uk/uploads/files/files/coin-master-free-coins_GM406889139.pdfIn PDF document text
    • https://www.andrology.co.uk/uploads/files/files/get-gold-coin-master-village-hack_GM406889139.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_off00005472.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5472 25880 bytes
SHA-256: 27189558b21df58962935aae8467a983788add2f2d0258e3373c9fa43b71279a
font_01_sfnt_off00008e31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E31 18052 bytes
SHA-256: 3cfae0e628493b06a11893ba870a091d0c1d4835c1ebffdd70b8f2a1c7d637a9

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