Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d00b79d38d83c83…

MALICIOUS

PDF

33.0 KB Created: 2021-07-06 12:38:18 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: c5676eb4ef1fc1de566626c5cfac602d SHA-1: 744db36a4cbac75bb7cadeb4d6a2789a1a47c578 SHA-256: 2d00b79d38d83c832ed558b472d72fc476176541d45d2c00400210087eb97011
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple lures for game hacks and generators, directing users to a link farm of other PDFs. This behavior is indicative of a traffic-driving or content-hosting scheme, potentially for malware distribution or ad fraud. The ML classifier strongly flagged this PDF as malicious, and the presence of numerous external links supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/479516143/minecraft-free-computer-game-game-hack PDF link annotation
    • https://allhimalayantreks.com/userfiles/files/minecraft-hacked-client_GM479516143.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/how-to-get-free-in-catalog-roblox_GM431946152.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/how-can-i-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/how-to-get-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/coin-master-golden-card-hack_GM406889139.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/robloxfun-com-generator_GM431946152.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/roblox-hacked-version_GM431946152.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/mcmaster-club-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/free-robux-generator-for-kids_GM431946152.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/roblox-hack-ios_GM431946152.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/minecraft-java-free_GM479516143.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/coin-master-free-spin-and-coins-links-2021_GM406889139.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/free-roblox-passwords_GM431946152.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/free-robux-no-human-verification-for-android_GM431946152.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/minecraft-116-free_GM479516143.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/www-roblox-com-robux-free_GM431946152.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/hacks-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/mangocheats-com-hack-coin-master-cheat_GM406889139.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/can-u-get-free-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_002_off00002c92.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2C92 22240 bytes
SHA-256: 3f481eb64fa3f1350945881100598a3bc4e3985449ba0c43d0d873c05b97bd60
font_01_sfnt_off00005d9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D9C 18576 bytes
SHA-256: c3858ab9c93ee0d54086a54cbca57519016d4b26ff41f14ee4df921336ab6e95

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