Malicious PDF — malware analysis report

Static analysis result for SHA-256 67bb94eb660c94d4…

MALICIOUS

PDF

35.4 KB Created: 2021-07-06 21:50:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 39450a867399af022fd198653808de17 SHA-1: 87acf184cad45a55588203c4234c21f3a4e0e2ed SHA-256: 67bb94eb660c94d44f5a0033c4d28ad0cd52f6e7185a561d053dc8f8b5aa6164
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links to external sites, including a primary redirector URL associated with malicious activity. The document body and heuristics indicate a lure for game hacks and generators, likely to trick users into visiting malicious sites or downloading further malware. The presence of multiple PDF links suggests a link farm or SEO manipulation tactic to distribute the malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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.
  • 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.
  • 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/moon-static-coin-master-generator-hacks-free-game-hack In PDF document text
    • http://ggmtc.net/userfiles/files/how-to-make-clothes-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://ggmtc.net/userfiles/files/coin-master-invite-friends-hack_GM406889139.pdfIn PDF document text
    • http://ggmtc.net/userfiles/files/coin-master-free-download-pc_GM406889139.pdfIn PDF document text
    • http://ggmtc.net/userfiles/files/coin-master-reward-link_GM406889139.pdfIn PDF document text
    • http://ggmtc.net/userfiles/files/how-to-get-free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • http://ggmtc.net/userfiles/files/how-to-get-free-robux-on-roblox-promo-code_GM431946152.pdfIn PDF document text
    • http://ggmtc.net/userfiles/files/what-do-points-do-in-roblox_GM431946152.pdfIn PDF document text
    • http://ggmtc.net/userfiles/files/we-wil-giv-bak-the-bux-yo-roblox-april-hacked_GM431946152.pdfIn PDF document text
    • http://ggmtc.net/userfiles/files/coin-master-hack-xyz-download-free_GM406889139.pdfIn PDF document text
    • http://ggmtc.net/userfiles/files/free-robux-2021_GM431946152.pdfIn PDF document text
    • http://ggmtc.net/userfiles/files/roblox-free-clothes-generator_GM431946152.pdfIn PDF document text
    • http://ggmtc.net/userfiles/files/how-to-do-speed-hack-in-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • http://ggmtc.net/userfiles/files/how-to-hack-coins-in-archery-master-3d_GM406889139.pdfIn PDF document text
    • http://ggmtc.net/userfiles/files/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://ggmtc.net/userfiles/files/coin-master-spin-hack-pc_GM406889139.pdfIn PDF document text
    • http://ggmtc.net/userfiles/files/robux-hack_GM431946152.pdfIn PDF document text
    • http://ggmtc.net/userfiles/files/roblox-speed-hack_GM431946152.pdfIn PDF document text
    • http://ggmtc.net/userfiles/files/free-robux-generator-2021-real_GM431946152.pdfIn PDF document text
    • http://ggmtc.net/userfiles/files/robux-robux_GM431946152.pdfIn PDF document text
    • http://ggmtc.net/userfiles/files/android-coin-master-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
font_00_sfnt_off0000336e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x336E 23468 bytes
SHA-256: 802a50bc30a4e59c25dcd40f8ff0f54c5186a9487a5fbb122b47a0a52dc1c307
font_01_sfnt_off00006838.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6838 18168 bytes
SHA-256: 480988a8bf3c5888bd5ebbfc15eb41d8e157e9bfee1c85e44027bf0723b89683

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