Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8bb8172be09e866…

MALICIOUS

PDF

44.7 KB Created: 2021-05-11 03:34:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-11
MD5: fdf89f3a633a90a3e006da8e4a07d6e2 SHA-1: 25261e4e879e2ce8e4741f754470e5a8a8f207ad SHA-256: a8bb8172be09e866ac6e82b0a61d20fc3238f2cf8be488c33b50a2d96a2fd982
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are part of a link farm designed to attract users with lures for game hacks and free currency. The presence of a malicious redirector URL and the ML classifier's high confidence score indicate a malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to potentially malicious content or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9632

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 https://netcdn.xyz/app/406889139/coin-master-hack-pro-gamers-game-hack In PDF document text
    • http://roxe2banh.com/public/upload/files/coin-master-free-spins-for-iphone_GM406889139.pdfIn PDF document text
    • http://roxe2banh.com/public/upload/files/free-spin-coin-master-2021-link_GM406889139.pdfIn PDF document text
    • http://roxe2banh.com/public/upload/files/coin-master-hack-no-human-verification-2021_GM406889139.pdfIn PDF document text
    • http://roxe2banh.com/public/upload/files/free-robux-codes-2021-not-used_GM431946152.pdfIn PDF document text
    • http://roxe2banh.com/public/upload/files/roblox-free-robux-website_GM431946152.pdfIn PDF document text
    • http://roxe2banh.com/public/upload/files/free-robux-giveaway_GM431946152.pdfIn PDF document text
    • http://roxe2banh.com/public/upload/files/roblox-executor-free-download_GM431946152.pdfIn PDF document text
    • http://roxe2banh.com/public/upload/files/roblox-games-with-free-vip-servers_GM431946152.pdfIn PDF document text
    • http://roxe2banh.com/public/upload/files/coin-master-free-spins-link-today_GM406889139.pdfIn PDF document text
    • http://roxe2banh.com/public/upload/files/coin-master-free-coins-and-spins_GM406889139.pdfIn PDF document text
    • http://roxe2banh.com/public/upload/files/how-to-get-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • http://roxe2banh.com/public/upload/files/how-do-u-hack-roblox_GM431946152.pdfIn PDF document text
    • http://roxe2banh.com/public/upload/files/free-robux-codes-generator-no-verification_GM431946152.pdfIn PDF document text
    • http://roxe2banh.com/public/upload/files/roblox-com-hack_GM431946152.pdfIn PDF document text
    • http://roxe2banh.com/public/upload/files/how-to-make-a-minecraft-bedrock-server-for-free_GM479516143.pdfIn PDF document text
    • http://roxe2banh.com/public/upload/files/minecraft-pocket-edition-free_GM479516143.pdfIn PDF document text
    • http://roxe2banh.com/public/upload/files/best-minecraft-hacked-client_GM479516143.pdfIn PDF document text
    • http://roxe2banh.com/public/upload/files/how-to-get-free-robux-for-free_GM431946152.pdfIn PDF document text
    • http://roxe2banh.com/public/upload/files/coin-master-hack-tool-v1-9-download-free_GM406889139.pdfIn PDF document text
    • http://roxe2banh.com/public/upload/files/free-robux-generator-no-survey_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004b48.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B48 24364 bytes
SHA-256: fc362900d12f5ca8d2f23bd283de0c9d613c0caed0bc49d533f9e03708d62294
font_01_sfnt_off000082fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x82FE 2840 bytes
SHA-256: 3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676
font_02_sfnt_off00008caf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8CAF 18132 bytes
SHA-256: 7c3ba000fcc9e82367a9cf09e7428e48624a936725f215f3086fe1b405a0b7f2

Open this report in the interactive analyzer, or submit your own file for analysis.