Malicious PDF — malware analysis report

Static analysis result for SHA-256 f834fcb533cd8a3d…

MALICIOUS

PDF

47.4 KB Created: 2021-06-03 08:02:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: b19ac51358e3939c29c6fadaee47f40c SHA-1: 2ace62a68ff7e02e8736366b2445f28f65883904 SHA-256: f834fcb533cd8a3d128826dd5d2899baf4663b20f9e4e4500bbaf0d8ffc6610d
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links, including one identified as a malicious redirector, leading to sites offering game hacks and currency. The document body text and embedded URLs strongly suggest a lure for users seeking in-game advantages, which is a common social engineering tactic. The primary malicious URL is https://netcdn.online/app/406889139/how-to-get-free-gold-cards-on-coin-master-game-hack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9832

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-gold-cards-on-coin-master-game-hack In PDF document text
    • http://libnh.stikesnh.ac.id/repository/roblox-game-free-download_GM431946152.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/coin-master-online-hack-download_GM406889139.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/how-to-make-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/coin-master-card-hack-2021_GM406889139.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/robux-redeem_GM431946152.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/free-robux-link_GM431946152.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/hacks-for-minecraft-bedrock_GM479516143.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/daily-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/facebook-coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/free-vip-server-roblox_GM431946152.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/free-minecraft-pe-server_GM479516143.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/coin-master-free-spin-and-coins-links_GM406889139.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/minecraft-free-ios_GM479516143.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/free-roblox-codes_GM431946152.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/roblox-booga-booga-hack_GM431946152.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/hack-to-protect-village-on-coin-master_GM406889139.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/free-roblox-adopt-me-pets_GM431946152.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/roblox-how-to-make-clothes-for-free_GM431946152.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/free-coin-master-spin-app_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_off0000523e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x523E 30984 bytes
SHA-256: 6dc6b683af15e4043366306215cefc4eb7ab48fe081667d3cab8895806b029dd
font_01_sfnt_off0000979d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x979D 18120 bytes
SHA-256: 85f8eff0e5be39dd6e757275040d7635a401f73e30a8ce7b7e853b4f47487c02

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