Malicious PDF — malware analysis report

Static analysis result for SHA-256 75a02375a70a527c…

MALICIOUS

PDF

34.9 KB Created: 2021-07-06 11:17:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 477c861dc85f6f9d16d96c659e434f86 SHA-1: ecea36cb97df1d2289ed1a79bf95ae7536aadb8f SHA-256: 75a02375a70a527c20e4237b33e9819f5c43ac2fe5bc8655493ba4c0ba1fbaa9
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure of free game currency and hacks to entice users. It contains numerous links to external PDFs and a primary link to a known malicious redirector at http://netcdn.tw/app/406889139/master-coin-hack-mod-game-hack. The document body, though partially garbled, reinforces the theme of game hacks and includes many of the same URLs found in the heuristics. The presence of multiple PDF links and a redirector suggests an attempt to lead the user to further malicious content or downloads.

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/master-coin-hack-mod-game-hack In PDF document text
    • http://perpustakaan-stikesmsb.com/repository/how-to-get-free-ro-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan-stikesmsb.com/repository/free-robux-without-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan-stikesmsb.com/repository/how-to-hack-coin-master-facebook_GM406889139.pdfIn PDF document text
    • http://perpustakaan-stikesmsb.com/repository/roblox-free-admin-how-spawn-monster_GM431946152.pdfIn PDF document text
    • http://perpustakaan-stikesmsb.com/repository/roblox-hack-clients-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan-stikesmsb.com/repository/roblox-apocalypse-rising-hack_GM431946152.pdfIn PDF document text
    • http://perpustakaan-stikesmsb.com/repository/real-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://perpustakaan-stikesmsb.com/repository/coin-master-free-spins-app_GM406889139.pdfIn PDF document text
    • http://perpustakaan-stikesmsb.com/repository/download-roblox-clothes-free-online_GM431946152.pdfIn PDF document text
    • http://perpustakaan-stikesmsb.com/repository/legit-robux-cheat-hack_GM431946152.pdfIn PDF document text
    • http://perpustakaan-stikesmsb.com/repository/hacks-for-jailbreak-beta-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan-stikesmsb.com/repository/doge-roblox-free_GM431946152.pdfIn PDF document text
    • http://perpustakaan-stikesmsb.com/repository/roblox-cheats-for-robux-and-tix-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan-stikesmsb.com/repository/free-good-account-on-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan-stikesmsb.com/repository/minecraft-hack-client-download_GM479516143.pdfIn PDF document text
    • http://perpustakaan-stikesmsb.com/repository/change-the-amount-of-anything-on-roblox-hack_GM431946152.pdfIn PDF document text
    • http://perpustakaan-stikesmsb.com/repository/how-to-noclip-in-roblox-with-cheat-engine-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan-stikesmsb.com/repository/how-to-get-free-robux-for-kids_GM431946152.pdfIn PDF document text
    • http://perpustakaan-stikesmsb.com/repository/notoriety-roblox-shadow-raid-secret-cheat_GM431946152.pdfIn PDF document text
    • http://perpustakaan-stikesmsb.com/repository/roblox-hack-btools-2021_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000031c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31C9 23188 bytes
SHA-256: 2a6996df6737ce1bffbb98c3f510a3d7e5e94188b981fac7c36d43d43696b436
font_01_sfnt_off0000661f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x661F 18180 bytes
SHA-256: ed04b551d40dc3d0b078bebd4df0367427dce1de22e506577ff87439cc2ad0e8

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