Malicious PDF — malware analysis report

Static analysis result for SHA-256 c94efe6357e1cbf0…

MALICIOUS

PDF

34.8 KB Created: 2021-07-09 14:37:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 6858b452817c39286d2729ef74ce23b7 SHA-1: 0fe1794b959fc9795eec41f9df03a1e8391497bc SHA-256: c94efe6357e1cbf0439f27547dab77515fc6d992e5acb111a037c4445cde4211
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for a game hack lure, directing users to a known malicious redirector. The document body also contains the same malicious URL, reinforcing the lure. While no scripts were extracted, the presence of embedded URLs and the specific heuristic strongly indicate a phishing attempt to redirect users to potentially malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/406889139/mcpe-master-hack-coins-game-hack In PDF document text
    • http://www.ma-plast.hr/files/howto-get-free-robux-new-2021_GM431946152.pdfIn PDF document text
    • http://www.ma-plast.hr/files/what-would-noobs-do-with-free-robux_GM431946152.pdfIn PDF document text
    • http://www.ma-plast.hr/files/robux-hack-tools_GM431946152.pdfIn PDF document text
    • https://www.ma-plast.hr/files/escape-prison-roblox-cheats_GM431946152.pdfIn PDF document text
    • http://www.ma-plast.hr/files/roblox-fly-hack_GM431946152.pdfIn PDF document text
    • http://www.ma-plast.hr/files/do-you-want-free-robux-get-unlimited-robux-for-free_GM431946152.pdfIn PDF document text
    • https://www.ma-plast.hr/files/how-to-hack-roblox-vehicle-simulator-using-cheat-engine_GM431946152.pdfIn PDF document text
    • https://www.ma-plast.hr/files/vpn-for-roblox-free_GM431946152.pdfIn PDF document text
    • http://www.ma-plast.hr/files/a-roblox-profile-have-russia-profile-free_GM431946152.pdfIn PDF document text
    • http://www.ma-plast.hr/files/free-modded-minecraft-server_GM479516143.pdfIn PDF document text
    • http://www.ma-plast.hr/files/robux-2021_GM431946152.pdfIn PDF document text
    • http://www.ma-plast.hr/files/roblox-prison-life-hack_GM431946152.pdfIn PDF document text
    • https://www.ma-plast.hr/files/earn-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.ma-plast.hr/files/blox-world-free-robux_GM431946152.pdfIn PDF document text
    • https://www.ma-plast.hr/files/robux-for-free-no-phone-apps_GM431946152.pdfIn PDF document text
    • http://www.ma-plast.hr/files/hacks-minecraft_GM479516143.pdfIn PDF document text
    • https://www.ma-plast.hr/files/microsoft-free-robux_GM431946152.pdfIn PDF document text
    • https://www.ma-plast.hr/files/tiktok-free-folowers-free_GM835599320.pdfIn PDF document text
    • https://www.ma-plast.hr/files/minecraft-hack-2021_GM479516143.pdfIn PDF document text
    • http://www.ma-plast.hr/files/cheat-names-for-roblox_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
stream_002_off000030fe.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x30FE 23292 bytes
SHA-256: 514c7d25efca0f17419e289b2764fb13ada59c94dd6645ec5c25b5b2aa027693
font_01_sfnt_off00006579.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6579 18180 bytes
SHA-256: 92faf3057dda85b96eed63f8c940eae00c44c914698dadd2c1d3c54ade9dde20

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