Malicious PDF — malware analysis report

Static analysis result for SHA-256 a6b5b7c3130e6c0e…

MALICIOUS

PDF

34.5 KB Created: 2021-07-01 16:08:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 5d1bc6430f4e0ac22689186691ce9f1b SHA-1: 021b47690c438c8f09922244079f783194fe9d7b SHA-256: a6b5b7c3130e6c0ef1a9d636b8d047941e8b07250ebd8c3cd1d241ae8bd29849
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs that lead to known malicious redirectors, specifically advertising game hacks and free currency for popular games like Roblox and Coin Master. The heuristic firings confirm the presence of malicious redirector links and a lure for game hacks. The document body, though partially obfuscated, also contains references to these lures and URLs, reinforcing the phishing and redirection attack pattern.

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.co/app/431946152/roblox-hack-day-game-hack In PDF document text
    • https://tena-g.hr/files/20-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://www.tena-g.hr/files/minecraft-diamond-finder-hack_GM479516143.pdfIn PDF document text
    • https://www.tena-g.hr/files/auxs-roblox-hack-pack_GM431946152.pdfIn PDF document text
    • https://tena-g.hr/files/free-robux-place_GM431946152.pdfIn PDF document text
    • https://tena-g.hr/files/me-hackearon-roblox_GM431946152.pdfIn PDF document text
    • https://tena-g.hr/files/blogspot-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://www.tena-g.hr/files/play-minecraft-online-free_GM479516143.pdfIn PDF document text
    • https://www.tena-g.hr/files/coin-master-free-coins-and-spins-link_GM406889139.pdfIn PDF document text
    • https://tena-g.hr/files/coin-master_GM406889139.pdfIn PDF document text
    • https://tena-g.hr/files/how-to-hack-roblox-account-2021-easy_GM431946152.pdfIn PDF document text
    • https://tena-g.hr/files/minecraft-world-free-download_GM479516143.pdfIn PDF document text
    • https://tena-g.hr/files/is-there-a-way-to-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://www.tena-g.hr/files/where-to-get-robux_GM431946152.pdfIn PDF document text
    • https://www.tena-g.hr/files/roblox-hack-tool_GM431946152.pdfIn PDF document text
    • https://www.tena-g.hr/files/roblox-free-robux-games-that-work-2021_GM431946152.pdfIn PDF document text
    • https://www.tena-g.hr/files/free-coins-and-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://tena-g.hr/files/how-to-hack-roblox-wanted_GM431946152.pdfIn PDF document text
    • https://tena-g.hr/files/free-spins-coin-master-october-13-2021_GM406889139.pdfIn PDF document text
    • https://www.tena-g.hr/files/roblox-free-t-shirt-2021_GM431946152.pdfIn PDF document text
    • https://tena-g.hr/files/minecraft-pe-hacks-ios_GM479516143.pdfIn PDF document text
    • https://www.roblox.com/.IIn 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_off00002f87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F87 22512 bytes
SHA-256: 7f8dfd85385bab46d18d5af2777e2eb2262c5c856bf3bd59a0f9d8d75a3090a4
font_01_sfnt_off0000619c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x619C 19004 bytes
SHA-256: 77cf96fe07aecc3423dc1ec150310cf640b733e7921278de56ceb907759e9815

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