Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6872950cbd0cf46…

MALICIOUS

PDF

35.3 KB Created: 2021-07-03 16:11:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 81729101cbfa51977490055a1f44b576 SHA-1: b0bd917ea938720c3ba2c1c3141c048745e50d83 SHA-256: f6872950cbd0cf464815463ce0aad6ece3ed5a74876e2a1295e10f6d145dac75
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting game hacks and free currency. The heuristic firings indicate that the document links to a known malicious redirector and uses a lure for game hacks. While no scripts were extracted, the embedded URLs and the nature of the lures suggest an attempt to trick the user into visiting a site that likely hosts further malware or phishing 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/get-free-spins-coin-master-game-hack In PDF document text
    • http://digilib.unbari.ac.id/repository/roblox-shinobi-life-hack-2021_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/coin-master-hack-online-2021_GM406889139.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/how-can-i-get-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/free-robux-codes-generator_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/link-for-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/roblox-mm2-coin-hack_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/free-roblox-toys_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/master-8-ball-pool-free-coins_GM406889139.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/how-to-add-cheats-to-a-roblox-game_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/how-to-get-free-robux-in-roblox-no-download_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/robloxheroxyz-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/how-to-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/how-to-make-your-own-free-robux-hack_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/moonactive-coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/free-spins-on-coin-master-game_GM406889139.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/minecraft-free-ios-2021_GM479516143.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/how-to-hack-someones-roblox-account-2021_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/robux-for-free-no-password_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/cheat-roblox-pass-thought-the-wall_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/how-to-get-minecraft-bedrock-edition-for-free_GM479516143.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
font_00_sfnt_off000033c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x33C5 23116 bytes
SHA-256: c6aa9d00d97cef7bce43f18a0a2c2c537220139ac2dd6df0407b1f78fb0d9a5c
font_01_sfnt_off000067e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x67E9 18176 bytes
SHA-256: 4615fa8d24c7ab701dc83bbe602e927cac2a2c7f7d4d6f21c8af2f2227b09e12

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