Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4efdb08ce7a72e6…

MALICIOUS

PDF

48.7 KB Created: 2021-06-07 06:38:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 82557e5b6afccf5ad1a196ee411616e7 SHA-1: 6c75514cf5ca49c1fcebd20452fd148040e3b8ef SHA-256: e4efdb08ce7a72e6c2043ba23c5219554ad41d6d59c16c987b8f82a655f65ab6
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to known malicious redirectors, disguised as 'free generator' or 'game hack' lures. The primary link directs users to 'https://netcdn.tw/app/431946152/how-to-get-free-robux-not-fake-2021-game-hack', which is likely intended to lead to a further download or exploit. No scripts were extracted, but the document's structure and embedded URLs strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

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.tw/app/431946152/how-to-get-free-robux-not-fake-2021-game-hack In PDF document text
    • https://hundt-druck.de/wp-content/uploads/fsqm-files/how-to-get-free-robux-2021-nofake_GM431946152.pdfIn PDF document text
    • https://hundt-druck.de/wp-content/uploads/fsqm-files/how-to-get-minecraft-java-edition-for-free_GM479516143.pdfIn PDF document text
    • https://hundt-druck.de/wp-content/uploads/fsqm-files/dms-cheats-roblox_GM431946152.pdfIn PDF document text
    • https://hundt-druck.de/wp-content/uploads/fsqm-files/how-to-hack-into-a-full-server-on-roblox_GM431946152.pdfIn PDF document text
    • https://hundt-druck.de/wp-content/uploads/fsqm-files/cardcodepw-free-robux_GM431946152.pdfIn PDF document text
    • https://hundt-druck.de/wp-content/uploads/fsqm-files/how-to-get-free-robux-without-verification-or-surveys_GM431946152.pdfIn PDF document text
    • https://hundt-druck.de/wp-content/uploads/fsqm-files/roblox-its-free-trailer_GM431946152.pdfIn PDF document text
    • https://hundt-druck.de/wp-content/uploads/fsqm-files/real-free-robux-codes_GM431946152.pdfIn PDF document text
    • https://hundt-druck.de/wp-content/uploads/fsqm-files/how-to-get-free-robux-with-guddinfo_GM431946152.pdfIn PDF document text
    • https://hundt-druck.de/wp-content/uploads/fsqm-files/roblox-summoner-tycoon-cheats_GM431946152.pdfIn PDF document text
    • https://hundt-druck.de/wp-content/uploads/fsqm-files/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://hundt-druck.de/wp-content/uploads/fsqm-files/roblox-free-robux-tampermonkey_GM431946152.pdfIn PDF document text
    • https://hundt-druck.de/wp-content/uploads/fsqm-files/free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • https://hundt-druck.de/wp-content/uploads/fsqm-files/coin-master-free-spins-blogspot_GM406889139.pdfIn PDF document text
    • https://hundt-druck.de/wp-content/uploads/fsqm-files/how-to-get-free-gamepasses-on-roblox-2021-pastebim_GM431946152.pdfIn PDF document text
    • https://hundt-druck.de/wp-content/uploads/fsqm-files/acount-hacking-roblox_GM431946152.pdfIn PDF document text
    • https://hundt-druck.de/wp-content/uploads/fsqm-files/master-coin-free-spin_GM406889139.pdfIn PDF document text
    • https://hundt-druck.de/wp-content/uploads/fsqm-files/give-me-free-robux_GM431946152.pdfIn PDF document text
    • https://hundt-druck.de/wp-content/uploads/fsqm-files/minecraft-java-edition-redeem-code-free-2021_GM479516143.pdfIn PDF document text
    • https://hundt-druck.de/wp-content/uploads/fsqm-files/wwwrobux-hacks_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0000517b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x517B 26260 bytes
SHA-256: e54fb977aa4c248687b2332b1d966f5017bd989d6f205fded678f198f1d3ff1d
font_01_sfnt_off00008f3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F3B 2880 bytes
SHA-256: 552e62132cae3603ce0819827e44d96a992bd06014cc5080bf3af4b2ea155b3e
font_02_sfnt_off00009913.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9913 19084 bytes
SHA-256: 916495f412af3a4ed63237fa53d46c4e4bfd3a3dbd1e6dcd8d8a323d4093a8e7

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