Malicious PDF — malware analysis report

Static analysis result for SHA-256 9fe2a42fa9d0dfb7…

MALICIOUS

PDF

45.8 KB Created: 2021-06-11 07:01:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 56fab97da31270d1e0ac35d328e08091 SHA-1: 49a70a9c958d76d656c6ffc38b0e88b44548da32 SHA-256: 9fe2a42fa9d0dfb7d61ea0461ac4882d6067aab79f0907bddfdc394d0b3fa502
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, including a known malicious redirector, under the guise of game hacks and free generators. The document body, though heavily obfuscated, contains references to these lures and the associated URLs. This indicates a likely phishing or malware distribution attempt, leveraging social engineering to trick users into clicking malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

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 https://netcdn.tw/app/431946152/how-to-use-cheat-engine-on-roblox-without-shutdown-2021-game-hack In PDF document text
    • http://library.forda-mof.org/katalog/repository/roblox-cheats-for-free-builders-club_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/how-to-get-gold-cards-on-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/roblox-jailbreak-cheats-2021_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/free-ways-to-get-robux_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/huskybuckscom-free-robux_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/get-free-spins-on-coin-master-links_GM406889139.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/roblox-lego-hacking-script_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/coin-master-free-coins-link_GM406889139.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/ways-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/how-do-you-download-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/coin-master-hack-without-human-verification-2021_GM406889139.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/minecraft-free-edition_GM479516143.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/cmaster-club-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/how-to-get-free-robux-on-ipad_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/roblox-hack-codes_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/get-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/roblox-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/roblox-hacks-2021_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/coin-master-free-spins-facebook_GM406889139.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/hack-spin-coin-master_GM406889139.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
stream_004_off00005334.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5334 24348 bytes
SHA-256: 19006898fcf572ae59560546a8c8f3b9db660e547702a22687546e68f4ae5dcd
font_01_sfnt_off00008b5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B5D 19952 bytes
SHA-256: c92e1c9639d6fb0492b8a681b37bb7c57123a1e0d6c1e6351a617f57bfeafd08

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