Malicious PDF — malware analysis report

Static analysis result for SHA-256 3847244e36f3302f…

MALICIOUS

PDF

35.0 KB Created: 2021-06-25 07:03:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: e6fb0cbc6e9e9bc1658fd54d17207e9a SHA-1: cff8f51b713a39af98cb225b5bb4e3eada038774 SHA-256: 3847244e36f3302f774e459888eac36278d7889ce796bb536d6e4c923366c6e8
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including one that redirects to known malicious infrastructure. The document body and embedded links suggest a lure for game-related cheats or currency, which is a common social engineering tactic. The ML classifier also strongly indicated maliciousness. No scripts were extracted, but the presence of malicious redirectors and the lure pattern are sufficient indicators of a phishing or scam attempt.

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/can-i-get-a-hacked-roblox-account-back-without-email-game-hack In PDF document text
    • http://repository.unla.ac.id/repository/free-coins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/free-robux-no-verify_GM431946152.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/how-to-get-minecraft-for-free-on-laptop_GM479516143.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/free-robux-2021_GM431946152.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/roblox-free-robux-mod_GM431946152.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/how-to-get-free-robux-without-download-apps-or-survey_GM431946152.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/coin-master-hack-online-no-human-verification_GM406889139.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/coin-master-hack-spins-and-coins-unlimited-free_GM406889139.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/free-spin-coin-master-apk_GM406889139.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/minecraft-bedrock-edition-download-pc-free_GM479516143.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/roblox-free-robux-private-message_GM431946152.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/minecraft-bedrock-edition-pc-free_GM479516143.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/roblox-com-free-robux_GM431946152.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/coin-master-free-spin-ml_GM406889139.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/minecraft-cheats-pc-2021_GM479516143.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/aristois-minecraft-hack_GM479516143.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/plug-toolbox-for-minecraft-free-ios_GM479516143.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/how-to-get-free-robux-ios-and-pc-october_GM431946152.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/how-to-get-free-skins-in-minecraft_GM479516143.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/free-robux-co_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
font_00_sfnt_off00002ee5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2EE5 22720 bytes
SHA-256: 8782d68e56f08b953050a8046d61bd565f051c9387104e7dc1184755bad60485
font_01_sfnt_off000061bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61BF 19816 bytes
SHA-256: 1e3ca6c03dffe6521cc969deede950e8fbcf7f8c05a3ae3cbde9d6a085a57c8a

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