Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8b3dc0ab5286bb2…

MALICIOUS

PDF

33.2 KB Created: 2021-06-17 16:32:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 404a6b8a60bc04615d628ce5e2f4ed62 SHA-1: 58db169b752b5127c30510cc523cd61a5253d996 SHA-256: f8b3dc0ab5286bb21e4803f92a29cc272620c521c2c267eca0feb60bafd04d52
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to websites offering game hacks and generators, with a primary redirector identified as malicious. The document body and heuristics indicate a lure for free in-game currency or cheats for popular games like Roblox and Coin Master. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the lures suggest a phishing or redirection attack designed to lead users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.co/app/431946152/roblox-hack-flz-game-hack In PDF document text
    • http://lib.fisipumt.ac.id//repository/pokemon-go-free-coins-no-survey_GM1094591345.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/free-google-play-promo-codes-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/free-domain-for-minecraft-server_GM479516143.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/coin-master-game-hacks_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/how-to-hack-someones-roblox-account_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/roblox-cruise-ship-tyccon-albatros-free-script_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/how-to-make-a-minecraft-client_GM479516143.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/coin-master-daily-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/free-roblox-map_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/robux-generator-com_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/roblox-booga-booga-hack_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/coin-master-free-spins-generator-no-verification_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/robux-free-com_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/free-robux-easy_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/coin-master-hack-apk-with-fb-login_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/robuxhub-net_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/free-spins-coins-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/free-robux-come_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/how-to-hack-in-roblox-prison-life_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/free-roblox-usernames-and-passwords_GM431946152.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_off00002d47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D47 21792 bytes
SHA-256: 808a22764fea5007726e9374d295249a9fdd0ac4312bf3c8ea868432b33e3b67
font_01_sfnt_off00005d34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D34 18904 bytes
SHA-256: 6e69bd34d4310ac0f2e597700d55397a2de084dce5cb34a7dc179750558c5053

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