Malicious PDF — malware analysis report

Static analysis result for SHA-256 9986458b692780b7…

MALICIOUS

PDF

42.3 KB Created: 2021-05-16 15:03:20 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-11
MD5: a2aec3d2b6517424e7cac64bd46e6faa SHA-1: 5097663242fb6a6e19d32415d29900111303bafd SHA-256: 9986458b692780b793c9b2e1a538de26bc5fe795ac6bce01b8993018c16ed514
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, specifically disguised as 'free generator' or 'game hack' lures for popular games like Minecraft and Roblox. The document body and embedded URLs confirm this phishing pretext, aiming to trick users into clicking through to potentially malicious sites. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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.xyz/app/479516143/minecraft-mac-free-game-hack In PDF document text
    • http://www.dcgsrl.it/images/get-free-robux-gg_GM431946152.pdfIn PDF document text
    • http://www.dcgsrl.it/images/free-robux-hack-generator_GM431946152.pdfIn PDF document text
    • http://www.dcgsrl.it/images/how-to-get-free-robux-hack_GM431946152.pdfIn PDF document text
    • http://www.dcgsrl.it/images/roblox-cheat-codes_GM431946152.pdfIn PDF document text
    • http://www.dcgsrl.it/images/freespinandcoin_GM406889139.pdfIn PDF document text
    • http://www.dcgsrl.it/images/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://www.dcgsrl.it/images/claim-robux_GM431946152.pdfIn PDF document text
    • http://www.dcgsrl.it/images/earn-free-robux_GM431946152.pdfIn PDF document text
    • http://www.dcgsrl.it/images/coin-master-hack-lost-world-2021_GM406889139.pdfIn PDF document text
    • http://www.dcgsrl.it/images/free-robux-download_GM431946152.pdfIn PDF document text
    • http://www.dcgsrl.it/images/how-to-get-minecraft-for-free-on-ps4-2021_GM479516143.pdfIn PDF document text
    • http://www.dcgsrl.it/images/i-need-robux_GM431946152.pdfIn PDF document text
    • http://www.dcgsrl.it/images/500-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://www.dcgsrl.it/images/static-moonactive-net-link_GM406889139.pdfIn PDF document text
    • http://www.dcgsrl.it/images/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://www.dcgsrl.it/images/how-can-i-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://www.dcgsrl.it/images/how-to-get-free-cards-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.dcgsrl.it/images/coin-master-daily-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • http://www.dcgsrl.it/images/how-to-get-free-spins-on-coin-master-without-verification_GM406889139.pdfIn PDF document text
    • http://www.dcgsrl.it/images/coin-master-free-spins-2021_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_003_off0000480d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x480D 27992 bytes
SHA-256: fc7089c136476c8a92790a5d2526cc514c8c20cf9727f7edb82b11c69e1afd72
font_01_sfnt_off00008551.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8551 17568 bytes
SHA-256: 2778e064ee8e4e3a4bd3984a17bb7eaaeefaa41a67eb131b8ade69fe1653bbfc

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