Malicious PDF — malware analysis report

Static analysis result for SHA-256 a9dea054ec9b848c…

MALICIOUS

PDF

44.3 KB Created: 2021-05-11 00:31:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 9b68d7e3c22ea5e716e8fb433e84d5ed SHA-1: 504c1025e55782aa355283f4b4e1822bc8d97579 SHA-256: a9dea054ec9b848c2c30ebe7de7d972538b732ec4a3b7ca9add8b5f08dc410ff
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains links that lead to a known malicious redirector, disguised as a game hack generator. The document body and embedded links suggest a lure for free game currency, likely to trick users into visiting malicious sites. While no scripts were explicitly extracted, the PDF structure and heuristic firings indicate malicious redirection and potential for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9648

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/406889139/coin-master-free-coins-and-spins-app-game-hack In PDF document text
    • http://www.imwd.it/images/coin-master-gold-cards-free_GM406889139.pdfIn PDF document text
    • http://www.imwd.it/images/claim-free-robux-button_GM431946152.pdfIn PDF document text
    • http://www.imwd.it/images/minecraft-java-free-download_GM479516143.pdfIn PDF document text
    • http://www.imwd.it/images/free-domain-for-minecraft-server_GM479516143.pdfIn PDF document text
    • http://www.imwd.it/images/roblox-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://www.imwd.it/images/real-robux_GM431946152.pdfIn PDF document text
    • http://www.imwd.it/images/roblox-weird_GM431946152.pdfIn PDF document text
    • http://www.imwd.it/images/how-to-get-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://www.imwd.it/images/how-to-get-minecraft-for-free-on-mac_GM479516143.pdfIn PDF document text
    • http://www.imwd.it/images/coin-master-hack-tuts_GM406889139.pdfIn PDF document text
    • http://www.imwd.it/images/is-minecraft-education-edition-free_GM479516143.pdfIn PDF document text
    • http://www.imwd.it/images/free-robux-without-offers_GM431946152.pdfIn PDF document text
    • http://www.imwd.it/images/how-to-get-free-robux-easy-no-download_GM431946152.pdfIn PDF document text
    • http://www.imwd.it/images/daily-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://www.imwd.it/images/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://www.imwd.it/images/coin-master-free-cards-link-2021_GM406889139.pdfIn PDF document text
    • http://www.imwd.it/images/free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://www.imwd.it/images/blogger-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://www.imwd.it/images/minecraft-free-download-mac_GM479516143.pdfIn PDF document text
    • http://www.imwd.it/images/minecraft-world-free-download_GM479516143.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_003_off000047e2.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x47E2 25408 bytes
SHA-256: 40c3f6887065597ddabc0c400c0101b8128af723cc82c2b891220c61527cce3e
font_01_sfnt_off00008133.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8133 2944 bytes
SHA-256: fcfcd28869b8d6c7503d63ed8d48371ec5b580fea2733193e2acbb82b3d30a76
font_02_sfnt_off00008b5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B5E 18060 bytes
SHA-256: f77ee24e01944806ea28e16fd73427a54f7109e241804df06ce657d8c6d11cfb

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