Malicious PDF — malware analysis report

Static analysis result for SHA-256 db6d9845faadf49e…

MALICIOUS

PDF

32.5 KB Created: 2021-07-04 20:25:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 6cc26071c88e2174ee505bf5a9dcf100 SHA-1: 72dc2ba03e8474a2a6909ef2fce6ada632b9b65c SHA-256: db6d9845faadf49ebb11df0c12230f09b1e191912b69563decc56cfee3a80702
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains lures for game hacks and free currency, directing users to a known malicious redirector. The document body and embedded URLs suggest a social engineering tactic to trick users into visiting malicious sites. Although no scripts were explicitly extracted, the PDF format can embed JavaScript, and the heuristic firings indicate malicious redirection and lure behavior.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9824

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.tw/app/431946152/how-to-hack-roblox-game-hack In PDF document text
    • http://perpus.unpam.ac.id/repository/free-robux-group_GM431946152.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/click-here-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/minecraft-java-edition-free-code_GM479516143.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/robux-matchcomfree-robux_GM431946152.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/extra-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/freespins-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/coin-master-how-to-get-free-pet-food_GM406889139.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/blox-land-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/coin-master-daily-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/free-robux-picture_GM431946152.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/pubg-uc-carding-website_GM1330123889.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/coin-master-apk-hack-2021_GM406889139.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/roblox-hack-unlimited-robux_GM431946152.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/noclip-hack-on-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/minecraft-bedrock-hacks_GM479516143.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/games-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/ac-market-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/coin-master-free-spin-and-coin-links_GM406889139.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/free-roblox-gams_GM431946152.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/roblox-hack-no-verification-or-survey-or-download_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_off000029c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x29C4 22152 bytes
SHA-256: fa25c5db93d99ad8e87a1b1ab1f7ba1cbfe26ae33d355766262dd27a0e719c43
font_01_sfnt_off00005aa6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5AA6 18820 bytes
SHA-256: bc289db47467c627b75bad478044969f7c78c51a6f1934d82e9e517bf2978efd

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