Malicious PDF — malware analysis report

Static analysis result for SHA-256 b64f32d46d20a695…

MALICIOUS

PDF

35.4 KB Created: 2021-07-05 14:41:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: b9d30d75fdd96c29b570dae722a4d4aa SHA-1: 6b33206e2f30806170b6c39b8b2fa02f0b5cea8a SHA-256: b64f32d46d20a69565a6931a74415e651fecf2d66ead471483f7af019d56ccbb
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including one to a known malicious redirector infrastructure at http://netcdn.tw/app/406889139/hack-version-of-coin-master-apk-download-game-hack. The document body and embedded URLs suggest a lure for game hacks or cheats, a common social engineering tactic. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the lure indicate a phishing attempt to redirect users to malicious sites.

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.tw/app/406889139/hack-version-of-coin-master-apk-download-game-hack In PDF document text
    • https://opac.umrah.ac.id/repository/hack-tener-muchos-diamantes-en-royale-high-roblox_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/impact-minecraft-hack_GM479516143.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/how-to-get-free-robux-in-meep-city_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/roblox-games-with-free-radio_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/free-minecraft-skins-girl_GM479516143.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/minecraft-ps4-code-free_GM479516143.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/how-to-hack-roblox-accounts-2021-april_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/free-coin-app_GM406889139.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/roblox-free-unlimited-robux-glitch_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/free-star-codes-roblox_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/how-to-hack-a-roblox-hacker_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/robux-for-offers_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/roblox-being-hacked_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/coin-master-new-link-free-spin_GM406889139.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/get-free-robux-by-number_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/lyce-de-roblox-2-hack-director_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/how-to-get-free-robux-on-roblox-on-ipad-2021_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/hack-roblox-bee-swarm-simulator-2021_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/free-spins-coin-master-app_GM406889139.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
stream_002_off00003155.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3155 23340 bytes
SHA-256: 5149324a40c82922bdb42749952bf0e26fe0c8cc5877170d95e35367b2f3dc33
font_01_sfnt_off000065d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65D2 18892 bytes
SHA-256: 0e76e7b24138cfa4d614eb6f056d3897d5c0eaba8dbb3d21cdf35042e4a6a81e

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