Malicious PDF — malware analysis report

Static analysis result for SHA-256 de01b264678fc614…

MALICIOUS

PDF

34.1 KB Created: 2021-07-08 05:17:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 48477d96345573aadc465719f21ef449 SHA-1: 89b45c5de3c7f09c5a99c2111e0d9edd61a4a877 SHA-256: de01b264678fc614aba2b6262ebe83971c3df0b962ef663d9c04a95274853a5d
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links, including one identified as a malicious redirector, designed to lure users into downloading game hacks or cheats. The primary malicious URL is http://netcdn.tw/app/406889139/coin-master-download-hack-ios-game-hack. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest a social engineering attack aiming to deliver a secondary payload or lead users to a phishing site.

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/coin-master-download-hack-ios-game-hack In PDF document text
    • http://digilib.iailm.ac.id/repository/free-doge-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/roblox-getting-hacked-full-video-of-it-happening_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/coin-master-hack-pro-gamers-com_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/how-do-you-get-free-pet-food-in-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/freespinandcoin-blogspot-com_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/ac-market-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/get-robux_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/2021-robux-free-daily_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/how-to-get-spins-for-free-on-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/free-minecraft-alt-accounts_GM479516143.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/easy-robux-today-com_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/coin-master-viking-quest-hack_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/minecraft-svg-images-free_GM479516143.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/free-robux-2021_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/seniac-roblox-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/links-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/roblox-hack-script-pastebin_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/check-cashed-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/get-free-spins-coin-master-link_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/roblox-flame-cheat_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
stream_002_off00002efa.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2EFA 22640 bytes
SHA-256: dbb3917be0e1ca400d809eb3fc30e67d9a10e108c1b27a182d93e846d464fd0a
font_01_sfnt_off000061ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61BA 18584 bytes
SHA-256: 0cc53e6ff5965a6bde6e826f187bf2e09f3f61dfd66a91e989fd5a35dba691c6

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