Malicious PDF — malware analysis report

Static analysis result for SHA-256 3584749a7f3d1394…

MALICIOUS

PDF

42.3 KB Created: 2021-05-15 03:32:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 35225567b910fe98ffa91a7ae2356a03 SHA-1: 8745bd1f6e5800b6d45040fd24040087e9cd9406 SHA-256: 3584749a7f3d1394c34bbfa470581a69293493c485194e5257b6e5c6b5f98dda
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a prominent link to a redirector URL, identified as malicious. The document body and embedded links suggest a lure for game hacks or cheats, a common social engineering tactic. The presence of multiple embedded URLs and the critical heuristic firings strongly indicate a malicious intent to redirect users to potentially harmful content.

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/406889139/free-coin-master-gifts-game-hack In PDF document text
    • https://elearning.mtsn9jombang.sch.id/__statics/gudangsoal/files/robux-fun-hack_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn9jombang.sch.id/__statics/gudangsoal/files/coin-master-hack-mod-apk_GM406889139.pdfIn PDF document text
    • http://elearning.mtsn9jombang.sch.id/__statics/gudangsoal/files/free-roblox-codes-2021_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn9jombang.sch.id/__statics/gudangsoal/files/coin-master-cards-hack-2021_GM406889139.pdfIn PDF document text
    • http://elearning.mtsn9jombang.sch.id/__statics/gudangsoal/files/coin-master-game-hack-online_GM406889139.pdfIn PDF document text
    • http://elearning.mtsn9jombang.sch.id/__statics/gudangsoal/files/free-minecraft-server-hosting-24-7_GM479516143.pdfIn PDF document text
    • https://elearning.mtsn9jombang.sch.id/__statics/gudangsoal/files/robux-no-human-verification_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn9jombang.sch.id/__statics/gudangsoal/files/free-cheat-codes-for-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn9jombang.sch.id/__statics/gudangsoal/files/get-minecraft-windows-10-free_GM479516143.pdfIn PDF document text
    • http://elearning.mtsn9jombang.sch.id/__statics/gudangsoal/files/hack-coin-master-apk_GM406889139.pdfIn PDF document text
    • http://elearning.mtsn9jombang.sch.id/__statics/gudangsoal/files/how-to-get-free-coins-and-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://elearning.mtsn9jombang.sch.id/__statics/gudangsoal/files/village-4-coin-master_GM406889139.pdfIn PDF document text
    • http://elearning.mtsn9jombang.sch.id/__statics/gudangsoal/files/archery-master-3d-apk-and-mod-free-download-unlimited-coins_GM406889139.pdfIn PDF document text
    • http://elearning.mtsn9jombang.sch.id/__statics/gudangsoal/files/roblox-18_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn9jombang.sch.id/__statics/gudangsoal/files/free-robux-mobile_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn9jombang.sch.id/__statics/gudangsoal/files/free-coin-master-spins-for-today_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn9jombang.sch.id/__statics/gudangsoal/files/haktuts-coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn9jombang.sch.id/__statics/gudangsoal/files/free-roblox-accounts-2021_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn9jombang.sch.id/__statics/gudangsoal/files/daily-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://elearning.mtsn9jombang.sch.id/__statics/gudangsoal/files/best-minecraft-hacks_GM479516143.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_off00004cc2.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4CC2 24780 bytes
SHA-256: 56a8fe9deea62114d4beb272946f8eabe29705ddd18474d7189dacbc060dd8e1
font_01_sfnt_off000084e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x84E2 17712 bytes
SHA-256: a02a8482596092bbe2b4efe270951b6f574c255f03fc3b97eeb87af209467e86

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