Malicious PDF — malware analysis report

Static analysis result for SHA-256 646304c8f5ae28c4…

MALICIOUS

PDF

34.3 KB Created: 2021-07-03 21:00:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 9980ed26b73b256250f3325e8d465aa5 SHA-1: 08ccad8359045839aec2a32d9854e8eb1dc57dbe SHA-256: 646304c8f5ae28c4feda6f50cf5c53254dee64168bb67c8e32f8c09ac4982815
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains links designed to lure users into clicking on what appears to be a game hack generator. The primary link, http://netcdn.tw/app/431946152/claimrobux-net-game-hack, is identified as malicious redirector infrastructure. The document body and embedded links suggest a phishing attempt related to free game currency or hacks, likely leading to further malicious content or malware download.

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/431946152/claimrobux-net-game-hack In PDF document text
    • http://elearning.mtsn3po.sch.id/__statics/gudangsoal/files/minecraft-tower-defense-hacked_GM479516143.pdfIn PDF document text
    • http://elearning.mtsn3po.sch.id/__statics/gudangsoal/files/how-to-get-free-spins-grom-coin-master_GM406889139.pdfIn PDF document text
    • http://elearning.mtsn3po.sch.id/__statics/gudangsoal/files/claim-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://elearning.mtsn3po.sch.id/__statics/gudangsoal/files/minecraft-free-computer-game_GM479516143.pdfIn PDF document text
    • http://elearning.mtsn3po.sch.id/__statics/gudangsoal/files/jai-eu-2021000-free-robux-no-fake-2021_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn3po.sch.id/__statics/gudangsoal/files/roblox-free-robux-com_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn3po.sch.id/__statics/gudangsoal/files/free-roblox-accounts-with-robux-that-work-2021_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn3po.sch.id/__statics/gudangsoal/files/village-4-coin-master_GM406889139.pdfIn PDF document text
    • http://elearning.mtsn3po.sch.id/__statics/gudangsoal/files/roblox-bee-swarm-simulator-hack-games_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn3po.sch.id/__statics/gudangsoal/files/roblox-promo-codes-free-robux_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn3po.sch.id/__statics/gudangsoal/files/get-free-robux-com_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn3po.sch.id/__statics/gudangsoal/files/is-tiktok-free-to-download_GM835599320.pdfIn PDF document text
    • http://elearning.mtsn3po.sch.id/__statics/gudangsoal/files/minecraft-redeem-code-free_GM479516143.pdfIn PDF document text
    • http://elearning.mtsn3po.sch.id/__statics/gudangsoal/files/schoto-roblox-free-shop-hose_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn3po.sch.id/__statics/gudangsoal/files/minecraft-apk-free-download-016-0_GM479516143.pdfIn PDF document text
    • http://elearning.mtsn3po.sch.id/__statics/gudangsoal/files/minecraft-hacks-18-9_GM479516143.pdfIn PDF document text
    • http://elearning.mtsn3po.sch.id/__statics/gudangsoal/files/hotel-empire-hack-roblox_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn3po.sch.id/__statics/gudangsoal/files/robux-hack-free-robux_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn3po.sch.id/__statics/gudangsoal/files/op-rewards-free-robux_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn3po.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-easy_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_off00002f81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F81 22240 bytes
SHA-256: bcdf798cf8b644ec0751a245ecba2cdcecc3af028775bed843138ea88137e7de
font_01_sfnt_off000060e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60E4 19108 bytes
SHA-256: 8549144b6f18b2ccf0b55f2fedb85a0be6a8b8214e4cc832aceb3ddc8068c3b2

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