Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c2708b053379d8d…

MALICIOUS

PDF

49.1 KB Created: 2021-06-11 11:48:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: d6e2ca22417f87974dda79c1ce263cad SHA-1: 82aed877d5be2768982162ac87b08ff851ee05d1 SHA-256: 0c2708b053379d8d97e2ba769f0f920902b2742943eaabdd0e4a88cf39ad438d
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to redirector domains, specifically advertising 'free generators' and 'game hacks' for popular games like Roblox. One prominent URL, 'https://netcdn.tw/app/431946152/free-pet-roblox-pet-simulator-game-hack', is flagged as a malicious redirector. The document body, though heavily obfuscated, contains similar URLs and text suggesting a lure for users to download further content, likely malware. No scripts were extracted, but the overall structure and embedded links point to a social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

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.tw/app/431946152/free-pet-roblox-pet-simulator-game-hack In PDF document text
    • http://library.forda-mof.org/katalog/repository/roblox-field-of-battle-gem-hack_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/coin-master-free-spins-1-coin-master_GM406889139.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/minecraft-diamond-finder-hack_GM479516143.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/clean-master-hack-coins_GM406889139.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/how-to-hack-someones-minecraft-account_GM479516143.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/guide--coin-master-free-tips_GM406889139.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/get-more-robux_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/free-download-coin-master_GM406889139.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/roblox-games-free_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/mangocheats-com-hack-coin-master-cheat_GM406889139.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/adopte-me-hack-project-alpha-300-roblox_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/roblox-hack-downland_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/coin-master-ad_GM406889139.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/free-spins-coinmaster_GM406889139.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/free-coin-master-link-2021_GM406889139.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/7-year-old-roblox_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/coin-master-hack-spins_GM406889139.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/master-coin-hack-app_GM406889139.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/zombie-rush-hack-roblox_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/free-spins-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00004f65.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4F65 27120 bytes
SHA-256: 8fc5aa819418b6d618b82cc87d4215e22d5a13b9bf9411bc8fa004a305a220ad
font_01_sfnt_off00008e35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E35 5696 bytes
SHA-256: 450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139
font_02_sfnt_off00009b47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9B47 18952 bytes
SHA-256: ee582dc0b1ca1d5bf1b4fe11f3ba0b451acd232711168fbc08c750f1974fb467

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