Malicious PDF — malware analysis report

Static analysis result for SHA-256 91abc17c5707a010…

MALICIOUS

PDF

34.1 KB Created: 2021-07-03 13:55:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: c709a2062aa3cab431825a950bfb6956 SHA-1: be4d7a12f7b600aa33e124d5532a58c888421bbc SHA-256: 91abc17c5707a010eb668e69e176cc01edead59d0939b88eb227b39c7f5e02a8
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links designed to lure users into clicking on them by promising free game currency or hacks. The primary link, http://netcdn.tw/app/431946152/robloxheroxyz-free-robux-game-hack, is identified as a malicious redirector. The document body and heuristics indicate a social engineering tactic to drive traffic to potentially malicious websites.

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/robloxheroxyz-free-robux-game-hack In PDF document text
    • http://lib.kesdammedan.ac.id/repository/best-level-7-exploits-free-roblox_GM431946152.pdfIn PDF document text
    • http://lib.kesdammedan.ac.id//repository/free-robux-without-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://lib.kesdammedan.ac.id/repository/roblox-undetectable-cheat-engine_GM431946152.pdfIn PDF document text
    • http://lib.kesdammedan.ac.id/repository/minecraft-pvp-hacks_GM479516143.pdfIn PDF document text
    • http://lib.kesdammedan.ac.id/repository/diamond-hacker-roblox_GM431946152.pdfIn PDF document text
    • http://lib.kesdammedan.ac.id/repository/moonactive-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.kesdammedan.ac.id//repository/classic-minecraft-net-hacks_GM479516143.pdfIn PDF document text
    • http://lib.kesdammedan.ac.id/repository/how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.kesdammedan.ac.id//repository/cool-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://lib.kesdammedan.ac.id/repository/roblox-id-code-for-cheats-for-hoes_GM431946152.pdfIn PDF document text
    • http://lib.kesdammedan.ac.id/repository/earn-robux-free-online_GM431946152.pdfIn PDF document text
    • http://lib.kesdammedan.ac.id/repository/roblox-manete-free-box_GM431946152.pdfIn PDF document text
    • http://lib.kesdammedan.ac.id/repository/how-to-hack-miners-haven-roblox_GM431946152.pdfIn PDF document text
    • http://lib.kesdammedan.ac.id/repository/hack-pour-roblox_GM431946152.pdfIn PDF document text
    • http://lib.kesdammedan.ac.id/repository/orewards-com-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.kesdammedan.ac.id/repository/how-to-get-free-pet-snacks-in-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.kesdammedan.ac.id//repository/coin-master-attack-hack-apk_GM406889139.pdfIn PDF document text
    • http://lib.kesdammedan.ac.id/repository/minecraft-net-free_GM479516143.pdfIn PDF document text
    • http://lib.kesdammedan.ac.id/repository/coin-master-hack-app-android-download_GM406889139.pdfIn PDF document text
    • http://lib.kesdammedan.ac.id//repository/is-java-minecraft-free_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
font_00_sfnt_off00002d8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D8A 22500 bytes
SHA-256: 255f1dc94f85c672800402d05790616245ea33e6fa8e67e8ef5955f9833ba991
font_01_sfnt_off00005fb4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FB4 19220 bytes
SHA-256: 9a75403dc61fcebb8363624a6f582dcc4ac1fd2d4c1d167fae2ecfa95e24b96b

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