Malicious PDF — malware analysis report

Static analysis result for SHA-256 29d8af9a9727dfde…

MALICIOUS

PDF

46.1 KB Created: 2021-06-08 19:21:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 01b1b59df3c96196167f863281642011 SHA-1: ca5e309ba593ee15323ca39a84f43dcc3568b7f9 SHA-256: 29d8af9a9727dfde17a0aa955980b810824fa2006edbc40e7dd4a931f99c6d6f
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains multiple links that redirect to malicious infrastructure, masquerading as game hacks or generators. The primary lure, 'how-to-hack-any-roblox-account', is designed to entice users into clicking through to potentially harmful content. While no scripts were directly extracted, the PDF structure and embedded links strongly suggest a social engineering attack aimed at driving traffic to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

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/how-to-hack-any-roblox-account-using-windows-command-prompt-game-hack In PDF document text
    • http://lib.untad.ac.id//repository/how-do-you-get-robux_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/tiktok-free-gas-hack_GM835599320.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/minecraft-free_GM479516143.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/free-robux-without-downloading-apps_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/minecraft-free-play-now_GM479516143.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/gamehunters-club-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/roblox-free-items-2021_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/best-free-roblox-exploit-auto-update_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/www-roblox-robux_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/lazyblocks-com-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/coin-master-2021_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/free-robux-no-human-verify_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/como-tener-dinero-infinito-roblox-high-school-hack_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/minecraft-client_GM479516143.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/roblox-jailbreak-hack_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/free-coins-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/free-robux-generator-com-roblox-hack_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/free-robux-quiz_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/coin-master-free-spins-and-chips_GM406889139.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_004_off000053f3.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x53F3 24236 bytes
SHA-256: 45f116e25258779c96246ef5e095d8bec5e5e070912971e279943f0aace8f72e
font_01_sfnt_off00008ba2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8BA2 20328 bytes
SHA-256: 6d8add6ac535e6cc97a487277e958652784333ab913fb064764a30befd9aaa24

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