Malicious PDF — malware analysis report

Static analysis result for SHA-256 13ba12ed3dce8feb…

MALICIOUS

PDF

33.1 KB Created: 2021-07-06 12:03:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 232723ac3df454749d0e895c01498906 SHA-1: a53b78bd3ebb4c7de676bf8e8033ccdf4b915d6b SHA-256: 13ba12ed3dce8feb420f3f66252993428afb16b238862526f5e6beb5d1d2a276
76 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, with a primary focus on luring users with promises of free game hacks and followers for platforms like TikTok and Roblox. The ML classifier strongly indicates maliciousness, and the embedded URLs point to potentially harmful content. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest it's designed to redirect users to malicious sites, likely for further exploitation or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED
    The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
  • 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/835599320/tiktok-follower-bot-free-game-hack PDF link annotation
    • http://lib.uho.ac.id/library//repository/gain-robux_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/daily-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/coin-master_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/coin-master-free-coins-amp_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/roblox-help-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/free-coins-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/how-to-download-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/free-hacks-for-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/coin-master-free-spins-instagram_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/minecraft-dungeons-free-download-pc_GM479516143.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/coin-master-fan-page_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/minecraft-free-play-now_GM479516143.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/coin-master-hack-apk-35-33_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/roblox-bloxburg-free-money_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/coin-master-free-coin-and-spin-app_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/free-attacks-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/gamehunters-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/hack-coin-master-ios-download_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/free-spins-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/how-to-get-free-robux_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_off00003019.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3019 21608 bytes
SHA-256: 7f7666ed86bdeadc41c0a6402e7366daec2766905908278cbcf7e92545595b56
font_01_sfnt_off00005f57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F57 18428 bytes
SHA-256: affadc9525e73c214b04e52c3329ac878b5dc0447f7849dc6b07f5a35e49d9d0

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