Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad8060c5470dafc7…

MALICIOUS

PDF

44.5 KB Created: 2021-06-03 06:21:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: d8eb50468f5df5cb8c26e080a81e21e1 SHA-1: 6cdf829a95d7b680bf0a720e87c85a6e94ff5884 SHA-256: ad8060c5470dafc7ea65bb45d4ad9517de35f3a5811ef98aef273b330f38e1fa
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that redirect to malicious infrastructure, specifically promoting a 'free generator / game hack'. The ML classifier also flagged this PDF as malicious. The presence of these links and the lure suggest an attempt to trick users into visiting potentially harmful sites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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.online/app/406889139/free-games-like-coin-master-game-hack In PDF document text
    • http://digilib.uim.ac.id/repository/coin-master-links-free-spins_GM406889139.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/free-coins-2021-coin-master-link_GM406889139.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/free-robux-2021_GM431946152.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/minecraft-launcher-download-free_GM479516143.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/links-to-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/coin-master-free-coins-amp_GM406889139.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/coin-master-pc-game-free-download_GM406889139.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/free-spins-coin-master-links_GM406889139.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/minecraft-windows-10-hack-client-2021_GM479516143.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/get-me-robux-for-free_GM431946152.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/minecraft-images-free_GM479516143.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/free-coins-coin-master_GM406889139.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/coin-master-hack-app-for-iphone_GM406889139.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/wurst-112_GM479516143.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/roblox-rape_GM431946152.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/minecraft-ps4-code-free_GM479516143.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/how-to-get-free-robux-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/free-roblox-groups-with-funds_GM431946152.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/free-coin-and-spin-in-coin-master_GM406889139.pdfIn PDF document text
    • https://coinmasterspinandcoin.comIn 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_off0000521c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x521C 25192 bytes
SHA-256: 923e3de9b4a3f512b00799b428e67f46c4c350285612f28fccf3f6b7b4c2421d
font_01_sfnt_off00008be7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8BE7 18140 bytes
SHA-256: 0fa8c8b4839815decb7824e6abfd23c338a1fcad8391028ddb14be23d50d94bc

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