Malicious PDF — malware analysis report

Static analysis result for SHA-256 476e60164f1cae2f…

MALICIOUS

PDF

34.3 KB Created: 2021-07-06 01:27:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 743d350ce540420b7435655bf0d95c0b SHA-1: 6ad8c0310a1096f6e980e31bd846ba8a77aa89a9 SHA-256: 476e60164f1cae2f4de5b11566340d5179c309d9cae9c2a23b445b87ae870964
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links designed to lure users into clicking on what appear to be game hacks or generators. One primary link, http://netcdn.tw/app/406889139/play-coin-master-for-free-game-hack, leads to a known malicious redirector. The document body and heuristics indicate a mass link farm strategy, likely intended to drive traffic to malicious sites or facilitate phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/406889139/play-coin-master-for-free-game-hack In PDF document text
    • http://opac.library.uib.ac.id/repository/coin-master-hack-spins-and-coins-unlimited-free-download_GM406889139.pdfIn PDF document text
    • http://opac.library.uib.ac.id/repository/minecraft-pvp-hacks_GM479516143.pdfIn PDF document text
    • http://opac.library.uib.ac.id/repository/free-robux-no-human-verification-generator_GM431946152.pdfIn PDF document text
    • http://opac.library.uib.ac.id//repository/free-robux-obby-2021_GM431946152.pdfIn PDF document text
    • http://opac.library.uib.ac.id/repository/free-coin-master-gold-cards_GM406889139.pdfIn PDF document text
    • http://opac.library.uib.ac.id/repository/avatar-the-last-airbender-roblox_GM431946152.pdfIn PDF document text
    • http://opac.library.uib.ac.id/repository/hack-version-of-coin-master_GM406889139.pdfIn PDF document text
    • http://opac.library.uib.ac.id/repository/how-to-hack-roblox-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://opac.library.uib.ac.id/repository/coin-master-free-spin-ml_GM406889139.pdfIn PDF document text
    • http://opac.library.uib.ac.id//repository/free-robux-games-that-actually-work-2021_GM431946152.pdfIn PDF document text
    • http://opac.library.uib.ac.id/repository/how-to-upload-music-to-roblox-for-free-2021_GM431946152.pdfIn PDF document text
    • http://opac.library.uib.ac.id/repository/wahoogaming-co-free-robux_GM431946152.pdfIn PDF document text
    • http://opac.library.uib.ac.id/repository/hacking-laurenzside-roblox_GM431946152.pdfIn PDF document text
    • http://opac.library.uib.ac.id/repository/roblox-bux-free_GM431946152.pdfIn PDF document text
    • http://opac.library.uib.ac.id//repository/how-to-become-a-hacker-in-roblox_GM431946152.pdfIn PDF document text
    • http://opac.library.uib.ac.id//repository/coin-master-spin-free_GM406889139.pdfIn PDF document text
    • http://opac.library.uib.ac.id/repository/coin-master-coins-free_GM406889139.pdfIn PDF document text
    • http://opac.library.uib.ac.id//repository/master-8-ball-pool-free-coins_GM406889139.pdfIn PDF document text
    • http://opac.library.uib.ac.id/repository/free-robux-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://opac.library.uib.ac.id//repository/coin-master-hack-2021-iphone_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
font_00_sfnt_off00003034.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3034 22688 bytes
SHA-256: 5c20a7ef42217b22088314912865707cf5ad7a35dd0e9b5a6db8c7dae0b80702
font_01_sfnt_off00006306.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6306 18408 bytes
SHA-256: f8c4a809e2c79df09a2079c4cce2304cedc8797beaad6eb7a887c6bd5ba0394d

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