Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e687e6b2272a3a1…

MALICIOUS

PDF

30.6 KB Created: 2021-07-05 00:37:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: bf8fec0a713e943cf00ee445d905aadd SHA-1: d031bca0d022f0eec47f2184c31f0398b62fe033 SHA-256: 7e687e6b2272a3a15eb75d2f68941fd5d1761beac4e575596caf7ee3d57c6d5f
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document contains numerous links disguised as game hacks and free currency generators, a common lure for phishing or malware distribution. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, suggesting a link farm designed to attract traffic. The primary malicious URL identified is http://netcdn.tw/app/406889139/coin-master-tiradas-gratis-2021-game-hack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

Heuristics 4

  • 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.
  • 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
  • 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/coin-master-tiradas-gratis-2021-game-hack PDF link annotation
    • http://library.feb.unila.ac.id/rfeb/repository/how-to-get-anything-for-free-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/how-to-hack-coin-master-ios-no-jailbreak_GM406889139.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/roblox-hack-no-verification-or-survey-or-download_GM431946152.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/coin-master-hack-pc-free_GM406889139.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/cache-http-wwwrobuxiancom-freerobuxcodegenerator_GM431946152.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/free-spins-coin-master-no-survey_GM406889139.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/how-to-glitch-free-robux_GM431946152.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb//repository/easy-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/moonactive-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/hack-para-dragon-ball-rage-roblox-2021-android_GM431946152.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/claim-roblox_GM431946152.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/cheat-codes-for-ben-10-universal-showdown-roblox_GM431946152.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/free-coins-coin-master_GM406889139.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/minecraft-free-ios-2021_GM479516143.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/robux-hack-tool-android_GM431946152.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/free-spin-coin-master-game_GM406889139.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/coin-master-fan-hack_GM406889139.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/coin-master-spin-free_GM406889139.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/free-robux-images_GM431946152.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/coin-master-unlimited-free-spins_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000327b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x327B 22836 bytes
SHA-256: b3813a94aa198ae9194d7f86b6c57b01d03338f8ba85270f130f8dca446afeef

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