Malicious PDF — malware analysis report

Static analysis result for SHA-256 f83f735f77cda43e…

MALICIOUS

PDF

34.2 KB Created: 2021-07-05 21:25:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: ad2cf6503d0ea3f330dd6d451d4f7e7e SHA-1: 2dae899eeae30705b6ffd3f79b53982ed0a80aa2 SHA-256: f83f735f77cda43ec4e0bcfb8406bc6ea6caad63bcdd1255cbbd7b515877c146
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links and text that promote a 'free generator / game hack' for Robux, a common lure for phishing and malware distribution. The primary link directs to a known malicious redirector, indicating a high likelihood of leading users to a malicious site or download. No scripts were extracted, but the document's structure and content strongly suggest a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/431946152/robux-fun-hack-game-hack In PDF document text
    • http://digilib.unla.ac.id/repository/spin-coin-master-free_GM406889139.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/how-do-you-get-free-cars-in-roblox-vehicle-simulater_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/how-do-u-get-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/moonactive-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/roblox-robux-hack-generator_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/how-to-get-free-robux-without-paying_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/how-to-hack-people-on-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/how-do-you-earn-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/roblox-free-hair-codes_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/free-minecraft-codes-2021_GM479516143.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/roblox-dbz-rage-cheats_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/roblox-pokemon-go-free-online_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/roblox-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/how-to-hack-roblox-and-get-free-stuff_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/terminal-railway-roblox-hack_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/free-robux-no-download_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/roblox-surf-hack-script-2021_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/coin-master-hack-review_GM406889139.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/free-robux-on-ipad_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_off00002d84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D84 22960 bytes
SHA-256: 4229d156052fc3302beb229fb96c0ddfcd80dc02926e85ca40a0384fe2b9307b
font_01_sfnt_off00006142.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6142 18884 bytes
SHA-256: c1015eee087a13dc62c4aba5d792f044bb527228a7c6867863e8b6cb34361f4d

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