Malicious PDF — malware analysis report

Static analysis result for SHA-256 702be733aa6bf285…

MALICIOUS

PDF

34.5 KB Created: 2021-07-05 10:21:16 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 0225c305312d144a071637dc8822fdd7 SHA-1: 7cc31309cc9941cc520417684b309d3c2c6715b9 SHA-256: 702be733aa6bf285c8ba4942f7b75fa621a04fc88cd7f322190d3e534e280764
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous external links, many of which are disguised as game hacks or free currency generators for popular games like Roblox and Coin Master. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of these links, suggesting a tactic to manipulate search engine results or redirect users to potentially malicious sites. The primary lure appears to be 'robuxmatch-com-free-robux-game-hack', which points to a suspicious domain.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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.
  • 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
  • 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/431946152/robuxmatch-com-free-robux-game-hack PDF link annotation
    • http://library.stieyapan.ac.id/repository/free-robux-real-2021_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/free-spin-coin-master-hacktoman_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/how-to-get-minecraft-for-free-on-pc_GM479516143.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/minecraft-windows-10-hacks_GM479516143.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/free-games-like-coin-master_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/how-can-you-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/free-2021-robux_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/pubg-uc-carding-in-pakistan_GM1330123889.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/how-to-hack-roblox-accounts-2021-easy_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/robux-free-robux_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/free-roblox-girl-hair-not-a-model_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/best-games-to-hack-roblox_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/lazyblox-com-free-robux_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/prison-life-roblox-hacks_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/hacks-for-roblox-prison-life_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/coin-master-daily-gift-free-spins-and-coins-link-today_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/free-card-collection-in-coin-master_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/no-human-verification_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/coin-master-hack-spins-apk-download_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/coin-master-hack-no-survey-2021_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_off00003002.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3002 22144 bytes
SHA-256: 51036a6e5c2a79e7c0a4965f35f979e72cf7e7ee7c82d7112ab7692c07bc3c5c
font_01_sfnt_off00006136.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6136 19244 bytes
SHA-256: 4ad327823a1ecd3abfe961c49d13734587955ac9e5f3e77b093970b56673cf6a

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