Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f61d16f5682180e…

MALICIOUS

PDF

44.6 KB Created: 2021-06-08 17:02:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04
MD5: d27b508f8c07556b9fcc2ac722aae00e SHA-1: b62ed594f61fbd049d69c804dbaef742186c1dea SHA-256: 9f61d16f5682180ee07eb53b9fcf2e259aa2f952513d181885177fe652fc1e49
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

Heuristics 4

  • 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 https://netcdn.tw/app/431946152/free-robux-generator-2021-vrai-game-hack PDF link annotation
    • http://library.feb.unila.ac.id/rfeb/repository/gain-robux_GM431946152.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/coin-master-hack-no-survey-or-verification_GM406889139.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/roblox-com-hack_GM431946152.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/hack-coin-master-for-free_GM406889139.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb//repository/mcpe-client_GM479516143.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/free-daily-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/google-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/roblox-pink-free-robux_GM431946152.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/pokmon-go-free-download-apk_GM1094591345.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/youtube-roblox-robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb//repository/vip-roblox-free_GM431946152.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/try-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb//repository/free-roblox-intros_GM431946152.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb//repository/free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb//repository/pokemon-go-free-hack-download_GM1094591345.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb//repository/rewardrobux-com_GM431946152.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb//repository/roblox-robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/can-you-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/pubg-uc-vn_GM1330123889.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/coin-master-tiradas-gratis-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
stream_004_off00004f8c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4F8C 25740 bytes
SHA-256: 71641590e42981cc6b25c41a82f236560b68755f0c1b646e7b30c1ec86ebf4a1
font_01_sfnt_off00008967.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8967 19004 bytes
SHA-256: 14c421a593b4f82c7f26150c64556bb4f6c74b636406b3bc24ee8b96088587c4

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