Malicious PDF — malware analysis report

Static analysis result for SHA-256 da90acb725c03d51…

MALICIOUS

PDF

34.1 KB Created: 2021-07-04 23:14:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 27ed26c968aec76ccc093b7d76c28cbb SHA-1: 604210e0c3ab30c361f5ef08adbc9d6539fbd22c SHA-256: da90acb725c03d512c4f7314b79f7535fd54143cfca4653984cb816ef2fedfc6
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 0.9980

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 http://netcdn.tw/app/431946152/free-roblox-clothes-and-hair-game-hack PDF link annotation
    • http://library.itekes-bali.ac.id/repository/free-mod-apk-coin-master_GM406889139.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/free-robux-reddit_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/how-to-get-free-robux-google_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/roblox-robux-generator-no-hack_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/roblox-free-vip-server_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/free-robux-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/coin-master-villages_GM406889139.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/minecraft-pe-hack-client_GM479516143.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/free-robux-awards_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/hack-in-roblox-players-acc-com_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/roblox-hack-god-mode-phantom-forces_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/1-https-wwwrobloxcom-games-202120211-mortusrpgfreevip_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/free-roblox-items-codes_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/best-free-hacked-client_GM479516143.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/how-to-get-free-gold-cards-on-coin-master_GM406889139.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/redeem-code-roblox-2021-free_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/promo-code-free-robux_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/roblox-noclip-hack-cheat-engine_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/free-robux-no-download_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/coin-master-heaven-free-spins-link_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_off00002ea1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2EA1 22140 bytes
SHA-256: 6136f2cd926067878a3571706f4b9afdd99908a2c1e42058b2f06d08370de614
font_01_sfnt_off00005fc3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FC3 19216 bytes
SHA-256: 7e2ba9ac97b995c4042039eded303f1a68f0b8ee29cce668a26419cd3902f156

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