Malicious PDF — malware analysis report

Static analysis result for SHA-256 d520624ac0e75d2e…

MALICIOUS

PDF

41.7 KB Created: 2021-05-16 23:06:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 2031410ba0b6bfdb85b666979787bd36 SHA-1: 9744940ce44bde5bf7d532726841ad14d2093806 SHA-256: d520624ac0e75d2e608f65ce27914ca073cf4188b732b867c6f41e070d4a79de
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 0.9971

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.xyz/app/406889139/coin-master-hack-no-verification-2021-game-hack PDF link annotation
    • http://dshikr.ru/images/coin-master-free-spins-link-blogspot_GM406889139.pdfIn PDF document text
    • http://dshikr.ru/images/roblox-hack-ga_GM431946152.pdfIn PDF document text
    • http://dshikr.ru/images/free-roblox-codes_GM431946152.pdfIn PDF document text
    • http://dshikr.ru/images/roblox-games-free_GM431946152.pdfIn PDF document text
    • http://dshikr.ru/images/easy-robux-generator_GM431946152.pdfIn PDF document text
    • http://dshikr.ru/images/coin-master-bonus_GM406889139.pdfIn PDF document text
    • http://dshikr.ru/images/codes-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://dshikr.ru/images/free-minecraft-alts_GM479516143.pdfIn PDF document text
    • http://dshikr.ru/images/coin-master-attack-hack_GM406889139.pdfIn PDF document text
    • http://dshikr.ru/images/hack-card-collection-coin-master_GM406889139.pdfIn PDF document text
    • http://dshikr.ru/images/roblox-group-free-robux_GM431946152.pdfIn PDF document text
    • http://dshikr.ru/images/coin-master-hack-spins-free_GM406889139.pdfIn PDF document text
    • http://dshikr.ru/images/free-robux-that-actually-works-2021_GM431946152.pdfIn PDF document text
    • http://dshikr.ru/images/free-spins-coin-master-without-survey_GM406889139.pdfIn PDF document text
    • http://dshikr.ru/images/free-robux-apps-that-work_GM431946152.pdfIn PDF document text
    • http://dshikr.ru/images/roblox-generator-com_GM431946152.pdfIn PDF document text
    • http://dshikr.ru/images/best-free-minecraft-server-hosting-reddit_GM479516143.pdfIn PDF document text
    • http://dshikr.ru/images/free-minecraft-mods-for-ps4_GM479516143.pdfIn PDF document text
    • http://dshikr.ru/images/can-you-get-robux-for-free_GM431946152.pdfIn PDF document text
    • http://dshikr.ru/images/free-spins-on-coin-master_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_003_off0000481a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x481A 24596 bytes
SHA-256: d5ea78a18cf7ea75e2fd4f09c0664fe2f866f072b44105e9127e4987689ab1df
font_01_sfnt_off000080a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x80A4 18252 bytes
SHA-256: 180d563c5e2d4e96f25bdfb7de4de3bd7d6a0696216fbddae55f211609535b0c