Malicious PDF — malware analysis report

Static analysis result for SHA-256 b575017cf14f80b2…

MALICIOUS

PDF

33.2 KB Created: 2021-07-24 06:10:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: ba7b333cc462b5a062fc3d1805bce095 SHA-1: 534c90f2089762f59fcdf86e68e077e8abb990f2 SHA-256: b575017cf14f80b29c0f2bfe72f7337a82e91062f8ea7706c8cb9ad7f242384c
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 0.9942

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-robux-websites-that-actually-work-2021-game-hack PDF link annotation
    • http://mmech.com/images/buy-tiktok-followers-free_GM835599320.pdfIn PDF document text
    • http://mmech.com/images/how-to-get-minecraft-for-free-on-iphone_GM479516143.pdfIn PDF document text
    • http://mmech.com/images/how-to-get-minecraft-for-free-on-ps4_GM479516143.pdfIn PDF document text
    • http://mmech.com/images/how-to-hack-roblox-accounts-for-robux_GM431946152.pdfIn PDF document text
    • http://mmech.com/images/free-minecraft-worlds_GM479516143.pdfIn PDF document text
    • http://mmech.com/images/free-tiktok-followers-no-downloads_GM835599320.pdfIn PDF document text
    • http://mmech.com/images/free-robux-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://mmech.com/images/can-you-make-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • http://mmech.com/images/free-robux-no-human-verification-or-survey-or-download_GM431946152.pdfIn PDF document text
    • http://mmech.com/images/free-coins-and-spins-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
font_00_sfnt_off00002954.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2954 22316 bytes
SHA-256: 5eeaa637a0020fb29b808ebd8278521969cefd3e4e389822b647a88a629d726d
font_01_sfnt_off00005b18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B18 19840 bytes
SHA-256: 415b7ee37fda4fc7e840ae839cc984cb2b4a0b95548347be2336140620e9a02b

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