Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f3f77121a37f497…

MALICIOUS

PDF

45.7 KB Created: 2021-05-15 05:08:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 41ae0969f4ecde44e5521d4d0823ee58 SHA-1: 9310590e97bed919c930cace30adc093f9efb58c SHA-256: 1f3f77121a37f497b56044ff1fbccf8467c825a664d41322b235c3125d6c7d8d
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 0.9507

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/431946152/free-robux-videos-game-hack PDF link annotation
    • http://techmobil.pl/images/free-robux-generator_GM431946152.pdfIn PDF document text
    • http://techmobil.pl/images/minecraft-diamond-finder-hack_GM479516143.pdfIn PDF document text
    • http://techmobil.pl/images/free-roblox-website_GM431946152.pdfIn PDF document text
    • http://techmobil.pl/images/coin-master-daily-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://techmobil.pl/images/oprewards-points-generator_GM431946152.pdfIn PDF document text
    • http://techmobil.pl/images/free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://techmobil.pl/images/free-robux-gift-card-codes_GM431946152.pdfIn PDF document text
    • http://techmobil.pl/images/cmaster-club-coin-master-hack-tool_GM406889139.pdfIn PDF document text
    • http://techmobil.pl/images/minecraft-free-games-no-download_GM479516143.pdfIn PDF document text
    • http://techmobil.pl/images/coin-master-free_GM406889139.pdfIn PDF document text
    • http://techmobil.pl/images/free-roblox-groups-with-funds_GM431946152.pdfIn PDF document text
    • http://techmobil.pl/images/coin-master-play-online-free_GM406889139.pdfIn PDF document text
    • http://techmobil.pl/images/free-minecraft-printables-food-labels_GM479516143.pdfIn PDF document text
    • http://techmobil.pl/images/robux-free-gift-card-org-hack_GM431946152.pdfIn PDF document text
    • http://techmobil.pl/images/free-robux-sites-that-work_GM431946152.pdfIn PDF document text
    • http://techmobil.pl/images/roblox-comroblox_GM431946152.pdfIn PDF document text
    • http://techmobil.pl/images/how-to-get-free-robux-fast-and-easy_GM431946152.pdfIn PDF document text
    • http://techmobil.pl/images/rbx-free-robux_GM431946152.pdfIn PDF document text
    • http://techmobil.pl/images/how-to-hack-coin-master-ios-2021_GM406889139.pdfIn PDF document text
    • http://techmobil.pl/images/how-to-get-more-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004bf2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4BF2 25064 bytes
SHA-256: 601ed41495188079b97a05c8a60c8465496aba59e0538f745adee399c35f9377
font_01_sfnt_off00008577.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8577 2816 bytes
SHA-256: 4555740682277f0055d57b15bd0ba953e5b51415ea3d21c93db391eace072d4f
font_02_sfnt_off00008f88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F88 18444 bytes
SHA-256: 1ec21ed17295e3d49cd7a507c4ef3ee968e538ae560c82d8bcc555326bed268a

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