Malicious PDF — malware analysis report

Static analysis result for SHA-256 35d8fbcf9ba0b3bd…

MALICIOUS

PDF

43.8 KB Created: 2021-06-13 22:12:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 8c3e5490480c3a3c4091bd9c11453858 SHA-1: 632e31ad4c3969f1ff74ad75eea859ef98b51521 SHA-256: 35d8fbcf9ba0b3bd3524a968aa04bf7a50e017fc3f935c565a107d0e7076ec7c
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 0.9969

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.co/app/431946152/free-marshmellow-head-on-roblox-game-hack PDF link annotation
    • http://digilib.stimlog.ac.id/repository/coin-master-free-spin-and-coins-links_GM406889139.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/how-to-get-free-hair-in-roblox_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/how-to-watch-ads-for-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-robux-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/coin-master-daily-free-spins-link-today-blog_GM406889139.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/robux-hacks-2021_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/free-robux-earn_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-robux-with-no-verification_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/village-3-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/coin-master-spin-hack-trick_GM406889139.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/how-to-get-free-robux-on-chromebook_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-spin-link_GM406889139.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-games-like-roblox_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-robux-without-verification-or-survey_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-coins-and-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/roblox-mobile-hack_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/roblox-prison-life-hacks-2021_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/hack-coin-master-spin_GM406889139.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/how-to-hack-roblox-assassin-2021_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/minecraft-tower-defense-hacked_GM479516143.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_off00004aca.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4ACA 25564 bytes
SHA-256: d10e20c518b44eaadea7aa9a32b0499d35e98307ec1ad8fd71bb6067549d2202
font_01_sfnt_off00008686.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8686 19136 bytes
SHA-256: a63910c1f4169125f6f09bf3a5eb8702126ef663a9656e8a62b7a96a112e3be8

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