Malicious PDF — malware analysis report

Static analysis result for SHA-256 857cdc289ac525d8…

MALICIOUS

PDF

34.1 KB Created: 2021-06-18 23:11:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 61c99ef7d17c07736321b17c5503b4e3 SHA-1: 225a863bad9c479ba58d90933243352dee201f2f SHA-256: 857cdc289ac525d89a6f2928fbd882cc20b84915169bc8b4fc0b04a359688ba4
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.co/app/431946152/ez-how-to-get-free-robux-game-hack PDF link annotation
    • https://www.sitiwebjoomla.it/images/free-spins-coin-master-october-17-2021_GM406889139.pdfIn PDF document text
    • https://www.sitiwebjoomla.it/images/free-robux-game-for-real_GM431946152.pdfIn PDF document text
    • https://www.sitiwebjoomla.it/images/free-robux-real_GM431946152.pdfIn PDF document text
    • https://www.sitiwebjoomla.it/images/1x1x1x1-roblox-id_GM431946152.pdfIn PDF document text
    • https://www.sitiwebjoomla.it/images/roblox-com-hack_GM431946152.pdfIn PDF document text
    • https://www.sitiwebjoomla.it/images/can-u-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.sitiwebjoomla.it/images/coin-master-hack-apk-35-13_GM406889139.pdfIn PDF document text
    • https://www.sitiwebjoomla.it/images/coin-master-free-cards-link-2021_GM406889139.pdfIn PDF document text
    • https://www.sitiwebjoomla.it/images/free-robux-without-offers_GM431946152.pdfIn PDF document text
    • https://www.sitiwebjoomla.it/images/redeem-roblox-cards-free-codes-2021_GM431946152.pdfIn PDF document text
    • https://www.sitiwebjoomla.it/images/free-coin-master-hacks-no-verification_GM406889139.pdfIn PDF document text
    • https://www.sitiwebjoomla.it/images/coin-master-cards-free-cards_GM406889139.pdfIn PDF document text
    • https://www.sitiwebjoomla.it/images/coin-master-free-link_GM406889139.pdfIn PDF document text
    • https://www.sitiwebjoomla.it/images/top-cheat-limited-u-on-roblox_GM431946152.pdfIn PDF document text
    • https://www.sitiwebjoomla.it/images/free-robux-that-actually-works_GM431946152.pdfIn PDF document text
    • https://www.sitiwebjoomla.it/images/free-roblox-merch_GM431946152.pdfIn PDF document text
    • https://www.sitiwebjoomla.it/images/dbz-rage-roblox-hacks_GM431946152.pdfIn PDF document text
    • https://www.sitiwebjoomla.it/images/minecraft-reach-hack_GM479516143.pdfIn PDF document text
    • https://www.sitiwebjoomla.it/images/coinmaster-free-spins-link_GM406889139.pdfIn PDF document text
    • https://www.sitiwebjoomla.it/images/hack-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 5

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003004.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3004 21980 bytes
SHA-256: a27dfafd1e7856378862d6a8725e5fade109bf562f2a7d5bc8ebfe489856a24f
font_01_sfnt_off0000608d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x608D 18880 bytes
SHA-256: a740ca0924210ff6a9690e137a309744cd2aefc138e1ff858ff8bc1e3757a507

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