Malicious PDF — malware analysis report

Static analysis result for SHA-256 2594d39774ddcf6b…

MALICIOUS

PDF

37.5 KB Created: 2021-05-21 02:44:53 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: a6b5823d7feaf237e710d82d1f6357cd SHA-1: 2381999ac547906df270e70760cf0825826f75ec SHA-256: 2594d39774ddcf6b2c188d5823d6fac63c5c87f1dc1818c86910c99cb2ab2c56
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 0.9447

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/how-to-get-100-robux-for-free-game-hack PDF link annotation
    • http://nalmpantistractors.gr/images/cm-daily-spins_GM406889139.pdfIn PDF document text
    • http://nalmpantistractors.gr/images/free-gold-cards-coin-master_GM406889139.pdfIn PDF document text
    • http://nalmpantistractors.gr/images/coin-master-free-spins-link-2021-twitter_GM406889139.pdfIn PDF document text
    • http://nalmpantistractors.gr/images/hacking-apps-for-roblox_GM431946152.pdfIn PDF document text
    • http://nalmpantistractors.gr/images/free-mods-for-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_002_off000033f1.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x33F1 26200 bytes
SHA-256: 961def0056c91f8e7b73a158585bf660d1adf557d8ed76da86b9aef588b5afa6
font_01_sfnt_off0000706c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x706C 18560 bytes
SHA-256: ebe7febd7c9c87dba90e20cfb7f210acfd9bc8f8383e28ef55b41a5f3c0fccc9

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