Malicious PDF — malware analysis report

Static analysis result for SHA-256 17710b66bcfa2e32…

MALICIOUS

PDF

35.6 KB Created: 2021-05-21 09:27:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 2e5d9fcd657174013956763339bf9d59 SHA-1: 941215af4d72fb30f3b7ac6661ab13c79b13e259 SHA-256: 17710b66bcfa2e32aacafa81eb08157dfc86e73cf40bf03dbd5cc730a1fe792f
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 0.9492

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-roblox-hack-us-game-hack PDF link annotation
    • http://www.access-coiffure-tours.fr/images/strucid-aimbot_GM431946152.pdfIn PDF document text
    • http://www.access-coiffure-tours.fr/images/getrobux-now_GM431946152.pdfIn PDF document text
    • http://www.access-coiffure-tours.fr/images/free-robux-card-codes_GM431946152.pdfIn PDF document text
    • http://www.access-coiffure-tours.fr/images/get-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://www.access-coiffure-tours.fr/images/free-robux-no-verification-no-survey_GM431946152.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_off000031ae.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x31AE 24192 bytes
SHA-256: 61627a1b88e2fdf70632f4287c2e18494866f9f37a744a3b35101df4ef52868d
font_01_sfnt_off00006902.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6902 18532 bytes
SHA-256: 0d34e375d8902d3efa285fd24fab142d003833d4205c7dc9a730d4d831678389

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