Malicious PDF — malware analysis report

Static analysis result for SHA-256 af9a69b33ac493cd…

MALICIOUS

PDF

43.8 KB Created: 2021-05-14 08:03:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 9951fb994387e18c81483104ab2ebfb1 SHA-1: d3643adf3c44c6f43965540b241c0d9825bb2baa SHA-256: af9a69b33ac493cdc9517b30840dcdba9b6225fb065328de26d2527d008aa594
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious Link

This PDF document was flagged as malicious. It uses a fake-CAPTCHA lure. 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 clean score 0.0142

Heuristics 5

  • 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.
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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/roblox-promo-codes-for-free-robux-game-hack PDF link annotation
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00003584.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3584 24612 bytes
SHA-256: a67a45905e816ee09cd08b3f0362924f5e90d794111ee989be679fc760e09375
font_01_sfnt_off00006e1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E1E 8132 bytes
SHA-256: e6d68e720ea5acf9dccbf7ffde18db6f65c62a99ab7725aa43e30329033a7787
font_02_sfnt_off0000890b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x890B 18676 bytes
SHA-256: 3ed324e585500d41944ebd93500991c566830021fec9c5a8323b790459c3443f

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