Malicious PDF — malware analysis report

Static analysis result for SHA-256 9cf3f2c66f69ea92…

MALICIOUS

PDF

38.8 KB Created: 2021-05-21 13:02:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 7d54a3b216f9a5112caea330002d9df6 SHA-1: 573cb2a6c5584d44cf09998b2a7c3ed0cfadd8c6 SHA-256: 9cf3f2c66f69ea92fea1cbe54c8ed5801620f524f6655420f54bdb07d7f46fd4
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure related to 'free Robux' and game hacks, directing users to external URLs that are likely malicious. The presence of embedded URLs and the ML classifier's high confidence score indicate a malicious intent, possibly to deliver a second-stage payload or lead the user to a phishing site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8060

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/ways-to-get-free-robux-2021-game-hack PDF link annotation
    • http://mypizzaoven.com/images/how-can-i-get-free-robux_GM431946152.pdfIn PDF document text
    • http://mypizzaoven.com/images/coin-master-daily-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
    • http://mypizzaoven.com/images/coin-master-ultra-attack-hack_GM406889139.pdfIn PDF document text
    • http://mypizzaoven.com/images/http-bit-ly-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://mypizzaoven.com/images/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00003265.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3265 25184 bytes
SHA-256: 510808f5bc8b67118fccc532d97e9842b168c1c6c987d288ecf9c0f0d18e3595
font_01_sfnt_off000069c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x69C1 2840 bytes
SHA-256: 3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676
font_02_sfnt_off00007372.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7372 19128 bytes
SHA-256: 23f4c6d0bfdce0b55b29b4c4e1f8fc5f357783b93db13de52c4fadcc57c1eadd

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