Malicious PDF — malware analysis report

Static analysis result for SHA-256 04c705bc28c724b7…

MALICIOUS

PDF

40.3 KB Created: 2021-04-22 16:17:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-23
MD5: d85ec210744dec0532c8eab15e35970d SHA-1: e0c7dc5e8e43a14223f44b6108b772bae2f8e3c9 SHA-256: 04c705bc28c724b7adf103ba65474b6f3574501825c1fbdb5efd157c0a8e9f6e
72 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure for 'Free Robux Gift Cards Code 2021' and a prominent call to action linking to a suspicious URL. This URL, along with another embedded URL, suggests a phishing or scam attempt designed to trick users into visiting potentially malicious sites. The document's structure and content indicate it's intended as a malicious attachment.

Machine Learning

  • Nyx PDF Classifier clean score 0.0228

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • 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://netsecure.pro/app/431946152/free-robux-gift-cards-code-2021-game-hack PDF link annotation
    • https://kitchenset-jogja.com/ckfinder/userfiles/files/how-to-get-free-robux-combo.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_003_off00003654.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3654 24880 bytes
SHA-256: 8a5e83ae8673f467742c2e8abb389ec34271c37e33e641f8c9f83057edbc0c10
font_01_sfnt_off00006fab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6FAB 2832 bytes
SHA-256: 77ae1c4cffa647a8fd533dfa4102e94364989f9e80b9cd131876e9d1005899a2
font_02_sfnt_off0000795c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x795C 19044 bytes
SHA-256: a83203ba6d4d8e4db234da74518c811315008a13a6a61ff598d06d89853e7c2b

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