Malicious PDF — malware analysis report

Static analysis result for SHA-256 d06de57111bca7dc…

MALICIOUS

PDF

39.4 KB Created: 2021-05-16 03:00:15 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 702ad3d4d1e00f65e58b7fec6b075091 SHA-1: accc7974711777d76ea57f1bda5050107ac5724d SHA-256: d06de57111bca7dc58079d922f19fef10d151e120e4c7797274139c9a6388da2
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that redirect to a website offering a "Blox Land Free Robux" generator, a common lure for phishing or malware distribution. The heuristic firings confirm the presence of malicious redirector links and a download button lure. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to trick the user into visiting a malicious site, likely to download a secondary payload or phish for credentials.

Machine Learning

  • Nyx PDF Classifier clean score 0.0128

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.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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/blox-land-free-robux-game-hack In 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_off000030f8.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x30F8 23444 bytes
SHA-256: f2d1e18c98396606f946f49141dd3c4a9a8256434c9b65985ad8d88c416935b4
font_01_sfnt_off000065f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65F0 7336 bytes
SHA-256: 472d361253ef611798c4d964907ce69dd374df1729a26df8eb5dbe530fabc5ed
font_02_sfnt_off0000779e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x779E 18492 bytes
SHA-256: 43325585731fb5abef9629b4ee3027de7c41cdd34c16702b82f5d396e8a55598

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