Malicious PDF — malware analysis report

Static analysis result for SHA-256 24c7bd80a883743e…

MALICIOUS

PDF

39.8 KB Created: 2021-05-22 17:34:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 509db6c0921093f0b16ad5f099e9fdef SHA-1: cfbb6610fba2a5a14cb299918ad16f5c6ddce09a SHA-256: 24c7bd80a883743e310cfe02f461b23cd7f959c1b0d8b98a8fd47cb64e73a495
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains embedded links that redirect to malicious infrastructure, specifically a lure for a 'free generator / game hack'. The heuristic firings indicate that the PDF links to known malicious redirectors and presents a visual download button. While no scripts were explicitly extracted, the nature of the PDF and its embedded links suggests an attempt to trick the user into navigating to a malicious site, likely to download further malware.

Machine Learning

  • Nyx PDF Classifier clean score 0.0272

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/roblox-pink-free-robux-game-hack In PDF document text
    • https://plumbingmedics.com/images/minecraft-for-laptop-free_GM479516143.pdfIn PDF document text
    • https://www.bandicam.comIn 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_off00002d26.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2D26 27020 bytes
SHA-256: 3a1f731628b5156bab5d94e48d0552fba54c0a87c3bae70a55bdfd2ddb6ffd8b
font_01_sfnt_off000069f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x69F8 4660 bytes
SHA-256: b8980cdac4d025496d9fe039d8c05bb5b9bae1b804244a1f9c05e9663db72816
font_02_sfnt_off00007a09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A09 18532 bytes
SHA-256: 62e9169d40109a3abf4bdf842601a34c83c90693a7fee2a3f682a11a81f7ba3a

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