Malicious PDF — malware analysis report

Static analysis result for SHA-256 6dc7a0b67f1f243a…

MALICIOUS

PDF

36.5 KB Created: 2021-05-13 11:38:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 0f517926730a9c962eb20277d2c046c5 SHA-1: c59ff61e9fb4ae06d9edd9ed8a0d6c8bf9abd681 SHA-256: 6dc7a0b67f1f243a2d6fffe2091f2e4e8a9d5b10621cf17a8969ee103750900a
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains embedded links that redirect to known malicious infrastructure, specifically advertising a "free generator / game hack" for Coin Master. The heuristic firings indicate this is a critical lure and a malicious redirector. While no scripts were directly extracted, the PDF structure and embedded links suggest an attempt to exploit users through deceptive content, likely leading to further malicious downloads or phishing pages.

Machine Learning

  • Nyx PDF Classifier clean score 0.0312

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/406889139/how-to-get-free-coins-on-coin-master-game-hack In PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000033ed.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x33ED 25836 bytes
SHA-256: ac6a70f575b075f7570ec34dd3e6143da331b14bb9834e8061354b809cee669b
font_01_sfnt_off00006eba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6EBA 17872 bytes
SHA-256: 51f02da227d0679d4a4cca1b372203100e5a9ff6587b3c267ccf786d3222cbcf

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