Malicious PDF — malware analysis report

Static analysis result for SHA-256 65c31009aa588469…

MALICIOUS

PDF

36.9 KB Created: 2021-05-15 10:30:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 64054dce46232fea484fe37e32906164 SHA-1: c9a95d9ea3c5b3dcd1b6d9b8b0889fe6c132ee52 SHA-256: 65c31009aa588469dd89c6e25001366687d23770ea7fe13225e19caa899d968d
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a malicious link disguised as a game hack generator, which is a common lure for phishing attacks. The heuristic firings indicate that the PDF links to known malicious redirector infrastructure. Although no scripts were extracted, the embedded URL is the primary indicator of malicious intent, likely leading to a second-stage download.

Machine Learning

  • Nyx PDF Classifier clean score 0.0313

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/free-coin-master-hacks-no-verification-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_off00003497.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3497 26768 bytes
SHA-256: afcf67aa3c4d39686a7c79f1556dcb58f5d72609c2d4ffa5c33893038b958f22
font_01_sfnt_off00006feb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6FEB 18016 bytes
SHA-256: 22df04c4dacbc852f4ecaf83adb1826ed6293343c5161e377e09b669fc2092ee

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