Malicious PDF — malware analysis report

Static analysis result for SHA-256 952b6e5fbc61daaf…

MALICIOUS

PDF

35.7 KB Created: 2021-05-12 02:02:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-31
MD5: dd581e25ac77bb8d0fbddd7ef677fc05 SHA-1: e850c963e6296199acb4b5a7fe8ab501a281e404 SHA-256: 952b6e5fbc61daaf52b53021a1c1429573189b288387df1826ae2837acc0cbc1
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a malicious redirector link disguised as a "free generator / game hack" for Coin Master. The document body and heuristics indicate a lure to a known malicious URL, likely intended to lead users to a phishing or malware download site. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

Machine Learning

  • Nyx PDF Classifier clean score 0.0265

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_off00003306.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3306 24928 bytes
SHA-256: e131c454c5197d66e6d82387551ff8aab014226470d30e0e936502a7cbdb4d5c
font_01_sfnt_off00006b70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B70 17872 bytes
SHA-256: 51f02da227d0679d4a4cca1b372203100e5a9ff6587b3c267ccf786d3222cbcf

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