Malicious PDF — malware analysis report

Static analysis result for SHA-256 a641a13f362eba15…

MALICIOUS

PDF

39.3 KB Created: 2021-05-10 18:01:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: d369f33911b74b0f7f9e4c8cdf5db882 SHA-1: e60a3aa6c47d76b09d2c0d804391f0739d0b54c9 SHA-256: a641a13f362eba15e339cdc39b5234f80d1b8260c5cba74c3c247caa9d3d2d3b
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that redirect to known malicious infrastructure, specifically advertising a 'free generator / game hack' for Coin Master. The document body text and heuristic firings confirm the presence of a malicious redirector designed to lure users into clicking the link. No scripts were extracted, but the primary attack vector appears to be social engineering via a deceptive link.

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/406889139/coin-master-spin-link-today-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_off0000334a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x334A 25216 bytes
SHA-256: dc2734e33c5ffa7ed95060f7713d6072041bca034c6f6bd7a53cb7848ee13509
font_01_sfnt_off00006dbb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6DBB 3000 bytes
SHA-256: 56ee3cf210babcab1d595ec3cc7d666f7a646b8ea00ab1e6563ebd84f84582f8
font_02_sfnt_off0000781a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x781A 18244 bytes
SHA-256: 07d8e2c3dd01b07826262084699e95bc4377ad43729695123e376372715a200b

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