Malicious PDF — malware analysis report

Static analysis result for SHA-256 c31f0aa1e340349d…

MALICIOUS

PDF

36.5 KB Created: 2021-05-23 08:44:32 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 8fe826e76c2519f58eeff46504c32dfa SHA-1: aa9033c30b239bbea5fb53bfc31d50ed1bc24d7c SHA-256: c31f0aa1e340349d2adb5e5feb2bc4afa746ad309404dd1af664259ba6aac5ec
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to external websites, including one identified as a malicious redirector for game hacks. The document body explicitly mentions 'free generator' and 'game hack' lures, and includes a call-to-action phrase. While no scripts were directly extracted, the presence of embedded URLs and the nature of the lures suggest an attempt to redirect users to potentially malicious content or downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9492

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/479516143/how-to-get-free-minecraft-skins-game-hack In PDF document text
    • https://www.poc-helmet.com/ckfinder/userfiles/files/coin-master-card-hack-apk_GM406889139.pdfIn PDF document text
    • https://www.poc-helmet.com/ckfinder/userfiles/files/coin-master-free-spins-and-coins-blogspot_GM406889139.pdfIn PDF document text
    • https://www.poc-helmet.com/ckfinder/userfiles/files/how-can-u-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.poc-helmet.com/ckfinder/userfiles/files/download-hack-coin-master-apk_GM406889139.pdfIn PDF document text
    • https://www.poc-helmet.com/ckfinder/userfiles/files/roblox-free-models_GM431946152.pdfIn PDF document text
    • https://education.minecraftIn 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_002_off00003508.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3508 24724 bytes
SHA-256: 5a6e9ea4ab3ee1ca579bda3cf924d0f69f9aa3cf9f215b716d4a94fedfdc14a9
font_01_sfnt_off00006e00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E00 18044 bytes
SHA-256: 2e9033515f3ff21116dec08c3b5b633a0403805954c28c410ec38fa0176f1df4

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