Malicious PDF — malware analysis report

Static analysis result for SHA-256 72cfdbe157a1219e…

MALICIOUS

PDF

39.0 KB Created: 2021-05-22 22:06:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: de7bdc8ab471d1cf143c625f4e5293c5 SHA-1: bd49180a489fc42f01af39995dd5e18ef1b3d60c SHA-256: 72cfdbe157a1219e1bb314e3fa41d6683b8bbba6b58c5dd9e119cdbfe0e01b0c
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, specifically promoting 'free generators' or 'game hacks' to entice users. The document body and heuristics indicate a lure designed to lead users to click these links, which are associated with malicious infrastructure. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9476

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/get-minecraft-for-free-game-hack In PDF document text
    • https://foc.vn/public/upload/files/how-do-you-get-free-food-in-coin-master_GM406889139.pdfIn PDF document text
    • https://foc.vn/public/upload/files/can-you-give-me-free-robux_GM431946152.pdfIn PDF document text
    • https://foc.vn/public/upload/files/pubg-uc-kaise-khariden_GM1330123889.pdfIn PDF document text
    • https://foc.vn/public/upload/files/80-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://foc.vn/public/upload/files/coin-master-daily-free-spins-link-facebook_GM406889139.pdfIn 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_off00003527.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3527 30444 bytes
SHA-256: a6d4786d4a0922034bdf9fc2900afdf0d99181cae76308be0cffe295e3f522e2
font_01_sfnt_off0000793a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x793A 17712 bytes
SHA-256: 35f99bfb73b52248bbdf58e6e807942ea3200a6c0759a8418b864f3a1fae0a50

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