Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d4b1cd924d1bc5a…

MALICIOUS

PDF

38.5 KB Created: 2021-05-21 12:02:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 3b1b6330066ef18a9bfadcbe1e5465e5 SHA-1: 7e466c644fb9fbc61180ce06be2a401eaa1f026a SHA-256: 9d4b1cd924d1bc5abde1f0173d44125bc9866e9e741fff7ee2d954273fbdaf33
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. The document body and heuristics indicate a lure for 'free Robux' or game hacks, a common social engineering tactic. The embedded links likely lead to phishing sites or malware downloads, attempting to exploit user interest in free in-game items.

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/431946152/free-robux-images-game-hack In PDF document text
    • http://gaeconsultores.cl/images/free-spin-coin-master-ios_GM406889139.pdfIn PDF document text
    • http://gaeconsultores.cl/images/how-to-get-free-spins-in-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://gaeconsultores.cl/images/how-to-get-free-robux-easy-no-download_GM431946152.pdfIn PDF document text
    • http://gaeconsultores.cl/images/how-to-hack-a-roblox-account-easy_GM431946152.pdfIn PDF document text
    • http://gaeconsultores.cl/images/martian-lettuce-coin-master-free_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_off000032fd.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x32FD 27892 bytes
SHA-256: 2880bc9ce2a0b91ff7266005816a6b4f495a344e5fe9bf5743396919dbd5f56c
font_01_sfnt_off000073a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x73A6 18792 bytes
SHA-256: a2580c58451f3b1d88c8ceab1016c43f7244c9e681afad5968b7c22bbe0132ae

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