Malicious PDF — malware analysis report

Static analysis result for SHA-256 ecfaccead1065e81…

MALICIOUS

PDF

37.4 KB Created: 2021-05-21 08:59:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 2cbf0a2339d3e819ae50e5ac97ef6318 SHA-1: edad8cab29be90292f2f640ef6ac3dbb674859be SHA-256: ecfaccead1065e81c7626c4e6bf8fcd91853e9cb7e0e3633ce634e3d9e742045
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, specifically advertising free game hacks and generators. The document body includes text and links related to 'Minecraft Ps4 Free' and a 'CLICK HERE TO ACCESS MINECRAFT GENERATOR' call to action, reinforcing the lure. The presence of embedded URLs and the ML classifier's flagging indicate a high likelihood of malicious intent, likely to lead users to a phishing or malware download site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7010

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/minecraft-ps4-free-game-hack In PDF document text
    • http://centuriatus.com/images/unlimited-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://centuriatus.com/images/how-to-get-free-robux-games_GM431946152.pdfIn PDF document text
    • http://centuriatus.com/images/can-you-actually-get-free-robux_GM431946152.pdfIn PDF document text
    • http://centuriatus.com/images/spin-links-for-coin-master_GM406889139.pdfIn PDF document text
    • http://centuriatus.com/images/coin-master-free-link_GM406889139.pdfIn 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_002_off00003275.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3275 23880 bytes
SHA-256: 41a9789972c73690842825b3956c57baf6cb49d8379963f6ae94de9e93f0123c
font_01_sfnt_off000068b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x68B4 2820 bytes
SHA-256: 972979c3a46100cf5f8fd289bc6fbd2496ff75fec0e3f6753648c72ec6eba714
font_02_sfnt_off00007254.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7254 17784 bytes
SHA-256: eb08404513e1de89cb797b3c4bca4c8ebf2d802e230ebef8911427dd20e63131

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