Malicious PDF — malware analysis report

Static analysis result for SHA-256 7fb123b863f5aa42…

MALICIOUS

PDF

29.3 KB Created: 2021-07-18 23:21:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 19acc057d882fd5be90d6de078b586f0 SHA-1: 2d1739153022bee4189f044d5e8b61abea498181 SHA-256: 7fb123b863f5aa422402ae59e87e310b4d2cdff4d09b703799adb0d0e9a8327d
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains multiple heuristics indicating malicious redirector links, specifically luring users with game hack themes. The document body and embedded URLs reinforce this, pointing to a malicious redirector at http://netcdn.tw/app/479516143/how-to-get-minecraft-for-free-on-mobile-game-hack. This suggests the primary goal is to redirect users to potentially malicious websites for further exploitation or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8499

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 http://netcdn.tw/app/479516143/how-to-get-minecraft-for-free-on-mobile-game-hack In PDF document text
    • https://www.fubode.org/images/rbxfree-com-free-robux_GM431946152.pdfIn PDF document text
    • https://www.fubode.org/images/get-free-tiktok-followers_GM835599320.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
font_00_sfnt_off00002371.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2371 21304 bytes
SHA-256: f6fd05030f5b7fc7b970d90c0094cf9119e710e7eaf795e5d48d2c79aaf8304c
font_01_sfnt_off00005183.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5183 18104 bytes
SHA-256: 355b14cb1237cfcb324f2687d1fc3cafef0ca686705333751d3cf0333155011f

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