Malicious PDF — malware analysis report

Static analysis result for SHA-256 75e3884a604da290…

MALICIOUS

PDF

32.1 KB Created: 2021-07-19 09:13:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 5fd0816c53fccc12510f1b28c4578c8a SHA-1: 588b09a023b5edcaef5c65ab820bbe6ffa637cdf SHA-256: 75e3884a604da290cc6db4449d3e2f204e4134c7bf9cb6d84ae60fa372c6551f
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a critical heuristic firing for a redirector link, specifically pointing to 'http://netcdn.tw/app/835599320/free-tiktok-followers-generator-game-hack'. This URL is associated with a 'free generator / game hack' lure, indicating a social engineering attempt to trick users into visiting malicious infrastructure. The document body also contains similar text and URLs, reinforcing the phishing pretext. No scripts were extracted, but the primary attack vector appears to be a malicious link within the document.

Machine Learning

  • Nyx PDF Classifier clean score 0.0622

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/835599320/free-tiktok-followers-generator-game-hack In 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_off00002913.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2913 23200 bytes
SHA-256: 651f601418ccfa45e124c4e2a81b2305b7541e3c68fc78e0925bd0179ceda513
font_01_sfnt_off00005d4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D4D 17924 bytes
SHA-256: 15e81544c7296339f60406a70d440ba472803439c3c01f92585f07e7e66dad8a

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