Malicious PDF — malware analysis report

Static analysis result for SHA-256 62a9147f5241ce92…

MALICIOUS

PDF

28.3 KB Created: 2021-07-20 15:44:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: a922f78cbb5d6e0c2814de4283d658f4 SHA-1: 6484d52829eee0a4e74aff04ba78702a9645750a SHA-256: 62a9147f5241ce920262fb5c14fcb6eb2a6615072b7e227c63ecebcb035d7a8d
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that redirect to known malicious infrastructure, specifically advertising a 'free generator / game hack'. The document body also contains similar calls to action and the embedded URL. This indicates a phishing or scam attempt designed to lure users to a malicious site.

Machine Learning

  • Nyx PDF Classifier clean score 0.0329

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-fans-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
stream_002_off00001d80.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x1D80 22168 bytes
SHA-256: d84447993fd6d644c4b673fb60e10c9dd9827bc1d67bb69ff73ef09e9acf0c25
font_01_sfnt_off00004e9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4E9B 17684 bytes
SHA-256: 9a08de3b0af5ab49577e5f4245d13b378d625872d2828bf675c34a9d6b9d0b04

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