Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f6261128d31e6d5…

MALICIOUS

PDF

37.3 KB Created: 2021-05-21 07:20:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 703c474ec450c3df631aeaaf46d39be8 SHA-1: 250026b6f629e276529a4e7a95c88cb5787846b4 SHA-256: 2f6261128d31e6d52b6b8417ac64e7d1cbb6afacce3e0fe12b35b2d3abcfcb83
130 Risk Score

Malware Insights

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

The PDF contains a lure for free game currency, directing users to a known malicious redirector URL. This suggests a phishing or scam attempt designed to lead users to potentially harmful content or further exploitation. The embedded URL is the primary indicator of malicious intent.

Machine Learning

  • Nyx PDF Classifier clean score 0.0739

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/how-to-get-free-robux-on-android-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_off0000314e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x314E 26656 bytes
SHA-256: 13ea488ddab3b8f5c8e7ebfe5bdebe4f99896fe8c847b61ae54e6e680b9db51d
font_01_sfnt_off00006fdb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6FDB 18576 bytes
SHA-256: be12fe34256d848f1a7db569f7882c3333b0548de7731ecd127307da0fa566a6

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