Malicious PDF — malware analysis report

Static analysis result for SHA-256 282add9227dbbef4…

MALICIOUS

PDF

29.9 KB Created: 2021-07-19 08:20:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: bade7b86e0c3ff0398fef22a08a19c29 SHA-1: 36bc566b197dfaae5c0440b148fd8a35c90a95b6 SHA-256: 282add9227dbbef4638f73ac03e45fc96b004ea6ba9865dbc03a4e6ae7e99277
160 Risk Score

Malware Insights

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

The PDF contains multiple links and document body text promoting a "Free Robux Generator" and "Game Hack". These links redirect to known malicious infrastructure, indicating a phishing or scam attempt. The ML classifier also flagged the PDF as malicious, supporting this assessment. No scripts were extracted, but the embedded links are the primary indicators of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8523

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/431946152/free-robux-generator-game-hack In PDF document text
    • https://elma.alazhar.sch.id/__statics/gudangsoal/files/how-to-get-minecraft-windows-10-for-free_GM479516143.pdfIn PDF document text
    • https://elma.alazhar.sch.id/__statics/gudangsoal/files/coin-master-free-spins-2021_GM406889139.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_off00002066.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2066 22408 bytes
SHA-256: 404ef22057418594c43b9e7fa4fea2420e16e330d570cbcb6f861ad40e6914a6
font_01_sfnt_off0000526a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x526A 18532 bytes
SHA-256: ba22abd6f88899881db5d4d0465c23164dfc0545b5713a28f720191bec243a36

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