Malicious PDF — malware analysis report

Static analysis result for SHA-256 43c6e7a3bfb2591c…

MALICIOUS

PDF

40.1 KB Created: 2021-05-22 07:13:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 532a296aa20664ea91ec434e2b7a48cd SHA-1: d988beae912fd26bdbdc54e7bf08b1c99ba07dbb SHA-256: 43c6e7a3bfb2591c09831c9d47ea4495b02b69e596e20585d51d5c98dd124942
160 Risk Score

Malware Insights

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

The PDF contains multiple links to known malicious redirectors, masquerading as generators for in-game currency like Robux. The document body and heuristics indicate a lure to download or access these 'generators', which likely lead to further malicious content or exploits. No scripts were extracted, but the PDF structure and embedded URLs strongly suggest a phishing or social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8018

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/apps-to-get-free-robux-game-hack In PDF document text
    • https://itv-grabungen.de/images/how-to-make-a-free-server-in-minecraft-java_GM479516143.pdfIn PDF document text
    • https://itv-grabungen.de/images/100-hack-coin-master_GM406889139.pdfIn PDF document text
    • https://itv-grabungen.de/images/minecraft-for-macbook-free_GM479516143.pdfIn PDF document text
    • https://itv-grabungen.de/images/free-roblox-adopt-me-accounts_GM431946152.pdfIn PDF document text
    • https://itv-grabungen.de/images/robux-com-free-robux_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000032b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x32B3 27520 bytes
SHA-256: e6d04d4f70e0b48710f352d72e0f7c9415246b6cfbf283572c4701f349c42880
font_01_sfnt_off00007154.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7154 2832 bytes
SHA-256: 77ae1c4cffa647a8fd533dfa4102e94364989f9e80b9cd131876e9d1005899a2
font_02_sfnt_off00007b05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B05 18292 bytes
SHA-256: b4e5860ebf2343f9b18b94d86a305cbc7e8ebd2f2a6bfe7ceeed88b67548d8bf

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