Malicious PDF — malware analysis report

Static analysis result for SHA-256 43dbac0e86a463de…

MALICIOUS

PDF

38.3 KB Created: 2021-05-10 17:00:42 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 689c3459ce5beedc04bcb740c3935b48 SHA-1: 8c1872e3bc84bdd85b1cfab60c4664b7d9d839f7 SHA-256: 43dbac0e86a463dee89bae85a37974bb8bb2efcd117917f215300804a4f0415d
130 Risk Score

Malware Insights

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

The PDF document contains embedded links that redirect to known malicious infrastructure, specifically promoting a 'free Robux generator' lure. The document body and heuristics indicate a social engineering tactic to trick users into clicking these links. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to lead the user to a malicious website, likely for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier clean score 0.0334

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-can-you-get-free-robux-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_003_off00003549.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3549 26780 bytes
SHA-256: 8c5db57d8babd5aaf2420e8d0de8b2e52a296b9f7680b7dfb65ec17bd072ef61
font_01_sfnt_off0000734a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x734A 18672 bytes
SHA-256: b25769fe22a84510cbe545ecc77c61068e90e31ebb29fb78564d629eaf3a10b0

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