Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc2e63e439d7c313…

MALICIOUS

PDF

37.6 KB Created: 2021-05-14 21:17:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: a47b4e4afe551af03911f9096b38bae4 SHA-1: b4aeefaf600ce7b2602df8e68885baaeb7839e2f SHA-256: bc2e63e439d7c313e42dbc2fccef87ad34ab37b9fbf76ad98ae279d454cde1eb
170 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1071.001 Web Protocols

The PDF file contains embedded links that redirect to a malicious domain, identified as a known redirector infrastructure. The content impersonates Microsoft and uses a 'game hack' lure to trick users into clicking the link, which likely leads to credential harvesting. The document's authoring application, wkhtmltopdf, and the presence of embedded URLs suggest a potential for client-side exploitation or redirection to a phishing page.

Machine Learning

  • Nyx PDF Classifier clean score 0.0334

Heuristics 5

  • 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.
  • Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: https://netcdn.xyz/app/431946152/hacks-para-roblox-game-hack.
  • 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/hacks-para-roblox-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_off000032b6.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x32B6 27804 bytes
SHA-256: 36cbb646a7d53c717013ab1d04d06d5cf9a17fe4820e1ecad4191f43ba36c868
font_01_sfnt_off00007190.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7190 18336 bytes
SHA-256: 2c3591d0816fe2ec07885ff461cab1f1278707ef551a51e26631ad2b93349e2a

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