Malicious PDF — malware analysis report

Static analysis result for SHA-256 58256e28a7b89d56…

MALICIOUS

PDF

28.1 KB Created: 2021-07-05 16:20:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: d84719725555efbea69bed04e733db74 SHA-1: 8b39e806d989f167dc0055f83b5113b818d418f1 SHA-256: 58256e28a7b89d56945260b8031c3dd6f24079ff8155ba8da8a2f253b6d7c6a4
170 Risk Score

Malware Insights

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

The PDF file contains a lure impersonating PayPal and offering a "Roblox generator hack" to entice users to click a link. This link redirects to malicious infrastructure, indicating a phishing or credential harvesting attempt. The embedded URL is the primary indicator of compromise.

Machine Learning

  • Nyx PDF Classifier clean score 0.0330

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: http://netcdn.tw/app/431946152/comment-hacker-le-cataloggue-de-roblox-2021-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 http://netcdn.tw/app/431946152/comment-hacker-le-cataloggue-de-roblox-2021-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
font_00_sfnt_off0000172e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x172E 21968 bytes
SHA-256: a56e2a4a934d9db2c7c70d8f2ae80b3c982b5b8026ad9edd2ceb8a97f1767b4b
font_01_sfnt_off0000481e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x481E 19728 bytes
SHA-256: 8ca1fc1dd690531318800091e885cd18db401d0a820d77f0864564244080e128

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