Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc88edf41b3fe4fe…

MALICIOUS

PDF

39.9 KB Created: 2021-05-25 07:02:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 634f0b15c31e04cc486b7c517b17c7be SHA-1: d3a01800fcbfb77dd90e3452363b06da871666fc SHA-256: fc88edf41b3fe4fe54f961b1bc0ad7aa36d4cbceb28f56337e8784fe41326d25
200 Risk Score

Malware Insights

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

The PDF document contains multiple links and calls to action designed to trick users into believing they can obtain free Robux or game hacks, while impersonating the Apple brand. The primary link, https://netcdn.xyz/app/431946152/get-free-robux-game-hack, is associated with known malicious redirector infrastructure. The document body and heuristics indicate a lure for credential phishing or potentially a download of a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8068

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/get-free-robux-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/get-free-robux-game-hack In PDF document text
    • http://zagi.hr/files/free-robux-apps-that-work_GM431946152.pdfIn PDF document text
    • https://www.zagi.hr/files/free-robux-hacks-no-verification_GM431946152.pdfIn PDF document text
    • https://www.zagi.hr/files/how-to-hack-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • https://www.zagi.hr/files/how-to-get-free-robux-easy_GM431946152.pdfIn PDF document text
    • https://www.zagi.hr/files/free-tiktok-comments_GM835599320.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
stream_002_off000033a0.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x33A0 25716 bytes
SHA-256: 31f9b81a613671da9c7391f580d8eae1fe2cafb0d4c52b6f4b885498285594cc
font_01_sfnt_off00006f30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F30 3500 bytes
SHA-256: e49a868379cd3c37e631c5a53c010e21f38d803532a2b8417aee82315d4e8634
font_02_sfnt_off00007ad1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7AD1 18120 bytes
SHA-256: 79ac164380d838bf2943c127f808202d45f8751c05dbd036140e6fb9b1b49848