Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8b37dbe4470536f…

MALICIOUS

PDF

34.3 KB Created: 2021-07-20 01:01:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 2e15186ea17508701ad6703de9b23513 SHA-1: 569754458724b1b6d2ebf4d19e8b3c4c67130c95 SHA-256: f8b37dbe4470536f710eb9fb32936002bbb725e2ec3f2adac56b418fc088883d
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including one pointing to a known malicious redirector at http://netcdn.tw/app/479516143/minecraft-ps4-free-game-hack. The document body and embedded links suggest a lure for game-related cheats or currency, a common social engineering tactic. While no scripts were explicitly extracted, the PDF structure and embedded links indicate a potential for malicious redirection or download, aligning with T1059.007 if JavaScript were present, and T1566.001 for the delivery vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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 http://netcdn.tw/app/479516143/minecraft-ps4-free-game-hack In PDF document text
    • https://jdclassicautoparts.com/image/data/files/free-robux-with-no-verification_GM431946152.pdfIn PDF document text
    • https://jdclassicautoparts.com/image/data/files/apps-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://jdclassicautoparts.com/image/data/files/coin-master-free-blogspot_GM406889139.pdfIn PDF document text
    • https://jdclassicautoparts.com/image/data/files/roblox-fun-com-free-robux_GM431946152.pdfIn PDF document text
    • https://jdclassicautoparts.com/image/data/files/free-minecraft-resource-packs_GM479516143.pdfIn PDF document text
    • https://jdclassicautoparts.com/image/data/files/roblox-fly-hack_GM431946152.pdfIn PDF document text
    • https://jdclassicautoparts.com/image/data/files/mine-minecraft-games-for-free_GM479516143.pdfIn PDF document text
    • https://jdclassicautoparts.com/image/data/files/claim-free-robux_GM431946152.pdfIn PDF document text
    • https://jdclassicautoparts.com/image/data/files/is-tiktok-free_GM835599320.pdfIn PDF document text
    • https://jdclassicautoparts.com/image/data/files/get-free-likes-on-tiktok_GM835599320.pdfIn 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_off000032c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x32C3 22748 bytes
SHA-256: 497dac31d0248a19f49bd1914640a4231bbdb531bfd2a607ce7e78a3f219baec
font_01_sfnt_off000065af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65AF 17784 bytes
SHA-256: eb08404513e1de89cb797b3c4bca4c8ebf2d802e230ebef8911427dd20e63131

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