Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef3cb07468a3556f…

MALICIOUS

PDF

33.6 KB Created: 2021-07-21 16:41:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 730819777d0947d626eb45610969c1a7 SHA-1: 29192056ac5aec5512954a67cc68d1709db2ed2b SHA-256: ef3cb07468a3556f96623e8de75c35c887cf08b0e0059735411e219e269421a8
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that redirect to known malicious infrastructure, specifically promoting 'game hacks' and 'generators'. The document body and heuristics indicate a lure for users to click these links, likely leading to further malware or phishing attempts. Although no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a malicious redirector workflow.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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/how-to-get-minecraft-for-free-on-android-game-hack In PDF document text
    • http://www.middleeastautorepair.com/uploaded_files/userfiles/files/minecraft-mobile-free_GM479516143.pdfIn PDF document text
    • http://www.middleeastautorepair.com/uploaded_files/userfiles/files/how-to-get-free-robux-without-verification-or-surveys_GM431946152.pdfIn PDF document text
    • http://www.middleeastautorepair.com/uploaded_files/userfiles/files/www-free-robux_GM431946152.pdfIn PDF document text
    • http://www.middleeastautorepair.com/uploaded_files/userfiles/files/minecraft-noob-vs-pro-vs-hacker-vs-god_GM479516143.pdfIn PDF document text
    • http://www.middleeastautorepair.com/uploaded_files/userfiles/files/free-minecraft-skin-maker_GM479516143.pdfIn PDF document text
    • http://www.middleeastautorepair.com/uploaded_files/userfiles/files/can-you-make-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • http://www.middleeastautorepair.com/uploaded_files/userfiles/files/coin-master-free-link_GM406889139.pdfIn PDF document text
    • http://www.middleeastautorepair.com/uploaded_files/userfiles/files/coin-master-free-spin-and-coin_GM406889139.pdfIn PDF document text
    • http://www.middleeastautorepair.com/uploaded_files/userfiles/files/roblox-hacks-2021_GM431946152.pdfIn PDF document text
    • http://www.middleeastautorepair.com/uploaded_files/userfiles/files/how-to-get-free-robux-for-real_GM431946152.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_off00002f47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F47 22680 bytes
SHA-256: e987dddf192647ec303cadfe5f1efb7c8387b3391216da8351674c9158b99008
font_01_sfnt_off000061e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61E6 18048 bytes
SHA-256: 8059851acc98585c267d1a0730441da2490f7a27bb6efaac05b05bf58a4bb166