Malicious PDF — malware analysis report

Static analysis result for SHA-256 40e87f14451b4a76…

MALICIOUS

PDF

33.0 KB Created: 2021-07-05 09:01:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 30842f343719752a6941e17c16f67ca1 SHA-1: 0bea6b3d78dc27e348323bc1c39e21c95c8572ba SHA-256: 40e87f14451b4a76ef2da0d6f61afdecde68124abf8d8f9d4e8b429a5f20cb61
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs that redirect to a known malicious infrastructure, specifically advertising free Robux and game hacks. The heuristic firings confirm the presence of malicious redirector links and a lure for game-related exploits. While no scripts were extracted, the document's structure and embedded URLs strongly suggest it is designed to lead the user to a malicious website for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9824

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/431946152/blox-land-free-robux-game-hack In PDF document text
    • https://e-learning-man2jakarta.com/__statics/gudangsoal/files/roblox-free-army-shirt_GM431946152.pdfIn PDF document text
    • https://e-learning-man2jakarta.com/__statics/gudangsoal/files/free-robux-valid-codes-2021_GM431946152.pdfIn PDF document text
    • https://e-learning-man2jakarta.com/__statics/gudangsoal/files/free-account-roblox-wiki_GM431946152.pdfIn PDF document text
    • https://e-learning-man2jakarta.com/__statics/gudangsoal/files/how-to-exploit-on-roblox-cheat-engine_GM431946152.pdfIn PDF document text
    • https://e-learning-man2jakarta.com/__statics/gudangsoal/files/best-roblox-hacks_GM431946152.pdfIn PDF document text
    • https://e-learning-man2jakarta.com/__statics/gudangsoal/files/hacking-roblox-reddit_GM431946152.pdfIn PDF document text
    • https://e-learning-man2jakarta.com/__statics/gudangsoal/files/the-final-stand-2-roblox-cheat_GM431946152.pdfIn PDF document text
    • https://e-learning-man2jakarta.com/__statics/gudangsoal/files/youtube-roblox-dax-she-cheated-roblox-code_GM431946152.pdfIn PDF document text
    • https://e-learning-man2jakarta.com/__statics/gudangsoal/files/roblox-hack-robux-cheat-engine_GM431946152.pdfIn PDF document text
    • https://e-learning-man2jakarta.com/__statics/gudangsoal/files/city-life-man-roblox-free_GM431946152.pdfIn PDF document text
    • https://e-learning-man2jakarta.com/__statics/gudangsoal/files/free-rs999-999-999-on-roblox_GM431946152.pdfIn PDF document text
    • https://e-learning-man2jakarta.com/__statics/gudangsoal/files/roblox-legendary-swords-rpg-level-hack_GM431946152.pdfIn PDF document text
    • https://e-learning-man2jakarta.com/__statics/gudangsoal/files/free-spins-link-in-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://e-learning-man2jakarta.com/__statics/gudangsoal/files/eas-robux-free_GM431946152.pdfIn PDF document text
    • https://e-learning-man2jakarta.com/__statics/gudangsoal/files/coin-master-hack-download-2021_GM406889139.pdfIn PDF document text
    • https://e-learning-man2jakarta.com/__statics/gudangsoal/files/free-robux-batu-kol-faki_GM431946152.pdfIn PDF document text
    • https://e-learning-man2jakarta.com/__statics/gudangsoal/files/how-to-get-free-funds-on-roblox_GM431946152.pdfIn PDF document text
    • https://e-learning-man2jakarta.com/__statics/gudangsoal/files/free-robux-esy_GM431946152.pdfIn PDF document text
    • https://e-learning-man2jakarta.com/__statics/gudangsoal/files/free-spins-coin-master-2021-today_GM406889139.pdfIn PDF document text
    • https://e-learning-man2jakarta.com/__statics/gudangsoal/files/how-do-i-earn-robux_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_off00002b7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2B7C 22296 bytes
SHA-256: 2502228e5c70b9a0be30326c2fd19b87b5a3288b08a4c7b0dc6c9ecc831cb208
font_01_sfnt_off00005c92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C92 18964 bytes
SHA-256: 3f12ef93e3f94e19068a8415642f40f3a4d95b4d38f37f1bdada02c05cec8b59

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