Malicious PDF — malware analysis report

Static analysis result for SHA-256 32cb40e735a8239b…

MALICIOUS

PDF

33.1 KB Created: 2021-07-05 04:09:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 7bd6b4b2dc45936012a432130239d197 SHA-1: b2ccb542163c4a3e98d2fe0c3a2e6894dfb479c2 SHA-256: 32cb40e735a8239b473991c4c586682a501b4351cf28ec1fef4fdeca680faddd
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including one identified as a malicious redirector, which leads to a lure for free game items. The heuristic 'PDF_GAME_HACK_REDIRECT_LURE' and 'PDF_MALICIOUS_REDIRECTOR_LINK' strongly indicate a phishing or scam attempt. The document body contains the primary malicious URL, suggesting the intent is to drive traffic to this site for potential malware download or further phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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/free-minecraft-codes-2021-game-hack In PDF document text
    • http://elibrary.fl.unud.ac.id/repository/free-robux-ohne-handynummer-2021_GM431946152.pdfIn PDF document text
    • http://elibrary.fl.unud.ac.id/repository/free-roblox-hack-injector_GM431946152.pdfIn PDF document text
    • http://www.elibrary.fl.unud.ac.id/repository/pumpkin-guts-free-robux_GM431946152.pdfIn PDF document text
    • http://www.elibrary.fl.unud.ac.id/repository/how-to-get-free-robux-website_GM431946152.pdfIn PDF document text
    • http://www.elibrary.fl.unud.ac.id/repository/free-robux-games-that-actually-work-2021_GM431946152.pdfIn PDF document text
    • http://elibrary.fl.unud.ac.id/repository/roblox-robux-generator_GM431946152.pdfIn PDF document text
    • http://elibrary.fl.unud.ac.id/repository/pubg-5-uc-buy_GM1330123889.pdfIn PDF document text
    • http://www.elibrary.fl.unud.ac.id/repository/coin-master-hack-mobile_GM406889139.pdfIn PDF document text
    • http://elibrary.fl.unud.ac.id/repository/get-minecraft-windows-10-free_GM479516143.pdfIn PDF document text
    • http://www.elibrary.fl.unud.ac.id/repository/op-rewards-robux_GM431946152.pdfIn PDF document text
    • http://www.elibrary.fl.unud.ac.id/repository/free-robux-no-verification-2021-android_GM431946152.pdfIn PDF document text
    • http://elibrary.fl.unud.ac.id/repository/coin-master-hack-without-verification-code_GM406889139.pdfIn PDF document text
    • http://elibrary.fl.unud.ac.id/repository/roblox-april-fools-hack_GM431946152.pdfIn PDF document text
    • http://elibrary.fl.unud.ac.id/repository/minecraft-hacked-client_GM479516143.pdfIn PDF document text
    • http://www.elibrary.fl.unud.ac.id/repository/free-robux-safe_GM431946152.pdfIn PDF document text
    • http://www.elibrary.fl.unud.ac.id/repository/how-to-hack-coin-master-pc_GM406889139.pdfIn PDF document text
    • http://elibrary.fl.unud.ac.id/repository/roblox-login-hack_GM431946152.pdfIn PDF document text
    • http://elibrary.fl.unud.ac.id/repository/free-robux-generator-2021-no-survey_GM431946152.pdfIn PDF document text
    • http://elibrary.fl.unud.ac.id/repository/free-robux-hack-no-survey-no-download-2021_GM431946152.pdfIn PDF document text
    • http://elibrary.fl.unud.ac.id/repository/cheat-extension-google-pour-cheat-roblox_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_off00002ecb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2ECB 21440 bytes
SHA-256: 738967d04e32c1d4ebf3c1a704638eddebfab2415a8b7cdd7ca6806585747e7d
font_01_sfnt_off00005da8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5DA8 18572 bytes
SHA-256: 9c9be1c1746e8bffc8c37de8884ca441e0cfd315fd90541012b402e13668ab7c

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