Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d040d5a2d5e056a…

MALICIOUS

PDF

33.1 KB Created: 2021-07-05 22:21:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 0f4bf0d817a1ec1c7a1ade46dcab1983 SHA-1: 6bbe8b4f0d21d6b9d8f6cc937ff24730bc2ba46d SHA-256: 4d040d5a2d5e056aa8317cd80cba6a82678b248b85b1342bb100fc009a596fe1
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs, with a primary URL identified as a malicious redirector. This redirector likely serves to deliver further malicious content or phishing pages, exploiting the user's interest in game-related 'hacks' or free items. The ML classifier strongly indicated maliciousness, supporting the analysis of the embedded links.

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-mojang-account-with-minecraft-game-hack In PDF document text
    • http://pustaka-smpn3tpi.com/repository/free-clothes-from-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/free-roblox-gift-card-codes-2021-unused_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/free-roblox-redeem-pins_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com//repository/free-roblox-accounts-with-robux-2021_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/roblox-report-hacker_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/rb-lx-free-robux_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/facebook-coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/coin-master-cheats-and-hacks_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/coin-master-app_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com//repository/free-robux-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/how-do-u-hack-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/how-to-get-free-robux-for-kids_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/all-coin-master-spin-link-and-free-download_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/free-robux-generator-ios_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/coin-master-hack-progamers_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com//repository/minecraft-survival-hacks_GM479516143.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/master-coin-hack-mod_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/free-robux-that-actually-works_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/coin-master-hack-tool-v1-9-download-free-pc_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com//repository/free-robux-that-actually-works-2021_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002f76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F76 21188 bytes
SHA-256: 3d9949ce24b9fea1540eb0a6756ddcf270c5e3869efdc79fd90739103c733b55
font_01_sfnt_off00005d49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D49 18688 bytes
SHA-256: 60143c81e88e14cdfb7631f3b4f61d617c046054e7601d01d98adb150323207f

Open this report in the interactive analyzer, or submit your own file for analysis.