Malicious PDF — malware analysis report

Static analysis result for SHA-256 37144c3ee1bce676…

MALICIOUS

PDF

34.9 KB Created: 2021-06-29 04:16:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 91540ff800dd064cc284698ed222687b SHA-1: 2e21c63ecd3340fcd1b2ba923f2a09d4e6196526 SHA-256: 37144c3ee1bce67616990d77255037175cd4b0ee2d160af199a9ccd1da98a440
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document is designed to lure users into clicking malicious links by promising game hacks and free in-game currency. The embedded URL 'http://netcdn.co/app/431946152/roblox-hack-2021-deutsch-game-hack' is identified as a malicious redirector, likely leading to the download of a second-stage payload. The ML classifier also strongly indicated maliciousness.

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.co/app/431946152/roblox-hack-2021-deutsch-game-hack In PDF document text
    • http://www.elibrary.perludem.org/repository/coin-master-free-cards-hack_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/roblox-points_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/free-run-roblox_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/free-stuff-in-roblox-games_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/how-to-get-free-robux-with-0-robux_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/how-to-be-hacker-on-roblox_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/free-coin-master-spins-hack_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/free-roblox-clothes-codes_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/cheats-for-jailbreak-roblox-2021_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/free-robux-get_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/how-to-get-free-clothes-and-hair-on-roblox_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/how-many-levels-are-in-coin-master_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/claim-free-robux_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/how-to-cheat-in-phantom-forces-roblox_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/ultimate-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/denis-daily-roblox-shirt-free_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/blue-banded-tophat-gives-you-free-robux_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/coin-master-rewards_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/coin-master-game-free-download-for-pc_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/free-roblox-avatar-ideas_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_off0000300d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x300D 22228 bytes
SHA-256: 6d5f10ffaeaf5ab79472ee4d53795a9266f56ef26accb9dd08c4f630f6c436be
font_01_sfnt_off0000617f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x617F 19636 bytes
SHA-256: 72287dad446e9bfd44a3840cf1986ce92d678af1de2374d9cdf648a79fe5b97f

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