Malicious PDF — malware analysis report

Static analysis result for SHA-256 2364a9ada1882be1…

MALICIOUS

PDF

34.3 KB Created: 2021-07-05 18:03:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 3591f4421e7d9e12380d3822b6950dcd SHA-1: f3d0cd6c7dd902de87fce1aae761515bd3e8e706 SHA-256: 2364a9ada1882be131bd22beca189764df3db3a49b304b4a2803a62102571d09
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to a known malicious redirector infrastructure, specifically advertising free Robux and game hacks. The ML classifier also strongly indicated maliciousness. The primary lure appears to be a fake generator or hack, directing users to the malicious URL http://netcdn.tw/app/431946152/bux-life-free-robux-game-hack, which is likely intended to deliver a secondary payload or lead to a phishing site.

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/431946152/bux-life-free-robux-game-hack In PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/working-redeem-roblox-cards-free-codes-2021_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/coin-master-free-soins_GM406889139.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/roblox-contrasea-hack_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/hexus-roblox-free_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/roblox-hack-teleport-and-wool-and-speed-and-money_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/minecraft-hacks-list_GM479516143.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/cheat-for-dinosour-simulator-on-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/oprewards-points-generator_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/free-robux-by-watching-ads_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/how-to-make-vip-server-for-free-in-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/how-to-hack-players-accounts-on-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/coin-master-hack-software-download_GM406889139.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/roblox-com-r_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/free-robux-and-robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/roblox-robux-hack-no-survey-no-human-verification_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/how-to-get-free-faces-on-roblox-2021-on-computer_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/roblox-games-with-free-music_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/my-roblox-account-was-hacked_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/free-bird-guitar-solo-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/coin-master-free-spins-link-whatsapp-group_GM406889139.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_off00002f9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F9F 22380 bytes
SHA-256: c7c91d054d2f13ff86f7ca8dba77d580f7a4ea22860d7f72ec6ddeffdb4cef42
font_01_sfnt_off000061a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61A6 18836 bytes
SHA-256: 7f12d751da4e96ccad4d997d7560df235183c1e20666712b69b1e712c003bbe9

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