Malicious PDF — malware analysis report

Static analysis result for SHA-256 a6313127ee840aaf…

MALICIOUS

PDF

34.7 KB Created: 2021-06-19 22:07:57 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: f20122095c98df853e419925d0451406 SHA-1: c7c44209559b8e4b68b4873624787135b9a784aa SHA-256: a6313127ee840aaf34116e7e2ed8c0955ea4d7088bf25a98a0229d9cbbc10ccb
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, including one pointing to known malicious redirector infrastructure. The document body and heuristics indicate a lure for game hacks and free accounts, designed to trick users into visiting these malicious links. No scripts were extracted, but the embedded links and redirector behavior are strong indicators of a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/murder-island-hack-roblox-game-hack In PDF document text
    • http://lib.fekon.untad.ac.id/repository/free-roblox-accounts-dantdm_GM431946152.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/how-to-get-free-robux-flamingo_GM431946152.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/free-robux-kid-friendly-no-human-verification_GM431946152.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/coin-master-claim-free-spins_GM406889139.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/pokemon-go-free-bot_GM1094591345.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/youtube-roblox-jailbreak-hack-keycard_GM431946152.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/free-robux-real-2021_GM431946152.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/can-you-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/websites-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/roblox-jailbreak-speed-hack_GM431946152.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/robux-com-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/hack-meme-roblox_GM431946152.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/free-spins-for-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/free-spins-from-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/minecraft-free-download-pc_GM479516143.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/how-to-get-free-clothes-on-roblox_GM431946152.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/coin-master-hacks-for-android_GM406889139.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/free-roblox-robux-generator-no-survey-no-download_GM431946152.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/best-roblox-games-to-hack-on_GM431946152.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/how-to-get-unlimited-robux-with-cheat-engine_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_off00003057.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3057 22332 bytes
SHA-256: 3d1aec3d716aeb6db994381ae228903cfafad0afe8b1b055fa981309f5a13fb4
font_01_sfnt_off00006206.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6206 19164 bytes
SHA-256: de4bd99bd60f5bd72637cb63b66631ad458ef79a606b49626904e43139f08285

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