Malicious PDF — malware analysis report

Static analysis result for SHA-256 b72356e9244e686d…

MALICIOUS

PDF

34.1 KB Created: 2021-06-27 10:26:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 4ccbad48d294b0ff54ecedcb3643e836 SHA-1: 6ca3adbd5029bfbdba60e4327d66ee8d6bb0b2fc SHA-256: b72356e9244e686da68f907bc7127eec58a8a9ea611fe0e2b7bdd361423931a5
160 Risk Score

Malware Insights

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

The PDF document contains multiple links, including one to a known malicious redirector, that lure users into downloading game hacks or generators. The document body and heuristics indicate a clear intent to trick users into visiting these sites, likely to download a malicious payload. The ML classifier strongly supports the malicious nature of this PDF.

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-download-game-hack In PDF document text
    • https://kierowcyhgv.uk/images/free-roblox-card-codes_GM431946152.pdfIn PDF document text
    • https://kierowcyhgv.uk/images/https-oprewards-com-roblox_GM431946152.pdfIn PDF document text
    • https://kierowcyhgv.uk/images/minecraft-dungeons-free_GM479516143.pdfIn PDF document text
    • https://kierowcyhgv.uk/images/coin-master-free-spins-and-coins-blogspot_GM406889139.pdfIn PDF document text
    • https://kierowcyhgv.uk/images/free-tiktok-fans_GM835599320.pdfIn PDF document text
    • http://kierowcyhgv.uk/images/rbxcashcom-watch-videos-complete-offers-withdraw-to-robux-for-free_GM431946152.pdfIn PDF document text
    • http://kierowcyhgv.uk/images/how-to-use-cheat-engine-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • https://kierowcyhgv.uk/images/free-robux-2021_GM431946152.pdfIn PDF document text
    • http://kierowcyhgv.uk/images/how-to-earn-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://kierowcyhgv.uk/images/free-robux-generator-xyz_GM431946152.pdfIn PDF document text
    • http://kierowcyhgv.uk/images/how-to-hack-elemental-battlegrounds-roblox-cheat-engine_GM431946152.pdfIn PDF document text
    • http://kierowcyhgv.uk/images/free-robux-hack-for-2021_GM431946152.pdfIn PDF document text
    • https://kierowcyhgv.uk/images/minecraft-free-download-mac_GM479516143.pdfIn PDF document text
    • https://kierowcyhgv.uk/images/cheat-codes-for-coin-master_GM406889139.pdfIn PDF document text
    • http://kierowcyhgv.uk/images/hack-roblox-workin-the-fuck_GM431946152.pdfIn PDF document text
    • https://kierowcyhgv.uk/images/how-to-get-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://kierowcyhgv.uk/images/roblox-get-robux-hack_GM431946152.pdfIn PDF document text
    • http://kierowcyhgv.uk/images/cheats-in-vehicle-simulator-roblox_GM431946152.pdfIn PDF document text
    • https://kierowcyhgv.uk/images/minecraft-online-free-no-download_GM479516143.pdfIn PDF document text
    • https://kierowcyhgv.uk/images/free-robux-earn_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_off00002e96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E96 22040 bytes
SHA-256: 0ee9ddc30897e7dbdb62d92a7683031f47aee83e1225da3ba0683ccbfa4ba750
font_01_sfnt_off00005f77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F77 19160 bytes
SHA-256: 20e8ef43e122870d61f5f3bdc7785651657b4c6f8223466300bbb50b4def8f00

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