Malicious PDF — malware analysis report

Static analysis result for SHA-256 d07096fabe7316f9…

MALICIOUS

PDF

45.1 KB Created: 2021-05-15 13:18:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: da92e69881a5f3a8c60cf2e139268b7f SHA-1: 6673d93976f9c5151cd45edeaa7445086407cd04 SHA-256: d07096fabe7316f93598aceb7690e3cb5df91c1b99aa14364322d074a38d7010
142 Risk Score

Malware Insights

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

This PDF document contains a large number of external links, many of which are disguised as game hacks or generators. The primary URL, 'https://netcdn.xyz/app/479516143/minecraft-ps3-free-download-game-hack', suggests a lure for downloading potentially malicious content. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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.
  • PDF links to a 'free generator / game hack' redirector high 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.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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 https://netcdn.xyz/app/479516143/minecraft-ps3-free-download-game-hack PDF link annotation
    • https://jugendfeuerwehr-scheinfeld.de/images/free-spin-coin-master-instagram_GM406889139.pdfIn PDF document text
    • https://jugendfeuerwehr-scheinfeld.de/images/free-robux-no-verification_GM431946152.pdfIn PDF document text
    • https://jugendfeuerwehr-scheinfeld.de/images/coin-master-free-spins-2021-link_GM406889139.pdfIn PDF document text
    • https://jugendfeuerwehr-scheinfeld.de/images/free-modded-minecraft-server-hosting_GM479516143.pdfIn PDF document text
    • https://jugendfeuerwehr-scheinfeld.de/images/legit-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://jugendfeuerwehr-scheinfeld.de/images/free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://jugendfeuerwehr-scheinfeld.de/images/link-for-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://jugendfeuerwehr-scheinfeld.de/images/free-robux-no-verification-2021_GM431946152.pdfIn PDF document text
    • https://jugendfeuerwehr-scheinfeld.de/images/free-games-coin-master_GM406889139.pdfIn PDF document text
    • https://jugendfeuerwehr-scheinfeld.de/images/roblox-executor-free-download_GM431946152.pdfIn PDF document text
    • https://jugendfeuerwehr-scheinfeld.de/images/coinmasterfree_GM406889139.pdfIn PDF document text
    • https://jugendfeuerwehr-scheinfeld.de/images/minecraft-maps-pe-free-download_GM479516143.pdfIn PDF document text
    • https://jugendfeuerwehr-scheinfeld.de/images/how-to-get-free-spins-on-coin-master-2021-ios_GM406889139.pdfIn PDF document text
    • https://jugendfeuerwehr-scheinfeld.de/images/coin-master-hack-version-2021-free-download_GM406889139.pdfIn PDF document text
    • https://jugendfeuerwehr-scheinfeld.de/images/how-to-hack-roblox-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://jugendfeuerwehr-scheinfeld.de/images/rewards-roblox-com_GM431946152.pdfIn PDF document text
    • https://jugendfeuerwehr-scheinfeld.de/images/coin-master-hack-software_GM406889139.pdfIn PDF document text
    • https://jugendfeuerwehr-scheinfeld.de/images/get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • https://jugendfeuerwehr-scheinfeld.de/images/free-bobux_GM431946152.pdfIn PDF document text
    • https://jugendfeuerwehr-scheinfeld.de/images/how-to-get-free-robux-without-human-verification-2021_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
stream_003_off0000497f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x497F 29680 bytes
SHA-256: 2b221dcb45663042fb71921ec4a9be03bc820bf905ba3aebeb4f16e9c0d75fe9
font_01_sfnt_off00008d3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D3D 18620 bytes
SHA-256: 443c579721cb83aa688c87d53d4f821f8ee4cd96576bd26e49b571574689098a

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