Malicious PDF — malware analysis report

Static analysis result for SHA-256 b60132d58f6f3d25…

MALICIOUS

PDF

35.4 KB Created: 2021-06-21 02:36:04 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: ac8b401c77b80bfaf42f598b4b4020d5 SHA-1: e3bb3d747336783ac19b9dbcdcefc82fedb2e0fe SHA-256: b60132d58f6f3d25b0c4505461e4847ae918937e7c2d03a68773eafcf73aa8ca
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

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 http://netcdn.co/app/431946152/transparent-pants-roblox-free-game-hack PDF link annotation
    • https://www.mentalhealthnow.co.uk/uploads/files/files/minecraft-free_GM479516143.pdfIn PDF document text
    • https://www.mentalhealthnow.co.uk/uploads/files/files/how-to-get-free-robux-without-verifying-2021_GM431946152.pdfIn PDF document text
    • https://www.mentalhealthnow.co.uk/uploads/files/files/how-to-get-free-gear-in-roblox-2021_GM431946152.pdfIn PDF document text
    • https://www.mentalhealthnow.co.uk/uploads/files/files/coin-master-hack-online-generator-without-human-verification_GM406889139.pdfIn PDF document text
    • https://www.mentalhealthnow.co.uk/uploads/files/files/free-group-roblox_GM431946152.pdfIn PDF document text
    • https://www.mentalhealthnow.co.uk/uploads/files/files/robux-com-free-robux_GM431946152.pdfIn PDF document text
    • https://www.mentalhealthnow.co.uk/uploads/files/files/coin-master-spin-hack-app_GM406889139.pdfIn PDF document text
    • https://www.mentalhealthnow.co.uk/uploads/files/files/how-to-get-free-robux-without-any-verification_GM431946152.pdfIn PDF document text
    • https://www.mentalhealthnow.co.uk/uploads/files/files/cheat-roblox-jailbreak-speed-2021_GM431946152.pdfIn PDF document text
    • https://www.mentalhealthnow.co.uk/uploads/files/files/coin-master-free-coins-and-spins-link_GM406889139.pdfIn PDF document text
    • https://www.mentalhealthnow.co.uk/uploads/files/files/roblox-ninja-dojo-tycoon-cheats_GM431946152.pdfIn PDF document text
    • https://www.mentalhealthnow.co.uk/uploads/files/files/roblox-free-bag_GM431946152.pdfIn PDF document text
    • https://www.mentalhealthnow.co.uk/uploads/files/files/tiradas-coin-master_GM406889139.pdfIn PDF document text
    • https://www.mentalhealthnow.co.uk/uploads/files/files/how-to-hack-minecraft-pe_GM479516143.pdfIn PDF document text
    • https://www.mentalhealthnow.co.uk/uploads/files/files/free-robux-scams-malware-wikia_GM431946152.pdfIn PDF document text
    • https://www.mentalhealthnow.co.uk/uploads/files/files/coin-master-hack-without-human-verification-2021_GM406889139.pdfIn PDF document text
    • https://www.mentalhealthnow.co.uk/uploads/files/files/coin-master-free-spins-link-no-verification-2021_GM406889139.pdfIn PDF document text
    • https://www.mentalhealthnow.co.uk/uploads/files/files/phantom-forces-roblox-hack_GM431946152.pdfIn PDF document text
    • https://www.mentalhealthnow.co.uk/uploads/files/files/best-roblox-exploits-for-free_GM431946152.pdfIn PDF document text
    • https://www.mentalhealthnow.co.uk/uploads/files/files/how-to-get-free-robux-youtube_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_off00003239.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3239 22748 bytes
SHA-256: 1bed2d808b999d27d3dc27c6942b2ab6fc84dc38000efd46d48a8856813b7921
font_01_sfnt_off00006515.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6515 19084 bytes
SHA-256: f5e160fa41eaeb191fdb0aee4313491ff0889778efd45b84da185ee2d0bb1e45