Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b13a185a27ec369…

MALICIOUS

PDF

35.1 KB Created: 2021-07-08 23:21:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 69b40499785245f4918f45474fc75627 SHA-1: 80a1bbc6d4a3a7b60bc29fb0245458e4ed5a309d SHA-256: 7b13a185a27ec369a79b15dc1d7a0e96b642703bfdca62a771c9dba58f58289b
142 Risk Score

Malware Insights

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

This PDF document is designed as a lure, employing 'game hack' and 'free generator' themes to entice users to click on external links. The primary link directs to a URL associated with game hacks, while the document also contains a large number of links to other SEO-optimized PDFs hosted on a separate domain, suggesting a link farm or content network for distributing similar lures. The ML classifier 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 http://netcdn.tw/app/431946152/robux-free-co-game-hack PDF link annotation
    • https://www.mpos-organs.com/uploads/files/files/roblox-how-to-get-unbanned-with-hack_GM431946152.pdfIn PDF document text
    • https://www.mpos-organs.com/uploads/files/files/free-mods-for-coin-master_GM406889139.pdfIn PDF document text
    • https://www.mpos-organs.com/uploads/files/files/games-in-roblox-with-free-radio_GM431946152.pdfIn PDF document text
    • https://www.mpos-organs.com/uploads/files/files/coin-master-mod-version-free-download-2021_GM406889139.pdfIn PDF document text
    • https://www.mpos-organs.com/uploads/files/files/coin-master-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • https://www.mpos-organs.com/uploads/files/files/did-roblox-remove-the-opportunity-to-sell-models-for-free_GM431946152.pdfIn PDF document text
    • https://www.mpos-organs.com/uploads/files/files/bypass-roblox-cheat-engine_GM431946152.pdfIn PDF document text
    • https://www.mpos-organs.com/uploads/files/files/coin-master-hack-xyz-download-free_GM406889139.pdfIn PDF document text
    • https://www.mpos-organs.com/uploads/files/files/how-to-setup-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • https://www.mpos-organs.com/uploads/files/files/ahmed-roblox-hack_GM431946152.pdfIn PDF document text
    • https://www.mpos-organs.com/uploads/files/files/coin-master-unlimited-spin-hack-apk_GM406889139.pdfIn PDF document text
    • https://www.mpos-organs.com/uploads/files/files/coin-master-hack-ios-reddit_GM406889139.pdfIn PDF document text
    • https://www.mpos-organs.com/uploads/files/files/coin-master-hack-version-2021-free-download_GM406889139.pdfIn PDF document text
    • https://www.mpos-organs.com/uploads/files/files/update-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://www.mpos-organs.com/uploads/files/files/how-to-get-minecraft-for-free-2021_GM479516143.pdfIn PDF document text
    • https://www.mpos-organs.com/uploads/files/files/roblox-free-giveaway-obby_GM431946152.pdfIn PDF document text
    • https://www.mpos-organs.com/uploads/files/files/minecraft-diamond-finder-hack_GM479516143.pdfIn PDF document text
    • https://www.mpos-organs.com/uploads/files/files/free-robux-hack-cheat-engine_GM431946152.pdfIn PDF document text
    • https://www.mpos-organs.com/uploads/files/files/coin-master-hack-apk_GM406889139.pdfIn PDF document text
    • https://www.mpos-organs.com/uploads/files/files/free-roblox-song-id_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_off00003444.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3444 22076 bytes
SHA-256: d2f61346799e2b4fdde2246ef8e5083a864de7cd3250421b88bc0cb1e5ba06bf
font_01_sfnt_off0000654b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x654B 18716 bytes
SHA-256: 776cb4e5338264d595c967a8fec9379201c9a4b17293b3c44edd5cf6cd499e31