Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d8a4fd529aaedad…

MALICIOUS

PDF

35.2 KB Created: 2021-07-09 03:02:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: efa50ed6f8f634ec3b2349824673af2f SHA-1: 6c3f8e324970595fe94b39836f4f04d8ee6498f5 SHA-256: 7d8a4fd529aaedad749b14f163ec3581da2489db10447cb11cba962af0c2cd5d
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are structured as PDF files hosted on domains related to game cheats and free items. The ML classifier strongly indicated maliciousness, and the presence of a link farm heuristic suggests an attempt to distribute malicious content or engage in SEO abuse. The document body and embedded links point towards a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • 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
  • 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/479516143/minecraft-free-play-now-game-hack PDF link annotation
    • http://librarystkippgribl.com/repository/claim-free-robux_GM431946152.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/hacks-for-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/roblox-how-to-get-roblox-credit-for-free_GM431946152.pdfIn PDF document text
    • http://librarystkippgribl.com//repository/free-pet-treats-coin-master_GM406889139.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/get-free-food-in-coin-master_GM406889139.pdfIn PDF document text
    • http://librarystkippgribl.com//repository/robux-com-free_GM431946152.pdfIn PDF document text
    • http://librarystkippgribl.com//repository/free-robux-pastebin_GM431946152.pdfIn PDF document text
    • http://librarystkippgribl.com//repository/how-to-get-a-refund-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/public-enemy-sun-prairie-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/hack-for-trasure-hunt-simulator-roblox_GM431946152.pdfIn PDF document text
    • http://librarystkippgribl.com//repository/how-to-watch-ads-for-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/coin-master-free-spins-hack-apk-download_GM406889139.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/free-printable-roblox-miniature-chocolate_GM431946152.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/free-robux-websites-no-human-verification_GM431946152.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/coin-and-spin-link_GM406889139.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/free-robux-websites-2021_GM431946152.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/tiktok-free-view-kreatif-lucu_GM835599320.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/link-for-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://librarystkippgribl.com//repository/how-to-get-free-robux-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/coin-master-free-spin-facebook-link_GM406889139.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_off0000340c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x340C 22712 bytes
SHA-256: b8e638f1d8033735498c67797886e88be06ec0325660716d24aec9fe2dfaaf46
font_01_sfnt_off0000663e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x663E 18568 bytes
SHA-256: 3e0abc5b15d88dae619c763eae79776feda0b9ec47dc34c89399b14846fbc152

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