Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ef1f4d3feab7737…

MALICIOUS

PDF

35.1 KB Created: 2021-07-05 01:45:53 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 52c01f249694bb559072eb0b791b79f6 SHA-1: 806ec6c6b5fcecae1c4290e8126de2c991c14646 SHA-256: 1ef1f4d3feab7737a00144abd2643819924cc37cc6b771a321a6fdda7ac788d3
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external sites, many of which are SEO-optimized PDFs designed to appear as game hacks or generators. The primary lure, 'Will Minecraft Dungeons Be Free', directs to a suspicious URL, indicating a likely attempt to redirect users to malicious content or phishing pages. The extensive link farm suggests a tactic to increase visibility and traffic for potentially harmful content.

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/479516143/will-minecraft-dungeons-be-free-game-hack PDF link annotation
    • http://library.forda-mof.org/katalog/repository/roblox-field-of-battle-gem-hack_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/roblox-zone-free-robux_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/robux-gainer_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/how-to-get-free-tiktok-followers_GM835599320.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/how-to-get-free-robux-on-mobile_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/free-robux-no-buying-things_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/how-to-get-free-robux-in-iphone-6_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/free-gift-card-pw-roblox_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/free-robux-just-click_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/hack-codes-robux_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/free-robux-no-human-verification-generator_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/roblox-studio-free-robux_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/roblox-robux-hack-2021-pc_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/robux-money-hack_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/coin-master-free-spins-daily-link-updated_GM406889139.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/https-wwwrobloxcom-games-2021202196-freeubersummerrewards-go-play-now_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/roblox-com-hack_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/can-u-get-free-robux_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/free-coins-and-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/how-to-get-minecraft-for-free-on-nintendo-switch_GM479516143.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_off00003321.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3321 22420 bytes
SHA-256: 36b1e65a1c6575861ba4e09fb8247f9efd167e2c68527b71e929281ce8f490f0
font_01_sfnt_off0000650a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x650A 18796 bytes
SHA-256: a3e2eca43bdc685dc91cfde71aa7da7e93eda67de1cffc55b2ecd2ffb91a605f

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