Malicious PDF — malware analysis report

Static analysis result for SHA-256 d324db9c037a07dd…

MALICIOUS

PDF

35.0 KB Created: 2021-06-19 04:31:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 837c3ccc03c9b39dc17eeeb6e5bbbe9e SHA-1: f8a808768264d23ec5f3184b9edbf1238cdcd92f SHA-256: d324db9c037a07dd2a741e6d3a7a191b7a98198a54a3b705f2cacc457c9c49eb
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains numerous links to external websites, many of which are disguised as free game hacks or currency generators for popular games like Roblox and Coin Master. The heuristic findings indicate a 'PDF SEO Link Farm' and a 'Game Hack Redirect Lure', suggesting the primary purpose is to drive traffic to potentially malicious sites. Although no scripts were extracted, the embedded URLs and the lure content strongly suggest a phishing or malware distribution attempt.

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/asshurt-roblox-free-download-game-hack PDF link annotation
    • http://lib.stie-aub.ac.id/repository/free-robux-no-human-verify_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/easy-robux-today_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/hack-para-roman-aegyptus-roblox_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/minecraft-hacks-ps4_GM479516143.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/roblox-c9m_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/haktuts-coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/haktuts-coin-master-free-spin-today_GM406889139.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/how-to-get-free-spins-on-coin-master-2021-links_GM406889139.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/cool-free-roblox-outfits_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/roblox-hacked-bloxy_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/free-gift-cards-cods-for-roblox_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/the-final-stand-2-roblox-cheat_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/free-roblox-codes-no-human-verification_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/free-robux-no-verification-no-download-2021_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/how-do-you-install-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/get-free-clothing-in-roblox_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/iso-cheat-roblox_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/25-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/coin-master-hack-app-for-ios_GM406889139.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/coin-master-hack-cheat-engine_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_off00002ff3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FF3 22516 bytes
SHA-256: 84281f7aec216c0bd03eb1c2b66da3d5889c187d5e13b33c9baaeba07e5071f4
font_01_sfnt_off0000623c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x623C 19568 bytes
SHA-256: 3153e229cbbfadaf54acdb0cda0c88db54b65f1b65df8816db9d34e97deaae1d

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