Malicious PDF — malware analysis report

Static analysis result for SHA-256 a082c6e0daf7839a…

MALICIOUS

PDF

35.9 KB Created: 2021-07-06 07:53:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 647c36ff59ee987f30872f9380c647b4 SHA-1: 6887438a61df06fa66d361031d3894ee75703c04 SHA-256: a082c6e0daf7839afca09b56c491271f060a747dcae4b6a9e66c8466769ecc50
142 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which are SEO-optimized to appear as game hacks or generators for popular games like Minecraft and Roblox. The primary URL, http://netcdn.tw/app/479516143/minecraft-ps3-free-download-game-hack, is a direct lure for a game hack. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of these links, suggesting a link farm or phishing campaign designed to drive traffic and potentially distribute malware.

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/minecraft-ps3-free-download-game-hack PDF link annotation
    • http://perpus.stikesphi.ac.id/repository/how-to-hack-denis-roblox-acc_GM431946152.pdfIn PDF document text
    • http://perpus.stikesphi.ac.id/repository/how-to-get-any-roblox-hat-for-free_GM431946152.pdfIn PDF document text
    • http://perpus.stikesphi.ac.id/repository/robux-onlineusroblox-hackunl_GM431946152.pdfIn PDF document text
    • http://perpus.stikesphi.ac.id/repository/how-do-i-get-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.stikesphi.ac.id/repository/coin-master-hack-no-verify_GM406889139.pdfIn PDF document text
    • http://perpus.stikesphi.ac.id/repository/free-robux-generator-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://perpus.stikesphi.ac.id/repository/coin-master-free-daily-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://perpus.stikesphi.ac.id/repository/roblox-free-things-list_GM431946152.pdfIn PDF document text
    • http://perpus.stikesphi.ac.id/repository/free-robux-2021-no-verification_GM431946152.pdfIn PDF document text
    • http://perpus.stikesphi.ac.id/repository/coin-master-game-hack_GM406889139.pdfIn PDF document text
    • http://perpus.stikesphi.ac.id/repository/roblox-free-items-2021_GM431946152.pdfIn PDF document text
    • http://perpus.stikesphi.ac.id/repository/free-robux-generatore_GM431946152.pdfIn PDF document text
    • http://perpus.stikesphi.ac.id/repository/coin-master-fan-page-free-spins_GM406889139.pdfIn PDF document text
    • http://perpus.stikesphi.ac.id/repository/how-to-get-free-robux-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://perpus.stikesphi.ac.id/repository/free-roblox-gift-card-codes_GM431946152.pdfIn PDF document text
    • http://perpus.stikesphi.ac.id/repository/how-to-get-free-robux-without-verification_GM431946152.pdfIn PDF document text
    • http://perpus.stikesphi.ac.id/repository/free-roblox-hack-com_GM431946152.pdfIn PDF document text
    • http://perpus.stikesphi.ac.id/repository/get-free-spins-coin-master-link_GM406889139.pdfIn PDF document text
    • http://perpus.stikesphi.ac.id/repository/hack-cheat-engine-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.stikesphi.ac.id/repository/coin-master-hack-apk-april-12-2021_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_off00003464.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3464 23064 bytes
SHA-256: 04a33e5c459ef92d891fb34e082fb9e6a401f035172d262d99cc8fb549ac8b04
font_01_sfnt_off000067c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x67C7 18904 bytes
SHA-256: 1ff22f039942d0da4b5f5b0c58eeeabae74443a41c427605d95e99f5cf2dd39a

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