Malicious PDF — malware analysis report

Static analysis result for SHA-256 776caab1a91923be…

MALICIOUS

PDF

34.1 KB Created: 2021-07-04 10:20:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 2a6be6db40d238ff51a7864fede1a6d0 SHA-1: 184f4d8c7d1fb5ff2fbf095e6c61e31822e70417 SHA-256: 776caab1a91923beef39fe7e1aae29b0ab576347ce96289d3ff8e71b770cd352
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • 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/406889139/coin-master-hack-unlimited-spins-game-hack PDF link annotation
    • https://pasca.unisba.ac.id/elibrary/repository/how-to-get-free-unlimited-robux-2021_GM431946152.pdfIn PDF document text
    • https://pasca.unisba.ac.id/elibrary/repository/how-to-hack-accounts-on-roblox-and-no-logout_GM431946152.pdfIn PDF document text
    • https://pasca.unisba.ac.id/elibrary/repository/how-to-hack-roblox-accounts_GM431946152.pdfIn PDF document text
    • https://pasca.unisba.ac.id/elibrary/repository/coin-master-gold-cards-free_GM406889139.pdfIn PDF document text
    • https://pasca.unisba.ac.id/elibrary/repository/roblox-free-wings-2021_GM431946152.pdfIn PDF document text
    • https://pasca.unisba.ac.id/elibrary/repository/hack-para-roblox-jailbreack-coat-y-muchos-mas_GM431946152.pdfIn PDF document text
    • https://pasca.unisba.ac.id/elibrary/repository/does-roblox-sense-cheat-engine_GM431946152.pdfIn PDF document text
    • https://pasca.unisba.ac.id/elibrary/repository/image-hacker-roblox_GM431946152.pdfIn PDF document text
    • https://pasca.unisba.ac.id/elibrary/repository/roblox-hide-and-seek-extreme-hack_GM431946152.pdfIn PDF document text
    • https://pasca.unisba.ac.id/elibrary/repository/roblox-hack-robux-hack-com_GM431946152.pdfIn PDF document text
    • https://pasca.unisba.ac.id/elibrary/repository/free-minecraft-videos_GM479516143.pdfIn PDF document text
    • https://pasca.unisba.ac.id/elibrary/repository/minecraft-free-online-unblocked_GM479516143.pdfIn PDF document text
    • https://pasca.unisba.ac.id/elibrary/repository/op-rewards-robux_GM431946152.pdfIn PDF document text
    • https://pasca.unisba.ac.id/elibrary/repository/www-roblox-hack-com_GM431946152.pdfIn PDF document text
    • https://pasca.unisba.ac.id/elibrary/repository/como-hackear-gente-en-roblox_GM431946152.pdfIn PDF document text
    • https://pasca.unisba.ac.id/elibrary/repository/hacking-cheats-for-roblox_GM431946152.pdfIn PDF document text
    • https://pasca.unisba.ac.id/elibrary/repository/roblox-shop-free-stuff_GM431946152.pdfIn PDF document text
    • https://pasca.unisba.ac.id/elibrary/repository/free-roblox-items-on-catalog_GM431946152.pdfIn PDF document text
    • https://pasca.unisba.ac.id/elibrary/repository/roblox-robux-hack-no-offers_GM431946152.pdfIn PDF document text
    • https://pasca.unisba.ac.id/elibrary/repository/roblox-free-robux-codes_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
stream_002_off00002e4b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2E4B 22552 bytes
SHA-256: e780dfc660dfbe12373d1a70782121abd1185cf97617ae94e4eeee43fdcc7ed2
font_01_sfnt_off000060ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60AC 18876 bytes
SHA-256: aa28e86df5844d54865a8c0e1e2a45292076dab41c3063256e02fdac274dd555

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