Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f03ab741b2fb412…

MALICIOUS

PDF

45.5 KB Created: 2021-06-10 16:44:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 7733188d93d006e4f15e81ce39021b81 SHA-1: 1c62376d11b1b66042e16784dbfcf73ffa0928c1 SHA-256: 8f03ab741b2fb41232b2ef820d6e2943150d2497148446bbe423440195f4969c
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 presented as 'game hacks' or 'free generators'. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of such links, suggesting a tactic to drive traffic to potentially malicious or ad-filled pages. The presence of a download button lure further supports the idea that the document is designed to trick users into downloading or visiting harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

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 https://netcdn.tw/app/431946152/roblox-one-piece-pirates-wrath-hack-game-hack PDF link annotation
    • https://ourlady-elearning.com/userfiles/files/minecraft-alt-accounts-free_GM479516143.pdfIn PDF document text
    • https://ourlady-elearning.com/userfiles/files/coin-master-hack-online-link_GM406889139.pdfIn PDF document text
    • https://ourlady-elearning.com/userfiles/files/coin-master-hack-blogspot_GM406889139.pdfIn PDF document text
    • https://ourlady-elearning.com/userfiles/files/coin-master-unlimited-spin-link_GM406889139.pdfIn PDF document text
    • https://ourlady-elearning.com/userfiles/files/how-do-you-hack-roblox_GM431946152.pdfIn PDF document text
    • https://ourlady-elearning.com/userfiles/files/how-to-get-free-robux-website_GM431946152.pdfIn PDF document text
    • https://ourlady-elearning.com/userfiles/files/free-robux-mod_GM431946152.pdfIn PDF document text
    • https://ourlady-elearning.com/userfiles/files/free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://ourlady-elearning.com/userfiles/files/coin-master-daily-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • https://ourlady-elearning.com/userfiles/files/free-robux-games_GM431946152.pdfIn PDF document text
    • https://ourlady-elearning.com/userfiles/files/facebook-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://ourlady-elearning.com/userfiles/files/how-to-get-free-robux-not-a-scam_GM431946152.pdfIn PDF document text
    • https://ourlady-elearning.com/userfiles/files/roblox-hack-ninja-simulator-hacked_GM431946152.pdfIn PDF document text
    • https://ourlady-elearning.com/userfiles/files/hilton-hotels-lua-hack-roblox_GM431946152.pdfIn PDF document text
    • https://ourlady-elearning.com/userfiles/files/minecraft-pocket-edition-free-download_GM479516143.pdfIn PDF document text
    • https://ourlady-elearning.com/userfiles/files/coin-master-free-spin-and-coins-links-2021_GM406889139.pdfIn PDF document text
    • https://ourlady-elearning.com/userfiles/files/roblox-www-com_GM431946152.pdfIn PDF document text
    • https://ourlady-elearning.com/userfiles/files/coin-master-free-spin-now_GM406889139.pdfIn PDF document text
    • https://ourlady-elearning.com/userfiles/files/coin-master-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
    • https://ourlady-elearning.com/userfiles/files/free-robux-easy_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_004_off000051a9.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x51A9 25920 bytes
SHA-256: a0fc7c0774b10d4b32dd6e4aa1d9e203163a3119149e44a93941e2077084dcee
font_01_sfnt_off00008d4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D4D 18924 bytes
SHA-256: a87b347f38bf9a5988a595c5223b39ba2b04e39c4badd135ea7c09c6f6beb72a

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