Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f352c755f6bc69e…

MALICIOUS

PDF

34.9 KB Created: 2021-06-23 03:25:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 936627925f0e07ee7678364c4cbb3a4c SHA-1: dbb8e2b39859d7f649cb513e7e39e68607747de0 SHA-256: 0f352c755f6bc69e37a1e1170f2a51cb36cf959acf09b5c85fd65a1f3a69d00c
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains multiple links and embedded URLs that are designed to lure users into believing they can obtain free in-game currency or hacks for popular games like Coin Master and Roblox. The heuristic PDF_GAME_HACK_REDIRECT_LURE specifically flags this behavior. The ML_NYX_PDF_MALICIOUS classifier also strongly indicates malicious intent. The document body and extracted URLs point towards a phishing or scamming attempt, likely to lead users to malicious sites that may host further malware or attempt credential theft.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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/406889139/how-can-i-get-free-coinsn-coin-master-game-hack PDF link annotation
    • https://sedotwcsaluranmampet.com/ckfinder/userfiles/files/how-to-buy-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • https://sedotwcsaluranmampet.com/ckfinder/userfiles/files/earn-free-robux-for-roblox_GM431946152.pdfIn PDF document text
    • https://sedotwcsaluranmampet.com/ckfinder/userfiles/files/free-robux-gift-card_GM431946152.pdfIn PDF document text
    • https://sedotwcsaluranmampet.com/ckfinder/userfiles/files/roblox-bc-free-account_GM431946152.pdfIn PDF document text
    • https://sedotwcsaluranmampet.com/ckfinder/userfiles/files/huskybuckscom-free-robux_GM431946152.pdfIn PDF document text
    • https://sedotwcsaluranmampet.com/ckfinder/userfiles/files/free-mod-apk-coin-master_GM406889139.pdfIn PDF document text
    • https://sedotwcsaluranmampet.com/ckfinder/userfiles/files/pubg-uc-zam_GM1330123889.pdfIn PDF document text
    • https://sedotwcsaluranmampet.com/ckfinder/userfiles/files/ben-ten-roblox-game-online-free_GM431946152.pdfIn PDF document text
    • https://sedotwcsaluranmampet.com/ckfinder/userfiles/files/wwwhaktutsin-2021-08-coinmasterfreespinandcoinlinkhtml-m-1_GM406889139.pdfIn PDF document text
    • https://sedotwcsaluranmampet.com/ckfinder/userfiles/files/wurst-mc_GM479516143.pdfIn PDF document text
    • https://sedotwcsaluranmampet.com/ckfinder/userfiles/files/free-coins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://sedotwcsaluranmampet.com/ckfinder/userfiles/files/does-bc-on-roblox-give-a-free-trial_GM431946152.pdfIn PDF document text
    • https://sedotwcsaluranmampet.com/ckfinder/userfiles/files/roblox-hacks-download-mac_GM431946152.pdfIn PDF document text
    • https://sedotwcsaluranmampet.com/ckfinder/userfiles/files/free-roblox-hair-boy_GM431946152.pdfIn PDF document text
    • https://sedotwcsaluranmampet.com/ckfinder/userfiles/files/coin-master-free-spins-no-human-verification_GM406889139.pdfIn PDF document text
    • https://sedotwcsaluranmampet.com/ckfinder/userfiles/files/how-to-get-free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • https://sedotwcsaluranmampet.com/ckfinder/userfiles/files/coin-master-hack-1021_GM406889139.pdfIn PDF document text
    • https://sedotwcsaluranmampet.com/ckfinder/userfiles/files/mcpe-download_GM479516143.pdfIn PDF document text
    • https://sedotwcsaluranmampet.com/ckfinder/userfiles/files/this-server-is-hacked-sound-id-roblox_GM431946152.pdfIn PDF document text
    • https://sedotwcsaluranmampet.com/ckfinder/userfiles/files/coin-master-daily-free-spins-link-facebook_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
stream_002_off0000321a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x321A 23088 bytes
SHA-256: 13a9933217d356f42f73b0bab111b7286e21d7d4ee3fa258280b979e899c185c
font_01_sfnt_off0000661b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x661B 18164 bytes
SHA-256: fa47a7a0c7c4ec8ea8fe3afb2e8d91ccfaa7851461a3b0a3b74041f8effbb9c2

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