Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e65b304eab4af29…

MALICIOUS

PDF

42.3 KB Created: 2021-05-14 05:12:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 066d6880bfe6b0718e086d1a5475d879 SHA-1: 68204c53d529c7aa6c3ba3c761465299714361f2 SHA-256: 1e65b304eab4af2962e768a89248cb9c6612ddd4fc5a30dcce9630d5ed3d13f3
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to known malicious redirectors, specifically advertising 'free generators' and 'game hacks' for popular mobile games. The primary URL identified, https://netcdn.xyz/app/406889139/coin-master-spin-link-today-2021-game-hack, is flagged as a malicious redirector. The document body, though partially corrupted, contains similar lures and URLs, reinforcing the malicious intent. The presence of multiple PDF-specific heuristics related to malicious redirects and lures indicates a high likelihood of this document being used for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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.xyz/app/406889139/coin-master-spin-link-today-2021-game-hack In PDF document text
    • https://redaksi9.com/new/public/ckfinder/userfiles/files/roblox-mobile-hack_GM431946152.pdfIn PDF document text
    • https://redaksi9.com/new/public/ckfinder/userfiles/files/hack-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://redaksi9.com/new/public/ckfinder/userfiles/files/free-coins-and-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://redaksi9.com/new/public/ckfinder/userfiles/files/coin-master-cards_GM406889139.pdfIn PDF document text
    • https://redaksi9.com/new/public/ckfinder/userfiles/files/free-premium-roblox_GM431946152.pdfIn PDF document text
    • https://redaksi9.com/new/public/ckfinder/userfiles/files/coin-master-free-spin-generator-without-human-verification_GM406889139.pdfIn PDF document text
    • https://redaksi9.com/new/public/ckfinder/userfiles/files/coin-master-daily-free-spin-and-coin_GM406889139.pdfIn PDF document text
    • https://redaksi9.com/new/public/ckfinder/userfiles/files/coin-master-free-coins-link-2021-deutsch_GM406889139.pdfIn PDF document text
    • https://redaksi9.com/new/public/ckfinder/userfiles/files/how-to-get-free-roblox-gift-cards_GM431946152.pdfIn PDF document text
    • https://redaksi9.com/new/public/ckfinder/userfiles/files/how-to-get-free-spins-on-coin-master-without-waiting_GM406889139.pdfIn PDF document text
    • https://redaksi9.com/new/public/ckfinder/userfiles/files/coin-master-spin-link-hack_GM406889139.pdfIn PDF document text
    • https://redaksi9.com/new/public/ckfinder/userfiles/files/coin-master-free-foxy-food_GM406889139.pdfIn PDF document text
    • https://redaksi9.com/new/public/ckfinder/userfiles/files/coin-master-cheats-for-free-spins_GM406889139.pdfIn PDF document text
    • https://redaksi9.com/new/public/ckfinder/userfiles/files/coin-master-free-coins-and-spins_GM406889139.pdfIn PDF document text
    • https://redaksi9.com/new/public/ckfinder/userfiles/files/how-to-get-free-spins-and-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://redaksi9.com/new/public/ckfinder/userfiles/files/free-robux-picture_GM431946152.pdfIn PDF document text
    • https://redaksi9.com/new/public/ckfinder/userfiles/files/rbxoffer-com-free-robux_GM431946152.pdfIn PDF document text
    • https://redaksi9.com/new/public/ckfinder/userfiles/files/roblox-rape-hack_GM431946152.pdfIn PDF document text
    • https://redaksi9.com/new/public/ckfinder/userfiles/files/coin-master-free-coins-and-spins-app_GM406889139.pdfIn PDF document text
    • https://redaksi9.com/new/public/ckfinder/userfiles/files/how-to-hack-roblox-accounts_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_003_off00004bbb.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4BBB 23800 bytes
SHA-256: 3a530f970cc435cd489aa65c97e44d38958d0d81684449866df17d2d433e57b7
font_01_sfnt_off000081bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x81BD 18648 bytes
SHA-256: 85a64f08e45ce4d12cb3dea07aac547d867e231e390d244bf8ece1ec3ac8270e

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