Malicious PDF — malware analysis report

Static analysis result for SHA-256 7babcc388ecbcb7f…

MALICIOUS

PDF

36.2 KB Created: 2021-07-05 23:55:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 73c2259a35a9654ddc2025bc2d147391 SHA-1: 992b76127007a8090557e558e7afe6d73f89de2e SHA-256: 7babcc388ecbcb7f4c7692e114f444221e9e963928b42bd845e89b537f3db857
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded links that redirect to malicious infrastructure, masquerading as free game currency generators. The primary lure URL is http://netcdn.tw/app/406889139/free-spin-coin-master-2021-link-game-hack. This indicates a phishing or scam attempt designed to trick users into visiting potentially harmful sites. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/406889139/free-spin-coin-master-2021-link-game-hack In PDF document text
    • https://redaksi9.com/new/public/ckfinder/userfiles/files/hey-google-how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • https://redaksi9.com/new/public/ckfinder/userfiles/files/how-to-get-real-robux_GM431946152.pdfIn PDF document text
    • https://redaksi9.com/new/public/ckfinder/userfiles/files/coin-master-free-spins-and-coins-app-download_GM406889139.pdfIn PDF document text
    • https://redaksi9.com/new/public/ckfinder/userfiles/files/how-to-cheat-robux-2021_GM431946152.pdfIn PDF document text
    • https://redaksi9.com/new/public/ckfinder/userfiles/files/pokemon-go-free-pokeballs-code_GM1094591345.pdfIn PDF document text
    • https://redaksi9.com/new/public/ckfinder/userfiles/files/roblox-verification_GM431946152.pdfIn PDF document text
    • https://redaksi9.com/new/public/ckfinder/userfiles/files/how-to-get-free-roblox-hair_GM431946152.pdfIn PDF document text
    • https://redaksi9.com/new/public/ckfinder/userfiles/files/roblox-hack-codes_GM431946152.pdfIn PDF document text
    • https://redaksi9.com/new/public/ckfinder/userfiles/files/coin-master-play-online-free_GM406889139.pdfIn PDF document text
    • https://redaksi9.com/new/public/ckfinder/userfiles/files/free-robux-gift-card-generator_GM431946152.pdfIn PDF document text
    • https://redaksi9.com/new/public/ckfinder/userfiles/files/followers-bot-free-roblox_GM431946152.pdfIn PDF document text
    • https://redaksi9.com/new/public/ckfinder/userfiles/files/free-sprite-shir-roblox_GM431946152.pdfIn PDF document text
    • https://redaksi9.com/new/public/ckfinder/userfiles/files/how-to-get-free-robux-without-downloading-apps-2021_GM431946152.pdfIn PDF document text
    • https://redaksi9.com/new/public/ckfinder/userfiles/files/easy-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://redaksi9.com/new/public/ckfinder/userfiles/files/mcpe-download_GM479516143.pdfIn PDF document text
    • https://redaksi9.com/new/public/ckfinder/userfiles/files/roblox-help-free-robux_GM431946152.pdfIn PDF document text
    • https://redaksi9.com/new/public/ckfinder/userfiles/files/hack-coin-master-ios_GM406889139.pdfIn PDF document text
    • https://redaksi9.com/new/public/ckfinder/userfiles/files/roblox-sexually-abused_GM431946152.pdfIn PDF document text
    • https://redaksi9.com/new/public/ckfinder/userfiles/files/how-to-hack-roblox-accounts-2021_GM431946152.pdfIn PDF document text
    • https://redaksi9.com/new/public/ckfinder/userfiles/files/how-to-hack-someones-account-in-roblox-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_002_off000034af.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x34AF 23352 bytes
SHA-256: 53435759808fa6613db53913cf10f992e83658f9c937f29e1df530ed6454038b
font_01_sfnt_off0000699d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x699D 18748 bytes
SHA-256: 87551c50e6d609f3c8aae9c53aca7d1ad4c281dc834da60ceb94801aa8be48ba

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