Malicious PDF — malware analysis report

Static analysis result for SHA-256 da286f72b6dacad9…

MALICIOUS

PDF

34.8 KB Created: 2021-07-03 10:44:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 790b80350bbf53fea318c71910dbfa4e SHA-1: a95ba13b5d6c6455c64a4fa54dffa4d9bcc5995a SHA-256: da286f72b6dacad930bf651d85411f6475f4e003287f77e03a42f6c7880e9eaa
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document is designed to lure users into clicking on links that promise game hacks or generators. The primary link leads to a known malicious redirector infrastructure, and numerous other links point to PDF files hosted on a link farm. The document's content and embedded links strongly suggest a social engineering tactic to drive traffic to potentially malicious sites or download unwanted software.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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.
  • 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.
  • 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.co/app/406889139/legit-coin-master-hack-october-2021-game-hack In PDF document text
    • https://yontemakademi.com.tr/public/uploads/files/free-coin-master-app_GM406889139.pdfIn PDF document text
    • https://yontemakademi.com.tr/public/uploads/files/free-tiktok-likes-2021_GM835599320.pdfIn PDF document text
    • https://yontemakademi.com.tr/public/uploads/files/hack-this-site-roblox_GM431946152.pdfIn PDF document text
    • https://yontemakademi.com.tr/public/uploads/files/coin-master-free-spins-today-daily-links_GM406889139.pdfIn PDF document text
    • https://yontemakademi.com.tr/public/uploads/files/prison-life-roblox-hack-download-20212021_GM431946152.pdfIn PDF document text
    • https://yontemakademi.com.tr/public/uploads/files/april-fools-hack-roblox-wiki_GM431946152.pdfIn PDF document text
    • https://yontemakademi.com.tr/public/uploads/files/coin-master-hack-tool-exe_GM406889139.pdfIn PDF document text
    • https://yontemakademi.com.tr/public/uploads/files/google-how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • https://yontemakademi.com.tr/public/uploads/files/how-to-get-free-money-in-jailbreak-roblox_GM431946152.pdfIn PDF document text
    • https://yontemakademi.com.tr/public/uploads/files/free-coin-master-game_GM406889139.pdfIn PDF document text
    • https://yontemakademi.com.tr/public/uploads/files/coin-master-game-hunters-club_GM406889139.pdfIn PDF document text
    • https://yontemakademi.com.tr/public/uploads/files/how-to-get-free-robux-fast_GM431946152.pdfIn PDF document text
    • https://yontemakademi.com.tr/public/uploads/files/how-to-get-free-robux-on-android_GM431946152.pdfIn PDF document text
    • https://yontemakademi.com.tr/public/uploads/files/i-got-hacked-playing-roblox_GM431946152.pdfIn PDF document text
    • https://yontemakademi.com.tr/public/uploads/files/robux-games_GM431946152.pdfIn PDF document text
    • https://yontemakademi.com.tr/public/uploads/files/moonactive-coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • https://yontemakademi.com.tr/public/uploads/files/free-robux-codes-no-human-verification_GM431946152.pdfIn PDF document text
    • https://yontemakademi.com.tr/public/uploads/files/how-to-get-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • https://yontemakademi.com.tr/public/uploads/files/coin-master-free-spins-2021-link_GM406889139.pdfIn PDF document text
    • https://yontemakademi.com.tr/public/uploads/files/roblox-promo-codes-free-robux_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_off000030db.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x30DB 22912 bytes
SHA-256: 193c415305aa54af318be71bfe1b6318a71d61b2431a0215e3774c1e1ebf55b3
font_01_sfnt_off00006424.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6424 18564 bytes
SHA-256: d2139b6e896fba2bc6825783a40f2adf6174ceefae99483cb33ea8f3a396651d

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