Malicious PDF — malware analysis report

Static analysis result for SHA-256 d738599f36e25007…

MALICIOUS

PDF

41.7 KB Created: 2021-05-17 02:21:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 3074040846b2c14856c6e5fc56318d00 SHA-1: 08add9d035b2cccc8f33e346eb856a38435edbfd SHA-256: d738599f36e250073eac0d4c54dbb80bcce9bc951b3b5c36d6bb9aa7ab6df88a
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links designed to lure users into clicking on what appears to be a "game hack" or "free spins" generator. These links redirect to malicious infrastructure, specifically a known malicious redirector. The document body and embedded URLs reinforce this lure, aiming to trick users into visiting potentially harmful sites. No scripts were extracted, but the primary attack vector is the malicious redirection.

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-free-spins-2021-no-human-verification-game-hack In PDF document text
    • http://www.bdlh.go.th/ckfinder/userfiles/files/descargar-coin-master-hackeado_GM406889139.pdfIn PDF document text
    • http://www.bdlh.go.th/ckfinder/userfiles/files/bux-free-robux_GM431946152.pdfIn PDF document text
    • http://www.bdlh.go.th/ckfinder/userfiles/files/free-coins-coin-master-link_GM406889139.pdfIn PDF document text
    • http://www.bdlh.go.th/ckfinder/userfiles/files/hacked-client-for-minecraft-bedrock_GM479516143.pdfIn PDF document text
    • http://www.bdlh.go.th/ckfinder/userfiles/files/robux-hack-generator_GM431946152.pdfIn PDF document text
    • http://www.bdlh.go.th/ckfinder/userfiles/files/how-to-get-100-robux-for-free_GM431946152.pdfIn PDF document text
    • http://www.bdlh.go.th/ckfinder/userfiles/files/how-to-hack-roblox-2021_GM431946152.pdfIn PDF document text
    • http://www.bdlh.go.th/ckfinder/userfiles/files/hack-coin-master-game-download_GM406889139.pdfIn PDF document text
    • http://www.bdlh.go.th/ckfinder/userfiles/files/free-coin-and-spin-in-coin-master_GM406889139.pdfIn PDF document text
    • http://www.bdlh.go.th/ckfinder/userfiles/files/how-to-get-hacks-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.bdlh.go.th/ckfinder/userfiles/files/how-to-hack-coin-master-spin-ios_GM406889139.pdfIn PDF document text
    • http://www.bdlh.go.th/ckfinder/userfiles/files/free-robux-generator-without-human-verification_GM431946152.pdfIn PDF document text
    • http://www.bdlh.go.th/ckfinder/userfiles/files/coin-master-fan-page-giveaway_GM406889139.pdfIn PDF document text
    • http://www.bdlh.go.th/ckfinder/userfiles/files/download-minecraft-free-hiapphere_GM479516143.pdfIn PDF document text
    • http://www.bdlh.go.th/ckfinder/userfiles/files/robux-hack_GM431946152.pdfIn PDF document text
    • http://www.bdlh.go.th/ckfinder/userfiles/files/get-free-cards-coin-master_GM406889139.pdfIn PDF document text
    • http://www.bdlh.go.th/ckfinder/userfiles/files/how-to-get-free-roblox-premium_GM431946152.pdfIn PDF document text
    • http://www.bdlh.go.th/ckfinder/userfiles/files/free-robux-ad_GM431946152.pdfIn PDF document text
    • http://www.bdlh.go.th/ckfinder/userfiles/files/hack-coin-master-2021-pc_GM406889139.pdfIn PDF document text
    • http://www.bdlh.go.th/ckfinder/userfiles/files/minecraft-free-games-no-download_GM479516143.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_off000047cd.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x47CD 23948 bytes
SHA-256: ca86a3e9d38d3e06795cf0c02e8ef9cc46016fc119ef675c69938baa54d01fb3
font_01_sfnt_off00007ecd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7ECD 18820 bytes
SHA-256: 2c71750b10e3f4f91d0cb62777e145d12ef59acd231b22b6c7decf769d1f55c7

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