Malicious PDF — malware analysis report

Static analysis result for SHA-256 15c4eb1a01cd5c25…

MALICIOUS

PDF

34.7 KB Created: 2021-07-01 16:46:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 83bb9b671c0eef7e9c04170242bf15ed SHA-1: 3e83051212a1038a299f35f5fb8711699d783c75 SHA-256: 15c4eb1a01cd5c259b7eec3cf44e636c35df1968c374d53a2e1ecbd278030f37
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a lure for game hacks and cheats, directing users to a malicious URL. The ML classifier also flagged this PDF as malicious. The embedded URL is known to be associated with malicious redirector infrastructure, indicating an attempt to deliver a payload or lead the user to a phishing site.

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.co/app/431946152/roblox-cheat-codes-for-phone-game-hack In PDF document text
    • http://www.bcph.moph.go.th/ckfinder/userfiles/files/coin-master-free-spin-app-iphone_GM406889139.pdfIn PDF document text
    • http://www.bcph.moph.go.th/ckfinder/userfiles/files/free-roblox-redeem-codes-that-havent-been-used_GM431946152.pdfIn PDF document text
    • http://www.bcph.moph.go.th/ckfinder/userfiles/files/minecraft-hack-2021_GM479516143.pdfIn PDF document text
    • http://www.bcph.moph.go.th/ckfinder/userfiles/files/free-tiktok-followers-no-downloads_GM835599320.pdfIn PDF document text
    • http://www.bcph.moph.go.th/ckfinder/userfiles/files/free-robux-today-2021_GM431946152.pdfIn PDF document text
    • http://www.bcph.moph.go.th/ckfinder/userfiles/files/roblox-player-speed-hack-script-pastebin_GM431946152.pdfIn PDF document text
    • http://www.bcph.moph.go.th/ckfinder/userfiles/files/are-games-on-roblox-free-to-make_GM431946152.pdfIn PDF document text
    • http://www.bcph.moph.go.th/ckfinder/userfiles/files/how-to-get-minecraft-pe-for-free_GM479516143.pdfIn PDF document text
    • http://www.bcph.moph.go.th/ckfinder/userfiles/files/minecraft-server-hacks_GM479516143.pdfIn PDF document text
    • http://www.bcph.moph.go.th/ckfinder/userfiles/files/is-minecraft-bedrock-edition-free_GM479516143.pdfIn PDF document text
    • http://www.bcph.moph.go.th/ckfinder/userfiles/files/how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.bcph.moph.go.th/ckfinder/userfiles/files/body-roblox_GM431946152.pdfIn PDF document text
    • http://www.bcph.moph.go.th/ckfinder/userfiles/files/roblox-jailbreak-hack-download_GM431946152.pdfIn PDF document text
    • http://www.bcph.moph.go.th/ckfinder/userfiles/files/whost-get-gamepass-free-roblox-2021_GM431946152.pdfIn PDF document text
    • http://www.bcph.moph.go.th/ckfinder/userfiles/files/how-to-get-free-robux-2021-2021_GM431946152.pdfIn PDF document text
    • http://www.bcph.moph.go.th/ckfinder/userfiles/files/minecraft-java-free-download_GM479516143.pdfIn PDF document text
    • http://www.bcph.moph.go.th/ckfinder/userfiles/files/coin-master-free-blogspot_GM406889139.pdfIn PDF document text
    • http://www.bcph.moph.go.th/ckfinder/userfiles/files/chara-undertale-for-roblox-hack_GM431946152.pdfIn PDF document text
    • http://www.bcph.moph.go.th/ckfinder/userfiles/files/free-spins-for-coin-master-app_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000302a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x302A 22372 bytes
SHA-256: 083d9d1d7ca652f42f7a3adc0d253032a33c0168ff6f397c04de58416720a97a
font_01_sfnt_off000061f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61F9 19248 bytes
SHA-256: 65f2171c7f900ba1bdf616c06eee91c9d452c26bd80f75e65d3407d4626717f8

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