Malicious PDF — malware analysis report

Static analysis result for SHA-256 937cfe55c6826b65…

MALICIOUS

PDF

32.8 KB Created: 2021-06-19 13:59:20 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 6b7ca578413bca7a9ee07669351e2d25 SHA-1: 30dd558e8464084ee364140b6646f2ad2d73d8cc SHA-256: 937cfe55c6826b6596209b83bab0553a84e6fce7827cf1598ee4460bd2345621
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including one to a known malicious redirector at http://netcdn.co/app/431946152/bad-business-cheats-roblox-game-hack. The document body text and embedded links suggest a lure for game cheats or free in-game currency, which is a common social engineering tactic. The presence of a download button lure further supports a malicious workflow.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9824

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/bad-business-cheats-roblox-game-hack In PDF document text
    • http://pet.nfe.go.th/petnfe/userfiles/files/spin-coin-master-free_GM406889139.pdfIn PDF document text
    • http://pet.nfe.go.th/petnfe/userfiles/files/free-roblox-stuff-website_GM431946152.pdfIn PDF document text
    • http://pet.nfe.go.th/petnfe/userfiles/files/is-minecraft-free-on-xbox_GM479516143.pdfIn PDF document text
    • http://pet.nfe.go.th/petnfe/userfiles/files/roblox-battle-royale-hack-script_GM431946152.pdfIn PDF document text
    • http://pet.nfe.go.th/petnfe/userfiles/files/roblox-online-free-no-download_GM431946152.pdfIn PDF document text
    • http://pet.nfe.go.th/petnfe/userfiles/files/free-robux-real_GM431946152.pdfIn PDF document text
    • http://pet.nfe.go.th/petnfe/userfiles/files/minecraft-pe-hacks_GM479516143.pdfIn PDF document text
    • http://pet.nfe.go.th/petnfe/userfiles/files/free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://pet.nfe.go.th/petnfe/userfiles/files/hack-coin-master-download-ios_GM406889139.pdfIn PDF document text
    • http://pet.nfe.go.th/petnfe/userfiles/files/coin-master-hack-apk-ios_GM406889139.pdfIn PDF document text
    • http://pet.nfe.go.th/petnfe/userfiles/files/wurst-commands_GM479516143.pdfIn PDF document text
    • http://pet.nfe.go.th/petnfe/userfiles/files/roblox-tower-defense-simulator-hack_GM431946152.pdfIn PDF document text
    • http://pet.nfe.go.th/petnfe/userfiles/files/get-free-coin-master-coins_GM406889139.pdfIn PDF document text
    • http://pet.nfe.go.th/petnfe/userfiles/files/what-is-a-minecraft-client_GM479516143.pdfIn PDF document text
    • http://pet.nfe.go.th/petnfe/userfiles/files/coin-master-free-spins-hack_GM406889139.pdfIn PDF document text
    • http://pet.nfe.go.th/petnfe/userfiles/files/roblox-promo-code-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://pet.nfe.go.th/petnfe/userfiles/files/minecraft-java-edition-key-free_GM479516143.pdfIn PDF document text
    • http://pet.nfe.go.th/petnfe/userfiles/files/how-to-get-the-stuff-from-roblox-hack-week-2021_GM431946152.pdfIn PDF document text
    • http://pet.nfe.go.th/petnfe/userfiles/files/free-roblox-sex-games_GM431946152.pdfIn PDF document text
    • http://pet.nfe.go.th/petnfe/userfiles/files/free-robux-no-anti-bot-verification_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 7

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_off00002a65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2A65 22156 bytes
SHA-256: b3c3935c715d6441cf52ad9137b0964f5b045120a2a565324ae55a9bd4515900
font_01_sfnt_off00005b18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B18 19192 bytes
SHA-256: cebd083882c8621ebadf846342542ec861d74e33d29775987ceeae227ba45d4c

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