Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6480e250f840833…

MALICIOUS

PDF

35.3 KB Created: 2021-06-20 16:48:53 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 1b52fc0114b58b6306dc4c1b94277892 SHA-1: 5e851b21f22b6161b4ea23f8fe88113570c4b0c7 SHA-256: c6480e250f8408331aa99b0c3d4b10a8c42c18f2e997e3eaced326e7efbb9b70
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to a known malicious redirector infrastructure, specifically advertising 'game hacks' and 'cheats'. The primary lure URL is http://netcdn.co/app/431946152/roblox-straight-awayu-cheats-for-money-on-roblox-game-hack. This suggests the document is designed to trick users into visiting malicious sites, likely for financial scams or further malware delivery. No scripts were extracted, but the embedded URLs and heuristic firings strongly indicate a malicious intent.

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-straight-awayu-cheats-for-money-on-roblox-game-hack In PDF document text
    • https://purihostel.com/assets/CKImages/files/wurst-hacked-client-112-2_GM479516143.pdfIn PDF document text
    • https://purihostel.com/assets/CKImages/files/free-coin-master-spins-without-human-verification_GM406889139.pdfIn PDF document text
    • https://purihostel.com/assets/CKImages/files/coin-master-free-spins-hack-but-no-surveys_GM406889139.pdfIn PDF document text
    • https://purihostel.com/assets/CKImages/files/pubg-uc-600_GM1330123889.pdfIn PDF document text
    • https://purihostel.com/assets/CKImages/files/free-spin-link-coin-master-app_GM406889139.pdfIn PDF document text
    • https://purihostel.com/assets/CKImages/files/coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
    • https://purihostel.com/assets/CKImages/files/how-do-you-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://purihostel.com/assets/CKImages/files/free-coin-master-spins_GM406889139.pdfIn PDF document text
    • https://purihostel.com/assets/CKImages/files/free-robux-websites-no-human-verification_GM431946152.pdfIn PDF document text
    • https://purihostel.com/assets/CKImages/files/coin-master-deals_GM406889139.pdfIn PDF document text
    • https://purihostel.com/assets/CKImages/files/how-to-get-hacks-on-roblox_GM431946152.pdfIn PDF document text
    • https://purihostel.com/assets/CKImages/files/free-robux-no-apps_GM431946152.pdfIn PDF document text
    • https://purihostel.com/assets/CKImages/files/minecraft-account-hacked_GM479516143.pdfIn PDF document text
    • https://purihostel.com/assets/CKImages/files/coin-master-free-spins-link-whatsapp-group_GM406889139.pdfIn PDF document text
    • https://purihostel.com/assets/CKImages/files/spin-free-coin-master_GM406889139.pdfIn PDF document text
    • https://purihostel.com/assets/CKImages/files/roblox-robux-hack-generator_GM431946152.pdfIn PDF document text
    • https://purihostel.com/assets/CKImages/files/how-do-i-hack-roblox-games_GM431946152.pdfIn PDF document text
    • https://purihostel.com/assets/CKImages/files/coin-master-free-spins-glitch_GM406889139.pdfIn PDF document text
    • https://purihostel.com/assets/CKImages/files/how-to-hack-roblox-mad-city-gui_GM431946152.pdfIn PDF document text
    • https://purihostel.com/assets/CKImages/files/free-robux_GM431946152.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_off0000305c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x305C 22720 bytes
SHA-256: 05b5e8f5713fddbec92b0f10df68acc4b2a5d31b9966a70c21d79cc006464f07
font_01_sfnt_off0000634f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x634F 19720 bytes
SHA-256: defeeef483af068bcd8d26a0499d3f4015f8b98cc61820974b9de2cc9af7e1e5

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