Malicious PDF — malware analysis report

Static analysis result for SHA-256 8752b56d45025abd…

MALICIOUS

PDF

34.7 KB Created: 2021-07-01 17:35:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 467163f474aa7b9a27e2f6129bdc5625 SHA-1: 97b36e053cf4aae6fd6b09c7fbc3b000b9405d07 SHA-256: 8752b56d45025abd8e9d3e8f291c8a248d2dd02719c75b48e5a3c9054543591b
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure related to game hacks and free currency, directing users to a malicious redirector. The redirector, in turn, serves further malicious PDF files hosted on the htdvn.com domain. The ML classifier strongly indicates maliciousness, and the presence of multiple links to known malicious infrastructure supports this assessment.

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/how-to-get-free-faces-on-roblox-no-download-game-hack In PDF document text
    • https://htdvn.com/public/upload/files/mine-minecraft-games-for-free_GM479516143.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/robux-free-online_GM431946152.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/get-free-robux-no-download-no-verification_GM431946152.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/robux-rewards_GM431946152.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/how-to-play-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/roblox-free-robux-com_GM431946152.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/how-to-get-free-coins-and-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/free-robux-gift-card_GM431946152.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/how-to-hack-a-account-on-roblox-2021_GM431946152.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/free-roblox-intros_GM431946152.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/coin-master-free-link-today_GM406889139.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/free-minecraft-premium-account_GM479516143.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/coin-master-hack-app-2021-download_GM406889139.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/free-coins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/robux-hack-me_GM431946152.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/roblox-hack-2021-forum_GM431946152.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/minecraft-classic-free_GM479516143.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/free-minecraft-texture-packs-java_GM479516143.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/roblox-hack-unlimited-robux_GM431946152.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/get-tiktok-followers-free_GM835599320.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_off00003004.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3004 22344 bytes
SHA-256: 2a3011c1ad8263925fd46ef0a09e8d28965bb7547b579fa651be91f1347830d6
font_01_sfnt_off000061a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61A6 19260 bytes
SHA-256: 5e6c599521cfd4df42ad9c2180b00406eda44750db3fb9e917683d41e834cc04

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