Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7158205e2bd9be6…

MALICIOUS

PDF

34.6 KB Created: 2021-07-04 17:46:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 320a432f69cca467fd5ac85092e1aa3c SHA-1: 1a6101cd92a4d76a051dbb50a76947ade9802258 SHA-256: b7158205e2bd9be6c5c155f7ae1ce914d01788ae24d1fee8f3090a40b38661a0
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to known malicious redirectors, specifically advertising free game hacks and generators. The primary lure URL is http://netcdn.tw/app/431946152/how-to-get-free-roblox-game-hack, which is part of a network of sites distributing potentially unwanted or malicious content. The document's structure and embedded URLs suggest a social engineering tactic to drive traffic to these sites, likely for further malware distribution or phishing.

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.tw/app/431946152/how-to-get-free-roblox-game-hack In PDF document text
    • https://vierabyragazze.com/upload/files/free-robux-without-offers_GM431946152.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/free-robux-for-kids-no-verification_GM431946152.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/coin-master-links-for-free-spins-2021_GM406889139.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/assassin-item-hacks-roblox_GM431946152.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/robux-hacks-code-admin-commands_GM431946152.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/coin-master-free-soins_GM406889139.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/minecraft-multiplayer-free_GM479516143.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/free-robux-no-survey-or-human-verification_GM431946152.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/download-free-robux-hack-on-pc-for-free_GM431946152.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/free-20210-robux-2021_GM431946152.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/roblox-free-catalog-hack_GM431946152.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/free-robux-microsoft_GM431946152.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/roblox-free-robux_GM431946152.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/best-minecraft-hacked-client-2021_GM479516143.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/roblox-hack-mobilenerator-net_GM431946152.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/hack-coin-master-343-apk_GM406889139.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/roblox-free-robux-on-ipad_GM431946152.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/robloxfun-com-robux_GM431946152.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/coin-master-hack-safe_GM406889139.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/coin-master-link-for-spins_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_off000030c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30C7 22264 bytes
SHA-256: 67c1b9bc90b8a532ace6bf9cf7b726d1f2d0df67e966afde1b65dd64bd35544b
font_01_sfnt_off00006267.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6267 18920 bytes
SHA-256: 0cab8882f4c0675f5f492e8a84821542f7287f297f1ea8a50a76f0af58ce7d74

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