Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d0c7aa7a6562bff…

MALICIOUS

PDF

47.6 KB Created: 2021-06-07 07:42:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 7d22213720e3e06247c37c5fb263c9d1 SHA-1: a9c43d3212bd06a5116374dfd0bb3b678bc35c2e SHA-256: 6d0c7aa7a6562bffaa16293bd87e3145a3901de7852fea39abf68ca8dc1e2ecc
222 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document employs a common lure of 'game hacks' and 'free currency' to entice users. It contains numerous links to external websites, many of which appear to be part of a link farm designed to host similar lures. The document body and heuristics indicate a redirection to malicious sites, likely for phishing or malware distribution. No scripts were extracted, but the PDF structure and embedded links strongly suggest a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9832

Heuristics 7

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • PDF links to a 'free generator / game hack' redirector high 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.
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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 https://netcdn.tw/app/431946152/cmd-hack-roblox-game-hack PDF link annotation
    • https://vierabyragazze.com/upload/files/free-robux-no-human-verify_GM431946152.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/wurst_GM479516143.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/coin-master-hack-without-verification-ios_GM406889139.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/free-spins-for-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/inappropriate-roblox-games-2021_GM431946152.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/how-to-get-free-robux-without-verifying-2021_GM431946152.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/www-cheatsk-com-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/coin-master-hack-without-verify_GM406889139.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/roblox40com-robux_GM431946152.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/how-to-hack-and-get-free-robux_GM431946152.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/how-to-get-free-robux-website_GM431946152.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/wurst-112_GM479516143.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/how-to-make-robux_GM431946152.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/minecraft-svg-free_GM479516143.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/games-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/master-coin-free-link_GM406889139.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/ear-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/daily-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/free-spin-link-coin-master-today_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005281.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5281 32280 bytes
SHA-256: 07b98e4fa73fbbc049dcd892a950d029e5a696f5a27f9aadc75fbf8281c55461
font_01_sfnt_off000096d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x96D4 18616 bytes
SHA-256: 62c8770a6d724304639ac28705f08831956a5f1c63b2f7698395580e91e49831

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