Malicious PDF — malware analysis report

Static analysis result for SHA-256 8cc62626f1ae8fa3…

MALICIOUS

PDF

34.7 KB Created: 2021-06-17 17:19:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-11
MD5: b5c29155b95e024c7e72d6c1b62dc3f0 SHA-1: 9c665832171636515c03be2696074b8ef99fea2b SHA-256: 8cc62626f1ae8fa3e8f19565dfc27acfb16d35ff50fb3f473eaf64a8bfb6d58d
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that redirect to a website promising free game currency ('Robux'). Heuristics indicate these links point to known malicious redirector infrastructure. The document body text explicitly mentions 'Como Tener Robux Gratis Facil Y Rapido Sin Hack' and includes the malicious URL, reinforcing the lure. No scripts were extracted, but the primary attack vector appears to be a phishing lure leading to a malicious site.

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/como-tener-robux-gratis-facil-y-rapido-sin-hack-game-hack In PDF document text
    • https://fordogtrainers.mx:443/images/coin-master-free-spins-ios-app_GM406889139.pdfIn PDF document text
    • https://fordogtrainers.mx:443/images/free-robux-hack-us_GM431946152.pdfIn PDF document text
    • https://fordogtrainers.mx:443/images/how-to-get-free-robux-on-chromebook_GM431946152.pdfIn PDF document text
    • https://fordogtrainers.mx:443/images/coin-master-free-cards-link-2021_GM406889139.pdfIn PDF document text
    • https://fordogtrainers.mx:443/images/coin-master-daily-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • https://fordogtrainers.mx:443/images/rbxfree-com-free-robux_GM431946152.pdfIn PDF document text
    • https://fordogtrainers.mx:443/images/free-spin-online-tool-coin-master_GM406889139.pdfIn PDF document text
    • https://fordogtrainers.mx:443/images/claim-free-robux_GM431946152.pdfIn PDF document text
    • https://fordogtrainers.mx:443/images/coin-master-free-coins-and-spins-link-today_GM406889139.pdfIn PDF document text
    • https://fordogtrainers.mx:443/images/best-free-minecraft-hacked-client_GM479516143.pdfIn PDF document text
    • https://fordogtrainers.mx:443/images/free-minecraft-mods_GM479516143.pdfIn PDF document text
    • https://fordogtrainers.mx:443/images/how-to-get-free-robux-on-computer_GM431946152.pdfIn PDF document text
    • https://fordogtrainers.mx:443/images/claim-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://fordogtrainers.mx:443/images/roblox-two-player-military-simulator-tycoon-money-hack_GM431946152.pdfIn PDF document text
    • https://fordogtrainers.mx:443/images/coin-master-free-pet-food-links_GM406889139.pdfIn PDF document text
    • https://fordogtrainers.mx:443/images/free-robux-hack-no-verification_GM431946152.pdfIn PDF document text
    • https://fordogtrainers.mx:443/images/how-to-get-free-robux-not-a-scam_GM431946152.pdfIn PDF document text
    • https://fordogtrainers.mx:443/images/how-to-get-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://fordogtrainers.mx:443/images/how-to-get-free-spins-on-coin-master-game_GM406889139.pdfIn PDF document text
    • https://fordogtrainers.mx:443/images/free-roblox-accounts-with-robux-that-work-not-banned_GM431946152.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
font_00_sfnt_off00003043.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3043 21904 bytes
SHA-256: 3c144a4975fc725f137c9fe7f94b6423cac985badd76dcd6bc14aa330aab6789
font_01_sfnt_off00006094.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6094 19768 bytes
SHA-256: 265e576662cf0376360cbfbc7bec84b7db7cd725c0d737ec34366a531151d26a

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