Malicious PDF — malware analysis report

Static analysis result for SHA-256 573b54f3aff6ec1f…

MALICIOUS

PDF

34.8 KB Created: 2021-06-19 04:22:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16
MD5: e271845ec90722881c17dcea18a1347a SHA-1: 4045edb636d0d814b85e1eaa8694f0f7f9a69877 SHA-256: 573b54f3aff6ec1f05f8c161944e1af6d095802f360b6393a3a4861a10d1ded3
180 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document is designed as a lure, using the promise of game hacks and currency to trick users into visiting malicious websites. The document contains multiple embedded URLs, including a known malicious redirector, that lead to further PDFs hosted on an IP address. These subsequent PDFs likely serve as a second stage to deliver malware or conduct further phishing attempts.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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.
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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/robux-and-tix-hack-no-download-game-hack In PDF document text
    • http://103.40.122.33/akasia/repository/roblox-pal-hair-free_GM431946152.pdfPDF link annotation
    • http://103.40.122.33/akasia/repository/roblox-shades-free_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/how-to-hack-roblox-without-a-app_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/free-minecraft-premium-account_GM479516143.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/lawn-mowing-simulator-roblox-hack_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/roblox-bee-swarm-simulator-cheats-2021_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/how-to-get-free-robux-easy_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/how-to-get-free-gamepass-on-roblox_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/how-to-hack-in-roblox-hoops_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/free-daily-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/get-free-tiktok-likes_GM835599320.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/coin-master-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/free-tiktok-followers-no-human-verification-2021_GM835599320.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/free-robux-in-1-sec_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/free-robux-download_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/free-robux-scams_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/how-to-get-free-robux-fast-and-easy_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/hacks-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/20210-robux-free_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/can-you-get-robux-for-free_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_off00002e09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E09 22920 bytes
SHA-256: 95351454089a2687366ae5233c731d6c4c90e9a41a534945b288ac577260f0ae
font_01_sfnt_off000061bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61BD 19420 bytes
SHA-256: 500b00a44bc644f8b8985d2f53c52c877ef0a7333580c9b712c44b10de96c75c

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