Malicious PDF — malware analysis report

Static analysis result for SHA-256 b4410e311956917b…

MALICIOUS

PDF

36.4 KB Created: 2021-07-03 18:55:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 3356059e53f6e7f4aefd5ce9b0aaf27c SHA-1: 5f6a6a451f24340266a72542bcab62c0e606af13 SHA-256: b4410e311956917bbd26b5de29a59b00c6bd493861740e2acfc96d93fdee6262
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links designed to lure users to free game currency generators and hacks, redirecting them through malicious infrastructure. The document body and heuristics indicate a scam designed to exploit user interest in popular games. While no scripts were directly extracted, the PDF structure and embedded links strongly suggest a malicious redirection workflow.

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.
  • 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.
  • 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/free-robux-no-human-verification-2021-game-hack In PDF document text
    • https://creationegyptco.com/userfiles/files/how-to-get-minecraft-for-free-on-mobile_GM479516143.pdfIn PDF document text
    • https://creationegyptco.com/userfiles/files/free-robux-gift-card_GM431946152.pdfIn PDF document text
    • https://creationegyptco.com/userfiles/files/coin-master-free-spin-and-coins-links-2021_GM406889139.pdfIn PDF document text
    • https://creationegyptco.com/userfiles/files/how-to-get-coin-master-card-free_GM406889139.pdfIn PDF document text
    • https://creationegyptco.com/userfiles/files/coin-master-free-coins-and-spins_GM406889139.pdfIn PDF document text
    • https://creationegyptco.com/userfiles/files/coin-master-hack-no-verify_GM406889139.pdfIn PDF document text
    • https://creationegyptco.com/userfiles/files/where-to-buy-pubg-uc_GM1330123889.pdfIn PDF document text
    • https://creationegyptco.com/userfiles/files/how-to-see-chegg-answers-free-tiktok_GM835599320.pdfIn PDF document text
    • https://creationegyptco.com/userfiles/files/minecraft-hacked-client-18_GM479516143.pdfIn PDF document text
    • https://creationegyptco.com/userfiles/files/free-robux-generator-no-human-verification-or-surveys_GM431946152.pdfIn PDF document text
    • https://creationegyptco.com/userfiles/files/free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://creationegyptco.com/userfiles/files/minecraft-bedrock-edition-pc-free_GM479516143.pdfIn PDF document text
    • https://creationegyptco.com/userfiles/files/coin-master-hack-tool-india_GM406889139.pdfIn PDF document text
    • https://creationegyptco.com/userfiles/files/free-2021-robux_GM431946152.pdfIn PDF document text
    • https://creationegyptco.com/userfiles/files/roblox-juwelen-hack-mad-paintball_GM431946152.pdfIn PDF document text
    • https://creationegyptco.com/userfiles/files/robux-generator-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • https://creationegyptco.com/userfiles/files/free-robux-no-verification-required_GM431946152.pdfIn PDF document text
    • https://creationegyptco.com/userfiles/files/can-you-actually-get-free-robux_GM431946152.pdfIn PDF document text
    • https://creationegyptco.com/userfiles/files/coin-master-free-spin-and-coin-links_GM406889139.pdfIn PDF document text
    • https://creationegyptco.com/userfiles/files/minecraft-for-ps3-free_GM479516143.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_off000034cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x34CF 22496 bytes
SHA-256: 7fd5f85296d26d6c421b150da99fd20eeecdc0de89124db229bb90c11342cf10
font_01_sfnt_off0000672b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x672B 19736 bytes
SHA-256: 354295dcb16db07fec6852cf507e3dd09a8f39b1f712ecea2001cf8559992bf9

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