Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7b004a772562072…

MALICIOUS

PDF

35.1 KB Created: 2021-07-09 04:06:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 3798a83e3cac6e52d583dd8b240598d2 SHA-1: abd426b43a08b0565d0bdcae245cae70b08184bc SHA-256: a7b004a7725620727c398e46cffeeb236c656da24b7b13dcd2047536d1841ae4
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains lures for free Robux and game hacks, directing users to a known malicious redirector URL. The embedded URLs and document body content strongly suggest a phishing or scam attempt designed to trick users into visiting malicious sites. While no scripts were explicitly extracted, the nature of the lures and the presence of redirector links indicate a high likelihood of further malicious activity, such as downloading additional payloads or leading to credential harvesting pages.

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/free-robux-no-human-verification-or-survey-2021-game-hack In PDF document text
    • https://www.iseas.com/uploaded_files/userfiles/files/play-coin-master_GM406889139.pdfIn PDF document text
    • https://www.iseas.com/uploaded_files/userfiles/files/free-robux-generator-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • https://www.iseas.com/uploaded_files/userfiles/files/robux-hack-2021-pastebin_GM431946152.pdfIn PDF document text
    • https://www.iseas.com/uploaded_files/userfiles/files/robux-hack-no-questions_GM431946152.pdfIn PDF document text
    • https://www.iseas.com/uploaded_files/userfiles/files/hack-para-obtener-robux_GM431946152.pdfIn PDF document text
    • https://www.iseas.com/uploaded_files/userfiles/files/hack-skybox-roblox_GM431946152.pdfIn PDF document text
    • https://www.iseas.com/uploaded_files/userfiles/files/how-to-get-free-unlimited-robux_GM431946152.pdfIn PDF document text
    • https://www.iseas.com/uploaded_files/userfiles/files/boost9-com-roblox-hack_GM431946152.pdfIn PDF document text
    • https://www.iseas.com/uploaded_files/userfiles/files/roblox-bloxburg-vehicle-speed-hack_GM431946152.pdfIn PDF document text
    • https://www.iseas.com/uploaded_files/userfiles/files/minecraft-toolbox-premium-apk_GM479516143.pdfIn PDF document text
    • https://www.iseas.com/uploaded_files/userfiles/files/coin-master-extra-spins_GM406889139.pdfIn PDF document text
    • https://www.iseas.com/uploaded_files/userfiles/files/how-to-download-synapse-x-free-roblox_GM431946152.pdfIn PDF document text
    • https://www.iseas.com/uploaded_files/userfiles/files/roblox-mad-paintball-2-free_GM431946152.pdfIn PDF document text
    • https://www.iseas.com/uploaded_files/userfiles/files/classic-minecraft-net-hacks_GM479516143.pdfIn PDF document text
    • https://www.iseas.com/uploaded_files/userfiles/files/free-spins-and-coins-coin-master-link-2021_GM406889139.pdfIn PDF document text
    • https://www.iseas.com/uploaded_files/userfiles/files/hack-coin-master-mod-apk_GM406889139.pdfIn PDF document text
    • https://www.iseas.com/uploaded_files/userfiles/files/free-robux-using-inspect-element_GM431946152.pdfIn PDF document text
    • https://www.iseas.com/uploaded_files/userfiles/files/how-to-hack-roblox-accounts-passwords_GM431946152.pdfIn PDF document text
    • https://www.iseas.com/uploaded_files/userfiles/files/how-to-get-free-roblox_GM431946152.pdfIn PDF document text
    • https://www.iseas.com/uploaded_files/userfiles/files/i-need-robux_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_off000030c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30C8 21804 bytes
SHA-256: 99f2d9f30fbcb3ec2f308b066760fe33f3d40f8f2458cf922aca2ebbea08d1aa
font_01_sfnt_off0000612f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x612F 20028 bytes
SHA-256: a686843967d16d630a3d792aecd0df7810ef9440d33d67b3fe7886ce86e787de

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