Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab8af46df82a2950…

MALICIOUS

PDF

36.1 KB Created: 2021-06-29 07:29:32 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: f7ccf1f7af3f9c8829f876a93f46ec74 SHA-1: 7313847663d5eefe9d357102feabaa472ba37790 SHA-256: ab8af46df82a29501ff218b9a13499e0573fb4711003401951b435ac70e0da69
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, masquerading as game hacks or generators. The primary lure URL is http://netcdn.co/app/431946152/how-to-run-fast-roblox-the-strets-hack-game-hack. While no scripts were explicitly extracted, the PDF structure and heuristic firings indicate a malicious redirector workflow, likely intended to lead users to phishing or malware download sites.

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/how-to-run-fast-roblox-the-strets-hack-game-hack In PDF document text
    • http://razredna-nastava.net/files/how-to-get-free-robux-without-verification_GM431946152.pdfIn PDF document text
    • http://razredna-nastava.net/files/how-to-get-clothes-for-free-roblox_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/free-roblox-accounts-with-robux-that-work-not-banned-2021_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/free-spins-coins-coin-master_GM406889139.pdfIn PDF document text
    • http://razredna-nastava.net/files/best-hack-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://razredna-nastava.net/files/how-to-get-free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/roblox-hack-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • http://razredna-nastava.net/files/how-to-change-your-username-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://razredna-nastava.net/files/free-spins-coin-master-2021-app_GM406889139.pdfIn PDF document text
    • https://razredna-nastava.net/files/how-to-get-free-robux-quick-and-easy-2021_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/coin-master-hack-app-for-iphone_GM406889139.pdfIn PDF document text
    • http://razredna-nastava.net/files/free-robux-without-verification-or-survey_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/free-minecraft-skins-pe_GM479516143.pdfIn PDF document text
    • https://razredna-nastava.net/files/coin-master-hack-apk-download-2021_GM406889139.pdfIn PDF document text
    • http://razredna-nastava.net/files/free-spins-coin-master-daily_GM406889139.pdfIn PDF document text
    • http://razredna-nastava.net/files/rewards-roblox-com_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/i-was-hacked-in-roblox_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/roblox-free-abs-t-shirt_GM431946152.pdfIn PDF document text
    • http://razredna-nastava.net/files/coin-master-free-spins-moonactive_GM406889139.pdfIn PDF document text
    • http://razredna-nastava.net/files/how-to-get-free-robux-no-inspecting_GM431946152.pdfIn PDF document text
    • https://www.roblox.com/.IIn 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_off0000332e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x332E 23200 bytes
SHA-256: 052f884f4850250456acfae4b98c820bc3b3ad7d2b5f378526d70c6c19b4b286
font_01_sfnt_off0000672b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x672B 19392 bytes
SHA-256: c551af05ad8214cab9ba9dab8127af9317e194ae001ab77df0537448e50b9368

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