Malicious PDF — malware analysis report

Static analysis result for SHA-256 95ffbcbfed103aea…

MALICIOUS

PDF

42.4 KB Created: 2021-05-18 05:36:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 87dc8855f09f9b27dab0cf34d87d7403 SHA-1: 31536b4652e2ce4a706766df63785fcde24feb4c SHA-256: 95ffbcbfed103aeaa30c662dee48b9565475c207b188e0b7f1df986edf9b691a
200 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains a lure for a 'free generator / game hack' which redirects to malicious infrastructure. The presence of a fake CAPTCHA prompt suggests an attempt to trick the user into interacting with the document in a way that could lead to further compromise. No scripts were extracted, but the embedded URL is a primary indicator of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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.
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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 https://netcdn.xyz/app/431946152/free-roblox-clothes-girl-game-hack In PDF document text
    • http://xn--59-6kcusgqlmfgen3m.xn--p1ai/images/how-do-you-get-free-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://xn--59-6kcusgqlmfgen3m.xn--p1ai/images/free-coin-master-spins-2021_GM406889139.pdfIn PDF document text
    • http://xn--59-6kcusgqlmfgen3m.xn--p1ai/images/how-to-get-free-robux-with-no-verification_GM431946152.pdfIn PDF document text
    • http://xn--59-6kcusgqlmfgen3m.xn--p1ai/images/minecraft-com-free_GM479516143.pdfIn PDF document text
    • http://xn--59-6kcusgqlmfgen3m.xn--p1ai/images/how-do-i-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://xn--59-6kcusgqlmfgen3m.xn--p1ai/images/free-foxy-food-coin-master_GM406889139.pdfIn PDF document text
    • http://xn--59-6kcusgqlmfgen3m.xn--p1ai/images/cute-free-hair-on-roblox_GM431946152.pdfIn PDF document text
    • http://xn--59-6kcusgqlmfgen3m.xn--p1ai/images/haktuts-coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
    • http://xn--59-6kcusgqlmfgen3m.xn--p1ai/images/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://xn--59-6kcusgqlmfgen3m.xn--p1ai/images/coin-master-spin-ml_GM406889139.pdfIn PDF document text
    • http://xn--59-6kcusgqlmfgen3m.xn--p1ai/images/www-roblox-com-robux-free_GM431946152.pdfIn PDF document text
    • http://xn--59-6kcusgqlmfgen3m.xn--p1ai/images/how-to-get-free-robux-on-ipad_GM431946152.pdfIn PDF document text
    • http://xn--59-6kcusgqlmfgen3m.xn--p1ai/images/minecraft-112-2-hacked-client_GM479516143.pdfIn PDF document text
    • http://xn--59-6kcusgqlmfgen3m.xn--p1ai/images/how-to-get-free-robux-no-survey_GM431946152.pdfIn PDF document text
    • http://xn--59-6kcusgqlmfgen3m.xn--p1ai/images/free-games-like-coin-master_GM406889139.pdfIn PDF document text
    • http://xn--59-6kcusgqlmfgen3m.xn--p1ai/images/microsoft-roblox_GM431946152.pdfIn PDF document text
    • http://xn--59-6kcusgqlmfgen3m.xn--p1ai/images/coin-master-free-spin-today-2021_GM406889139.pdfIn PDF document text
    • http://xn--59-6kcusgqlmfgen3m.xn--p1ai/images/free-robux-hack-no-verification_GM431946152.pdfIn PDF document text
    • http://xn--59-6kcusgqlmfgen3m.xn--p1ai/images/coin-master-hacks-for-spins_GM406889139.pdfIn PDF document text
    • http://xn--59-6kcusgqlmfgen3m.xn--p1ai/images/free-clothing-on-roblox_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_off00004832.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4832 25784 bytes
SHA-256: 7751ec287be43fc4a19cf2e396fe937216d56a0c8eacd6e05a2e80303bc9f1f5
font_01_sfnt_off0000836b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x836B 18340 bytes
SHA-256: d29ec2e71bb068e77f351b4d123c990b41e31d257b9d9cf8b177703eed95a4a4

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