Malicious PDF — malware analysis report

Static analysis result for SHA-256 29567ae9db96a9aa…

MALICIOUS

PDF

42.1 KB Created: 2021-05-12 19:00:53 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-31
MD5: f9c719e0e6f361293efea3eb925b6292 SHA-1: 09d4bb1d4c220e1c87b73add9f2833d449cd7c7b SHA-256: 29567ae9db96a9aa375bbb48bbfbe1c8ac324bd2297cda80b843347f1fd1f543
240 Risk Score

Malware Insights

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

The PDF document contains multiple links to redirectors and malicious infrastructure, masquerading as a 'free generator / game hack' lure. It also presents a fake CAPTCHA to trick users into interacting with the malicious content. The ML classifier strongly indicates maliciousness, and the overall structure suggests it's designed to lead users to potentially harmful sites or downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 6

  • 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
  • Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: https://netcdn.xyz/app/431946152/get-robux-now-game-hack.
  • 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/get-robux-now-game-hack In PDF document text
    • https://itv-grabungen.de/images/free-roblox-website_GM431946152.pdfIn PDF document text
    • https://itv-grabungen.de/images/can-you-get-minecraft-for-free-on-pc_GM479516143.pdfIn PDF document text
    • https://itv-grabungen.de/images/free-roblox-hack-us_GM431946152.pdfIn PDF document text
    • https://itv-grabungen.de/images/coin-master-free-link-2021_GM406889139.pdfIn PDF document text
    • https://itv-grabungen.de/images/free-robux-com_GM431946152.pdfIn PDF document text
    • https://itv-grabungen.de/images/free-spin-link-coin-master_GM406889139.pdfIn PDF document text
    • https://itv-grabungen.de/images/roblox-games-with-free-vip-servers_GM431946152.pdfIn PDF document text
    • https://itv-grabungen.de/images/minecraft-for-laptop-free_GM479516143.pdfIn PDF document text
    • https://itv-grabungen.de/images/free-spins-coin-master-cheats_GM406889139.pdfIn PDF document text
    • https://itv-grabungen.de/images/how-to-get-free-robux-without-download-apps-or-survey_GM431946152.pdfIn PDF document text
    • https://itv-grabungen.de/images/robux-free-robux_GM431946152.pdfIn PDF document text
    • https://itv-grabungen.de/images/coin-master-tiradas-gratis-2021_GM406889139.pdfIn PDF document text
    • https://itv-grabungen.de/images/coin-master-hack-spins-apk_GM406889139.pdfIn PDF document text
    • https://itv-grabungen.de/images/haktuts-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://itv-grabungen.de/images/free-roblox-adopt-me-accounts_GM431946152.pdfIn PDF document text
    • https://itv-grabungen.de/images/blogspot-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://itv-grabungen.de/images/coin-master-hacks-no-surveys_GM406889139.pdfIn PDF document text
    • https://itv-grabungen.de/images/free-spin-link-of-coin-master_GM406889139.pdfIn PDF document text
    • https://itv-grabungen.de/images/robux-hack-me_GM431946152.pdfIn PDF document text
    • https://itv-grabungen.de/images/roblox-piano-hack_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
stream_003_off0000492c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x492C 24944 bytes
SHA-256: 72f56feba00cfb858a45f50d72b10de3be725e873da4a066010887b166247403
font_01_sfnt_off00008244.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8244 18120 bytes
SHA-256: 9c3ce8d7b0d85fdff3917ffd210604c934acd68a905ece7635225fd3f48c16bc

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