Malicious PDF — malware analysis report

Static analysis result for SHA-256 7587ffed14021aeb…

MALICIOUS

PDF

47.6 KB Created: 2021-05-19 01:34:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 2ec157e59e70fbb3bc4c5dccbb862dfd SHA-1: 8ca220922d74171f92b6fb8f32f2a0b383d66937 SHA-256: 7587ffed14021aebadf2d1e7f7bec0dc793b5812b432e93d176674b443f15d77
200 Risk Score

Malware Insights

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

The PDF document contains multiple links to redirector domains, masquerading as game hacks and free currency generators. It also presents a fake CAPTCHA to trick the user into interacting with the document, likely to initiate a download or exploit. The primary malicious URL identified is https://netcdn.xyz/app/431946152/free-robux-without-doing-anything-game-hack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9013

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-robux-without-doing-anything-game-hack In PDF document text
    • https://lesegais.ru/images/free-coins-on-coin-master-without-verification_GM406889139.pdfIn PDF document text
    • https://lesegais.ru/images/coin-master-free-spin-and-coin-link-app_GM406889139.pdfIn PDF document text
    • https://lesegais.ru/images/hack-coin-master-online_GM406889139.pdfIn PDF document text
    • https://lesegais.ru/images/how-to-get-a-free-minecraft-account_GM479516143.pdfIn PDF document text
    • https://lesegais.ru/images/easy-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://lesegais.ru/images/best-tricks-co-robux_GM431946152.pdfIn PDF document text
    • https://lesegais.ru/images/daily-coin-master_GM406889139.pdfIn PDF document text
    • https://lesegais.ru/images/free-robux-easy_GM431946152.pdfIn PDF document text
    • https://lesegais.ru/images/hacks-for-coin-master_GM406889139.pdfIn PDF document text
    • https://lesegais.ru/images/coin-master-free-daily-rewards_GM406889139.pdfIn PDF document text
    • https://lesegais.ru/images/free-robux-accounts-2021_GM431946152.pdfIn PDF document text
    • https://lesegais.ru/images/coins-master-hacks_GM406889139.pdfIn PDF document text
    • https://lesegais.ru/images/coin-master-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • https://lesegais.ru/images/free-robux-no-verification-2021_GM431946152.pdfIn PDF document text
    • https://lesegais.ru/images/free-robux-hacker-us_GM431946152.pdfIn PDF document text
    • https://lesegais.ru/images/coun-master_GM406889139.pdfIn PDF document text
    • https://lesegais.ru/images/coin-master-hack-2021-apk-download_GM406889139.pdfIn PDF document text
    • https://lesegais.ru/images/free-spins-and-coins-coin-master-2021-link_GM406889139.pdfIn PDF document text
    • https://lesegais.ru/images/free-roblox-hack_GM431946152.pdfIn PDF document text
    • https://lesegais.ru/images/robux-hacks-2021_GM431946152.pdfIn PDF document text
    • https://rblx.landIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000047ed.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x47ED 30092 bytes
SHA-256: 31fbf096af12f7b727bb421b725386df77e4f6a4f7e5e53e09a7ff12c1e2a956
font_01_sfnt_off00008a8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A8D 2928 bytes
SHA-256: d27ca7269cc665f7c566dcba71d1fcbd1348614b7b6242da2500f0713fcbc8bc
font_02_sfnt_off000094ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x94AC 19240 bytes
SHA-256: e1e4d521198b5ef2bb2d2ba3e061f6fd747e7988b39df69dcb6ecbaf810b6a5c

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