Malicious PDF — malware analysis report

Static analysis result for SHA-256 0fa0e61924257b91…

MALICIOUS

PDF

44.6 KB Created: 2021-06-08 21:24:50 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: def096188ee09d917fb06e852239cd53 SHA-1: c8c29fa582a3c8fc6c51d38a2f5345a4f1dce9b0 SHA-256: 0fa0e61924257b911425ec1e4de6548152b5abd0f1f6f97d9ad4c8bea88071ac
200 Risk Score

Malware Insights

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

The PDF document contains a fake CAPTCHA lure and links to a known malicious redirector. The primary link directs users to a site offering 'game hacks', which is a common social engineering tactic. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to lure users to malicious content, likely for further exploitation or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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.tw/app/431946152/hacker-roblox-server-game-hack In PDF document text
    • https://www.atrax.hr/files/coin-master-free-gift-cards_GM406889139.pdfIn PDF document text
    • http://atrax.hr/files/coin-master-hack-2021-no-survey_GM406889139.pdfIn PDF document text
    • http://atrax.hr/files/minecraft-cheats-switch_GM479516143.pdfIn PDF document text
    • http://atrax.hr/files/minecraft-hacked-client-download_GM479516143.pdfIn PDF document text
    • http://atrax.hr/files/hack-coin-master-free_GM406889139.pdfIn PDF document text
    • http://atrax.hr/files/minecraft-mojang-free_GM479516143.pdfIn PDF document text
    • https://www.atrax.hr/files/how-to-get-free-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://www.atrax.hr/files/coin-master-pc-hack-tool_GM406889139.pdfIn PDF document text
    • http://atrax.hr/files/coin-master-free-daily-spins-link_GM406889139.pdfIn PDF document text
    • http://atrax.hr/files/download-coin-master-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • https://www.atrax.hr/files/minecraft-story-mode-free_GM479516143.pdfIn PDF document text
    • http://atrax.hr/files/completed-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://www.atrax.hr/files/free-roblox-generator-for-roblox_GM431946152.pdfIn PDF document text
    • https://www.atrax.hr/files/daily-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://atrax.hr/files/free-robux-pins_GM431946152.pdfIn PDF document text
    • http://atrax.hr/files/how-to-get-free-robux-on-roblox-2021_GM431946152.pdfIn PDF document text
    • https://www.atrax.hr/files/minecraft-free-minecraft_GM479516143.pdfIn PDF document text
    • https://www.atrax.hr/files/minecraft-hacks-wurst_GM479516143.pdfIn PDF document text
    • https://www.atrax.hr/files/robuxglobalcom-no-verification_GM431946152.pdfIn PDF document text
    • http://atrax.hr/files/60-free-spins-coin-master_GM406889139.pdfIn 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005243.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5243 24816 bytes
SHA-256: 8db95e0dadf5923f158d50d8e276dc4ef4b64ad35c368580e2f8e7678dc799d7
font_01_sfnt_off00008b53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B53 18296 bytes
SHA-256: 3232cea47fb02282b8d3a4a0bb516dadd3272bd0374b8d5dbec0c397fbc1df4a

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