Malicious PDF — malware analysis report

Static analysis result for SHA-256 b049f9f38b5aa54d…

MALICIOUS

PDF

34.3 KB Created: 2021-07-04 00:03:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: dc2aeadee4290a70e80242655a0c560f SHA-1: 4eb95ef7dc9dc251ab8349e211522cebc197cf8e SHA-256: b049f9f38b5aa54da851a56b048e315dc3c825cde08ab8eccf778d2adc95fcdb
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to a known malicious redirector, which is designed to lure users into downloading potentially malicious files or visiting scam websites. The document body and extracted URLs suggest a scam related to free game currency or hacks, indicating a phishing or social engineering attack. No scripts were extracted, but the presence of embedded URLs and the lure content strongly suggest a malicious intent.

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.tw/app/406889139/50-free-spins-coin-master-game-hack In PDF document text
    • https://vierabyragazze.com/upload/files/free-robux-no-verification_GM431946152.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/hacks-for-roblox-csgo_GM431946152.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/how-to-hack-roblox-accounts-with-edit-this-cookie-2021_GM431946152.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/robux-in_GM431946152.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/roblox-hack-with-robux_GM431946152.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/roblox-imagine_GM431946152.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/is-there-a-way-to-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/free-esp-hack-roblox_GM431946152.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/free-roaming-camera-roblox_GM431946152.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/free-robux-by-watching-ads_GM431946152.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/free-robux-with-no-verifcation-surveys_GM431946152.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/how-to-get-free-tiktok-coins_GM835599320.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/robux-hacks-code-admin-commands_GM431946152.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/roblox-arsenal-hack-script-pastebin_GM431946152.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/free-minecraft-java-server_GM479516143.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/how-to-get-free-robux-inspect_GM431946152.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/minecraft-free-exe_GM479516143.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/instagram-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/coin-master-daily-free-spins-25_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
font_00_sfnt_off00002f77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F77 23140 bytes
SHA-256: cae427b7473434c46aded3eab7463f5045f287cb96b0f7b5db430e1695fe1972
font_01_sfnt_off000062be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62BE 18480 bytes
SHA-256: f050a5cb8527be99d3c3e84738d571a41e36df8bd1ad63ca537930e630161d23

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