Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e35d879904c0041…

MALICIOUS

PDF

33.6 KB Created: 2021-06-20 00:34:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 8c14afd8df6e08680051870427d8f2e2 SHA-1: 85ba448b0d80fdc692cd664e9cf072ffd0e9c6d9 SHA-256: 5e35d879904c0041271f4de24fafcf3d604a9c9824503acfaf04e993a4376ffc
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links, including one identified as a malicious redirector. The primary lure is a 'free Robux generator' which directs users to the malicious URL http://netcdn.co/app/431946152/free-robux-generator-no-verification-2021-game-hack. The presence of multiple similar lures suggests a campaign focused on tricking users into visiting potentially harmful sites. No scripts were extracted from this sample.

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.co/app/431946152/free-robux-generator-no-verification-2021-game-hack In PDF document text
    • http://kfz-werkstatt-etp.de/images/free-minecraft-java-account_GM479516143.pdfIn PDF document text
    • http://kfz-werkstatt-etp.de/images/free-roblox-codes_GM431946152.pdfIn PDF document text
    • http://kfz-werkstatt-etp.de/images/roblox-free-robux-com_GM431946152.pdfIn PDF document text
    • http://kfz-werkstatt-etp.de/images/roblox-studio-free-download-windows-10_GM431946152.pdfIn PDF document text
    • http://kfz-werkstatt-etp.de/images/rbx-gg-free-robux_GM431946152.pdfIn PDF document text
    • http://kfz-werkstatt-etp.de/images/i-want-free-robux_GM431946152.pdfIn PDF document text
    • http://kfz-werkstatt-etp.de/images/roblox-play-now-for-free_GM431946152.pdfIn PDF document text
    • http://kfz-werkstatt-etp.de/images/coin-master-hack-mod_GM406889139.pdfIn PDF document text
    • http://kfz-werkstatt-etp.de/images/how-to-hack-on-apocalypse-rising-roblox_GM431946152.pdfIn PDF document text
    • http://kfz-werkstatt-etp.de/images/how-do-you-hack-minecraft_GM479516143.pdfIn PDF document text
    • http://kfz-werkstatt-etp.de/images/coin-master-spin-hack-without-verification_GM406889139.pdfIn PDF document text
    • http://kfz-werkstatt-etp.de/images/how-to-get-free-outrageous-builders-club-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://kfz-werkstatt-etp.de/images/how-to-become-a-roblox-hacker_GM431946152.pdfIn PDF document text
    • http://kfz-werkstatt-etp.de/images/coin-master-gold-cards-hack_GM406889139.pdfIn PDF document text
    • http://kfz-werkstatt-etp.de/images/wizard-roblox-hack_GM431946152.pdfIn PDF document text
    • http://kfz-werkstatt-etp.de/images/how-to-hack-roblox-games_GM431946152.pdfIn PDF document text
    • http://kfz-werkstatt-etp.de/images/coin-master-gift-link-hack_GM406889139.pdfIn PDF document text
    • http://kfz-werkstatt-etp.de/images/minecraft-bedrock-edition-pc-download-free_GM479516143.pdfIn PDF document text
    • http://kfz-werkstatt-etp.de/images/free-tiktok-likes-no-verification_GM835599320.pdfIn PDF document text
    • http://kfz-werkstatt-etp.de/images/coin-master-hack-mobile_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_off00002e0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E0B 21324 bytes
SHA-256: 329c837179ee6e95afea514d84cef62154fea8951191c6ee98e67cbc0cd82490
font_01_sfnt_off00005ca4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5CA4 19476 bytes
SHA-256: 422264a0cdeadcdb3e2ce6070f5cb4f9bd6f0b6f51af0cd9a99234ab5f0c0b46

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