Malicious PDF — malware analysis report

Static analysis result for SHA-256 6bd92157007d6d02…

MALICIOUS

PDF

35.0 KB Created: 2021-06-18 23:02:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 699073c1717c7792ae80962ff5f349ae SHA-1: 7e61cfb79e9648e628ec899c0626e81853e23f87 SHA-256: 6bd92157007d6d02980b5c4aea4ee989d28a992ee76b6e9d73198e4e2e367809
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains lures related to game hacks and free in-game currency, directing users to a malicious redirector URL. The presence of embedded URLs and the ML classifier's high confidence score indicate a malicious intent to redirect users to potentially harmful content. No scripts were extracted, but the document's structure and embedded links strongly suggest a phishing or scam attempt.

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/how-to-hack-roblox-retail-tycoon-game-hack In PDF document text
    • https://www.eisgroupme.com/uploaded_files/userfiles/files/is-roblox-free-on-pc_GM431946152.pdfIn PDF document text
    • https://www.eisgroupme.com/uploaded_files/userfiles/files/free-followers-on-tiktok_GM835599320.pdfIn PDF document text
    • https://www.eisgroupme.com/uploaded_files/userfiles/files/ultimate-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://www.eisgroupme.com/uploaded_files/userfiles/files/robux-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • https://www.eisgroupme.com/uploaded_files/userfiles/files/play-roblox-for-free-on-google_GM431946152.pdfIn PDF document text
    • https://www.eisgroupme.com/uploaded_files/userfiles/files/bloxpink-free-robux_GM431946152.pdfIn PDF document text
    • https://www.eisgroupme.com/uploaded_files/userfiles/files/robux-earning-sites_GM431946152.pdfIn PDF document text
    • https://www.eisgroupme.com/uploaded_files/userfiles/files/free-robux-easy-2021-pastebin_GM431946152.pdfIn PDF document text
    • https://www.eisgroupme.com/uploaded_files/userfiles/files/roblox-rape-hack_GM431946152.pdfIn PDF document text
    • https://www.eisgroupme.com/uploaded_files/userfiles/files/coin-master-hack-software-download_GM406889139.pdfIn PDF document text
    • https://www.eisgroupme.com/uploaded_files/userfiles/files/apps-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • https://www.eisgroupme.com/uploaded_files/userfiles/files/free-roblox-groups_GM431946152.pdfIn PDF document text
    • https://www.eisgroupme.com/uploaded_files/userfiles/files/coin-master-level-4_GM406889139.pdfIn PDF document text
    • https://www.eisgroupme.com/uploaded_files/userfiles/files/roblox-army-robux_GM431946152.pdfIn PDF document text
    • https://www.eisgroupme.com/uploaded_files/userfiles/files/rbxfree-com-free-robux_GM431946152.pdfIn PDF document text
    • https://www.eisgroupme.com/uploaded_files/userfiles/files/how-do-u-hack-roblox_GM431946152.pdfIn PDF document text
    • https://www.eisgroupme.com/uploaded_files/userfiles/files/free-tiktok-fans-quick-and-easy_GM835599320.pdfIn PDF document text
    • https://www.eisgroupme.com/uploaded_files/userfiles/files/cm-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • https://www.eisgroupme.com/uploaded_files/userfiles/files/free-robux-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • https://www.eisgroupme.com/uploaded_files/userfiles/files/free-robux-no-verification-no-download-2021_GM431946152.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_off00003004.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3004 22792 bytes
SHA-256: ad5d71b191686da8ca9ba4a75979611f7d22297f7fb735e9d8df9f1e4dccedc0
font_01_sfnt_off0000632c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x632C 19224 bytes
SHA-256: 5f6e15b9ef57cccde2880569b0ad860dbe1fb63e74a22880498ce9da5e553f9d

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