Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b69316ff776e099…

MALICIOUS

PDF

34.1 KB Created: 2021-07-01 15:30:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: be35219613b071d18b5467bd54252ebb SHA-1: c2b2ea33a0d13e5f8c7fc28aa6fde0d94f62fcba SHA-256: 3b69316ff776e099002639f1d7764072f5b8db538cc08a764aeee32bbf875598
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links, including one to a known malicious redirector, designed to lure users into clicking on promises of free game currency or hacks. The document body and heuristics indicate a phishing or scam attempt, likely leading to further malware or credential harvesting. No scripts were extracted, but the embedded URLs and the nature of the lures suggest a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/roblox-free-robux-game-hack In PDF document text
    • https://ghevanphongdep.vn/public/upload/files/roblox-cheat-engine-codes-2021_GM431946152.pdfIn PDF document text
    • https://ghevanphongdep.vn/public/upload/files/how-to-get-a-free-skin-noob-roblox_GM431946152.pdfIn PDF document text
    • https://ghevanphongdep.vn/public/upload/files/how-to-get-free-followers-on-roblox_GM431946152.pdfIn PDF document text
    • https://ghevanphongdep.vn/public/upload/files/get-free-stuff-on-roblox_GM431946152.pdfIn PDF document text
    • https://ghevanphongdep.vn/public/upload/files/coin-master-hack-without-human-verification_GM406889139.pdfIn PDF document text
    • https://ghevanphongdep.vn/public/upload/files/coin-master-free-coins-and-spins-daily_GM406889139.pdfIn PDF document text
    • https://ghevanphongdep.vn/public/upload/files/does-coin-master-hack-work_GM406889139.pdfIn PDF document text
    • https://ghevanphongdep.vn/public/upload/files/free-roblox-render_GM431946152.pdfIn PDF document text
    • https://ghevanphongdep.vn/public/upload/files/how-to-get-a-lot-of-robux_GM431946152.pdfIn PDF document text
    • https://ghevanphongdep.vn/public/upload/files/how-to-get-free-robux-doing-nothing-no-hacks_GM431946152.pdfIn PDF document text
    • https://ghevanphongdep.vn/public/upload/files/get-free-tiktok-fans_GM835599320.pdfIn PDF document text
    • https://ghevanphongdep.vn/public/upload/files/get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://ghevanphongdep.vn/public/upload/files/roblox-lumber-tycoon-2-hack-glitch_GM431946152.pdfIn PDF document text
    • https://ghevanphongdep.vn/public/upload/files/roblox-robux-hack-ad_GM431946152.pdfIn PDF document text
    • https://ghevanphongdep.vn/public/upload/files/can-u-get-free-robux_GM431946152.pdfIn PDF document text
    • https://ghevanphongdep.vn/public/upload/files/coin-master-free-spin-app-iphone_GM406889139.pdfIn PDF document text
    • https://ghevanphongdep.vn/public/upload/files/robux-hack-me_GM431946152.pdfIn PDF document text
    • https://ghevanphongdep.vn/public/upload/files/unlimited-robux-2021_GM431946152.pdfIn PDF document text
    • https://ghevanphongdep.vn/public/upload/files/hack-coin-master-android-game_GM406889139.pdfIn PDF document text
    • https://ghevanphongdep.vn/public/upload/files/free-robux-generator-free-download_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_off00002f63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F63 22304 bytes
SHA-256: 7516bd2a0e36f852debc1dbeccd6732b7de51c64edc4e14c8cd0c9d51790dc1b
font_01_sfnt_off00006121.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6121 18788 bytes
SHA-256: 240f26960413d3375b32b54d3a16c3eb3bd7324ec8649811f17e0fe1da2802cb

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