Malicious PDF — malware analysis report

Static analysis result for SHA-256 014abdb2ae0c820f…

MALICIOUS

PDF

33.6 KB Created: 2021-06-28 15:53:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 0e7435ca9387585dd0a9e202838e66bd SHA-1: 3ff397ee8d75c0ab9ee05f6ffbdafb3e3fa359ed SHA-256: 014abdb2ae0c820f18ecd0c47b7f071b233e37e28643a04d7bc9d3256dabec21
142 Risk Score

Malware Insights

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

The PDF contains numerous links to external sites, many of which are SEO-optimized lures for game hacks and cheats. The ML classifier strongly indicated maliciousness, and the presence of a download button lure reinforces the deceptive nature of the document. The primary goal appears to be redirecting users to potentially malicious websites that may host malware or phishing content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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.
  • PDF links to a 'free generator / game hack' redirector high 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.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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/479516143/minecraft-launcher-free-game-hack PDF link annotation
    • http://foo.com.tw/files/free-coins-coin-master-link_GM406889139.pdfIn PDF document text
    • http://foo.com.tw/files/coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
    • http://foo.com.tw/files/alpha-hack-roblox_GM431946152.pdfIn PDF document text
    • http://foo.com.tw/files/how-to-get-free-roblox-items-using-coding_GM431946152.pdfIn PDF document text
    • http://foo.com.tw/files/coin-master-cheat-apk-free-download_GM406889139.pdfIn PDF document text
    • http://foo.com.tw/files/coin-master-free-spin-codes_GM406889139.pdfIn PDF document text
    • http://foo.com.tw/files/coin-master-hack-app-download-free_GM406889139.pdfIn PDF document text
    • http://foo.com.tw/files/rbx-gg-free-robux_GM431946152.pdfIn PDF document text
    • http://foo.com.tw/files/roblox-sign-in-free_GM431946152.pdfIn PDF document text
    • http://foo.com.tw/files/coin-master-free-soins_GM406889139.pdfIn PDF document text
    • http://foo.com.tw/files/how-can-u-get-free-robux_GM431946152.pdfIn PDF document text
    • http://foo.com.tw/files/roblox-build-a-boat-hack-script_GM431946152.pdfIn PDF document text
    • http://foo.com.tw/files/earnrobux-gg-earn-free-robux-for-roblox_GM431946152.pdfIn PDF document text
    • http://foo.com.tw/files/roblox-18_GM431946152.pdfIn PDF document text
    • http://foo.com.tw/files/how-do-i-hack-someones-roblox-account_GM431946152.pdfIn PDF document text
    • http://foo.com.tw/files/hack-roblox-game_GM431946152.pdfIn PDF document text
    • http://foo.com.tw/files/free-robux-come_GM431946152.pdfIn PDF document text
    • http://foo.com.tw/files/hpw-tp-change-your-name-in-roblox-for-free-2021_GM431946152.pdfIn PDF document text
    • http://foo.com.tw/files/how-to-get-free-robux-without-doing-anything-2021_GM431946152.pdfIn PDF document text
    • http://foo.com.tw/files/roblox-games-money-hack_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002f19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F19 22544 bytes
SHA-256: 3f0ba772aa9c141f4143b4864ffaa5a94e1a12138d661fb4ed20ed14588b809b
font_01_sfnt_off0000613b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x613B 18164 bytes
SHA-256: 6217c2688e2cdd9b922ed2b0e9f3b2fc7a8795a9dac31b3127849cac571971e9

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