Malicious PDF — malware analysis report

Static analysis result for SHA-256 20ddcc14505e0c98…

MALICIOUS

PDF

34.7 KB Created: 2021-06-28 02:23:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-23
MD5: f6d2bce3b4813ece65fac2cc5929f4f9 SHA-1: 6cd522765bc94ce6537f9aff25ae42c24dc4e674 SHA-256: 20ddcc14505e0c982320b000ed7d70c8bc0e79aadcd3fe81fe1ee95b9503f3f5
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document is designed to lure users into clicking links that promise free game hacks and currency. It contains numerous links to external PDFs and a primary redirector URL, indicating a link farm and potential malware distribution or phishing campaign. The document's structure and embedded links strongly suggest it is part of a malicious social engineering effort, likely delivered as a spearphishing attachment.

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/synapse-roblox-free-download-2021-game-hack In PDF document text
    • https://pn-tapaktuan.go.id/pustaka/repository/free-minecraft-java-edition-codes_GM479516143.pdfIn PDF document text
    • https://pn-tapaktuan.go.id/pustaka/repository/free-roblox-accounts-with-robux-that-work-2021_GM431946152.pdfIn PDF document text
    • https://pn-tapaktuan.go.id/pustaka/repository/roblox-flee-the-facility-computers-cheat_GM431946152.pdfIn PDF document text
    • https://pn-tapaktuan.go.id/pustaka/repository/blogspot-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://pn-tapaktuan.go.id/pustaka/repository/how-to-hack-roblox-accounts-passwords_GM431946152.pdfIn PDF document text
    • https://pn-tapaktuan.go.id/pustaka/repository/how-to-get-roblox-premium-for-free-2021_GM431946152.pdfIn PDF document text
    • https://pn-tapaktuan.go.id/pustaka/repository/free-robux-promo-codes-2021_GM431946152.pdfIn PDF document text
    • https://pn-tapaktuan.go.id/pustaka/repository/fly-gamepass-for-free-on-roblox_GM431946152.pdfIn PDF document text
    • https://pn-tapaktuan.go.id/pustaka/repository/how-to-get-animations-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • https://pn-tapaktuan.go.id/pustaka/repository/wahoo-free-roblox_GM431946152.pdfIn PDF document text
    • https://pn-tapaktuan.go.id/pustaka/repository/coin-master-apk-hack_GM406889139.pdfIn PDF document text
    • https://pn-tapaktuan.go.id/pustaka/repository/freespinandcoinblogspotcom-2021-11-coinmasterfreespinandcoinlinkshtml_GM406889139.pdfIn PDF document text
    • https://pn-tapaktuan.go.id/pustaka/repository/free-coins-coin-master-ios_GM406889139.pdfIn PDF document text
    • https://pn-tapaktuan.go.id/pustaka/repository/roblox-army-free-robux_GM431946152.pdfIn PDF document text
    • https://pn-tapaktuan.go.id/pustaka/repository/how-to-hack-roblox-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://pn-tapaktuan.go.id/pustaka/repository/how-to-become-a-vip-in-roblox-for-free_GM431946152.pdfIn PDF document text
    • https://pn-tapaktuan.go.id/pustaka/repository/how-to-get-minecraft-bedrock-edition-for-free_GM479516143.pdfIn PDF document text
    • https://pn-tapaktuan.go.id/pustaka/repository/how-to-downl-oad-wwall-hacks-on-roblox_GM431946152.pdfIn PDF document text
    • https://pn-tapaktuan.go.id/pustaka/repository/roblox-hack-me-robux_GM431946152.pdfIn PDF document text
    • https://pn-tapaktuan.go.id/pustaka/repository/how-to-hack-in-roblox-dragon-ball-rage_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_off0000306a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x306A 21620 bytes
SHA-256: b7fe6f1ca6a8d6d37890c857b4e84710a8525923da2462117f4f7ed6f7e10d0e
font_01_sfnt_off00005f9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F9C 19916 bytes
SHA-256: bd3bf0c1b174295c393b4c8b45b620546f0550faef6ffcebf0243802d03a9434

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