Malicious PDF — malware analysis report

Static analysis result for SHA-256 6546ef781ef1cc2e…

MALICIOUS

PDF

34.1 KB Created: 2021-06-26 03:46:16 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: b928833bed724f5120edaa7665766e95 SHA-1: 3f8fd6d35c9237eaa745cfa49526f52b3697ea30 SHA-256: 6546ef781ef1cc2ee0fee0bc9776593e065b9ffe8275e4ef48c8940fb82aea43
160 Risk Score

Malware Insights

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

This PDF document is designed to lure users into clicking links by promising free game-related items. The embedded links, such as 'http://netcdn.co/app/431946152/roblox-mods-for-free-game-hack', lead to known malicious redirectors. The document's structure and content suggest it's part of a phishing or scam campaign, likely exploiting user interest in popular games to drive traffic to malicious sites.

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/roblox-mods-for-free-game-hack In PDF document text
    • http://stiepariperpus.web.id/sarjana//repository/coin-master-daily-free-spins-link-today_GM406889139.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana/repository/roblox-group-free-robux_GM431946152.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana/repository/vortexx-free-robux_GM431946152.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana//repository/coin-master-hack-app-for-iphone_GM406889139.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana/repository/how-to-get-free-cards-for-coin-master_GM406889139.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana/repository/minecraft-free-online_GM479516143.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana//repository/free-robux-no-verification-required_GM431946152.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana/repository/how-to-hack-roblox-servers-2021_GM431946152.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana/repository/coin-master-hack-account_GM406889139.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana/repository/earn-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana//repository/minecraft-hacks-pc_GM479516143.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana//repository/coin-master-free-spins-daily-fb-champion_GM406889139.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana//repository/links-for-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana//repository/coin-master-20-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana//repository/legitimate-coin-master-free-spins-apk_GM406889139.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana//repository/easy-robux-generator_GM431946152.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana/repository/coin-master-hack-spins_GM406889139.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana/repository/free-roblox-codes-2021_GM431946152.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana//repository/unlimited-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana/repository/coin-master-free-spins-link-2021-no-verification-deutsch_GM406889139.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
stream_002_off00002f0f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2F0F 22192 bytes
SHA-256: 9daa8d740ceedbccf3be2177129fa237892a3d83e586f3933b703d101ba29410
font_01_sfnt_off00006074.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6074 19020 bytes
SHA-256: 3a9fd3470c0fc8b8a0464037414b1cd11bf43d1a4794ab0d3e23e5ca6369e3a9

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