Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef95630eb0dc64da…

MALICIOUS

PDF

35.0 KB Created: 2021-06-27 05:20:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: b189ee41afed55efd630f2c030e833cd SHA-1: a73db78bcedf1790e4c49d9b4f05a988a7b114e7 SHA-256: ef95630eb0dc64dacf7bc399fb50dee3cd19e908554c178f5b990525961d1d97
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, disguised as game hacks and free generators. The primary lure directs users to 'netcdn.co', which is flagged as malicious infrastructure. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a phishing or malware distribution attempt, likely initiated via spearphishing.

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/black-wings-roblox-free-game-hack In PDF document text
    • https://privatearrangements.co.nz/public/files/static-moonactive-net-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://privatearrangements.co.nz/public/files/coin-master-hacks-free-spins_GM406889139.pdfIn PDF document text
    • https://privatearrangements.co.nz/public/files/coin-master-hack-2021-app-download_GM406889139.pdfIn PDF document text
    • https://privatearrangements.co.nz/public/files/minecraft-115-2-hacks_GM479516143.pdfIn PDF document text
    • https://privatearrangements.co.nz/public/files/mod-menu-roblox-no-crashing-free_GM431946152.pdfIn PDF document text
    • https://privatearrangements.co.nz/public/files/roblox-sir-robux-hack_GM431946152.pdfIn PDF document text
    • https://privatearrangements.co.nz/public/files/free-robux-app-code_GM431946152.pdfIn PDF document text
    • https://privatearrangements.co.nz/public/files/how-to-hack-roblox_GM431946152.pdfIn PDF document text
    • https://privatearrangements.co.nz/public/files/how-to-get-free-skins-in-minecraft_GM479516143.pdfIn PDF document text
    • https://privatearrangements.co.nz/public/files/coin-master-daily-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • https://privatearrangements.co.nz/public/files/free-minecraft-bedrock-server-hosting_GM479516143.pdfIn PDF document text
    • https://privatearrangements.co.nz/public/files/make-free-robux_GM431946152.pdfIn PDF document text
    • https://privatearrangements.co.nz/public/files/free-robux-please_GM431946152.pdfIn PDF document text
    • https://privatearrangements.co.nz/public/files/roblox-free-robux-generator_GM431946152.pdfIn PDF document text
    • https://privatearrangements.co.nz/public/files/robux-generator-2021_GM431946152.pdfIn PDF document text
    • https://privatearrangements.co.nz/public/files/free-face-roblox_GM431946152.pdfIn PDF document text
    • https://privatearrangements.co.nz/public/files/cool-free-halloween-costumes-roblox_GM431946152.pdfIn PDF document text
    • https://privatearrangements.co.nz/public/files/free-coins-coin-master-iphone_GM406889139.pdfIn PDF document text
    • https://privatearrangements.co.nz/public/files/how-to-get-more-spins-on-coin-master-for-free_GM406889139.pdfIn PDF document text
    • https://privatearrangements.co.nz/public/files/spin-links-for-coin-master_GM406889139.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_off0000311d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x311D 22560 bytes
SHA-256: a42426042e8d6c035430895bc2fa93904a70897745b84cc2efff17f3d2828ec7
font_01_sfnt_off00006368.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6368 19136 bytes
SHA-256: ae489e1134361e6616e128259df87e060f7fea2928a83e2f0d3c8132932878f6

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