Malicious PDF — malware analysis report

Static analysis result for SHA-256 e89ad2dc255185e5…

MALICIOUS

PDF

77.7 KB Created: 2021-03-04 15:37:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8d13b8d2c7a229cda3e0921631f47809 SHA-1: 71e64e0f8c543e6f7d19f2b11f2141d4f6a4908f SHA-256: e89ad2dc255185e5a542e3e8d9211e2ccec20186eeeba9895a84ea525203f3e5
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was detected as malicious by ClamAV and ML classifiers, indicating a phishing or trojan threat. It contains a large number of external links, suggesting a link farm or a mechanism to host further malicious content. The presence of a 'download button' heuristic further supports a lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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 https://mezovuduw.ru/wix?keyword=holy+stone+drone+hs700+manual
    • https://cdn-cms.f-static.net/uploads/4475380/normal_5fe6648f25ab8.pdf
    • https://zasubimivari.weebly.com/uploads/1/3/1/3/131383839/2397341.pdf
    • https://cdn-cms.f-static.net/uploads/4425256/normal_60146597d587c.pdf
    • https://cdn-cms.f-static.net/uploads/4382953/normal_601b0cff3a030.pdf
    • https://cdn-cms.f-static.net/uploads/4471985/normal_60170aed7bd9d.pdf
    • https://dorulitonen.weebly.com/uploads/1/3/1/3/131380258/8139509.pdf
    • https://xibatelilon.weebly.com/uploads/1/3/1/6/131637149/601f0015962227f.pdf
    • https://lepamume.weebly.com/uploads/1/3/4/8/134882258/kunujezof-pofaxetupuk.pdf
    • https://cdn-cms.f-static.net/uploads/4407066/normal_6039fb850992b.pdf
    • https://rupasofo.weebly.com/uploads/1/3/4/8/134892789/manazen.pdf
    • https://static.s123-cdn-static.com/uploads/4365606/normal_6005b9e50ca49.pdf
    • https://cdn.sqhk.co/sajatanugeg/gdYNjjE/piruputakajirivurizep.pdf
    • https://cdn.sqhk.co/rekutadis/gjdvjid/zombie_3d_gun_shooter_mod_apk_home.pdf
    • https://cdn-cms.f-static.net/uploads/4384295/normal_601ba7db2ffb3.pdf
    • https://pidodogifir.weebly.com/uploads/1/3/1/3/131383649/8195095.pdf
    • https://cdn-cms.f-static.net/uploads/4384142/normal_5fd63a301139b.pdf
    • https://kosipomorogimel.weebly.com/uploads/1/3/4/3/134307263/soxilujezawe-tojagajewiridaz-gerukalo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://e0f910ba-f4aa-4d6b-87f6-24d78cda99ab.filesusr.com/ugd/cc15ef_ba06b71a739e4b47aed59a8f5582276d.pdf?index=true
    • https://3c3b7999-3797-4e53-a1d2-7989294d2e96.filesusr.com/ugd/cac9e4_5b966f45954e42b2a41841c46d1f7ff6.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e8dd.bin
6538a2caf1a53ef695f8d6d1694741740945d951d6454176d4717c8684088fcd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE8DD 5352 bytes
font_01_sfnt_off0000faea.bin
fe931dcd7dd6aaf7379437c61182d05f93263625ca9a4a60d844c4071eb7b1a5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFAEA 14888 bytes

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