Malicious PDF — malware analysis report

Static analysis result for SHA-256 05ce12a6549f3c5f…

MALICIOUS

PDF

74.1 KB Created: 2021-03-21 11:37:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 225b9dac56482fef0ef879fda15ef266 SHA-1: 54f7431d4f897a41b43da13ad8fbea669d1912c6 SHA-256: 05ce12a6549f3c5f7f4198c583132a7e1f3e445fdae6c03404f436fd763a6338
156 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, identified as a link farm, suggesting a malicious intent to redirect users. The ClamAV detection and ML classifier strongly indicate this is a phishing or malicious document. While no scripts were explicitly extracted, the PDF structure and heuristics point towards techniques used to deliver malicious content or redirect users to phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://golowaki.ru/wix?keyword=american+softball+association+slowpitch+rules
    • http://xegazinijitup.mywebcommunity.org/63741574720.pdf
    • https://mumizovis.weebly.com/uploads/1/3/4/3/134350635/davadafolo.pdf
    • http://desajegurake.scienceontheweb.net/lezut.pdf
    • https://kulojimafad.weebly.com/uploads/1/3/4/5/134518235/d89f3a0180.pdf
    • https://lalusaguru.weebly.com/uploads/1/3/4/6/134611329/xoruvutawo.pdf
    • http://zusagukitu.mywebcommunity.org/29883899464.pdf
    • https://cdn.sqhk.co/zidulibu/5gfihha/75404948333.pdf
    • https://cdn.sqhk.co/naziwixolagu/hhcbNhe/pupps_rash_pregnancy.pdf
    • http://lejunuzegakikuv.mypressonline.com/back_stretches_spanish.pdf
    • https://cdn.sqhk.co/dagozuwemep/iaujjaS/81419111666.pdf
    • https://cdn.sqhk.co/fujesepulo/d2chhjd/line_driver_ad.pdf
    • https://cdn.sqhk.co/gisepavuv/uKZgeiT/happy_room_log_pc.pdf
    • https://renudufodajofi.weebly.com/uploads/1/3/4/8/134884992/ae1b390c2.pdf
    • https://cdn.sqhk.co/purorelaz/ZNja5hg/overkill_3_mod_apk_1._4._5.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://lufevexos.atwebpages.com/marksheet_format_download.pdf
    • http://bajekixizosi.myartsonline.com/sobotta_anatomy_atlas_download.pdf
    • https://d89a15f7-21b5-45f0-b9b4-bc5b7be68842.filesusr.com/ugd/18e821_7309713cfbfc44e584cfc37c061365d1.pdf?index=true
    • https://254b3b0b-79dc-4992-827c-fd4bb3db3178.filesusr.com/ugd/f515ca_79cbe463ea5f40b591327e86c549d804.pdf?index=true
    • http://xijewixevav.onlinewebshop.net/tovojigajalu.pdf
    • https://33edd578-4186-4695-89f3-f56a5a23fc53.filesusr.com/ugd/f17c08_72eac61cc7cd4f75b9426f4c1f345b51.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_off0000e413.bin
b018a17b5145ce13a9dffd133d5afd3cfaf4da62c7f9103ecc50740f701befa9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE413 5476 bytes
font_01_sfnt_off0000f694.bin
0472696867cc65d41d2d35bb614358dccda4c840a82d480bab4ef380d8ab1bf4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF694 10068 bytes

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