Malicious PDF — malware analysis report

Static analysis result for SHA-256 e010195c7f7aa5b0…

MALICIOUS

PDF

91.2 KB Created: 2021-03-23 03:29:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 88a3261f0b51a18ad1d4c52698a86d88 SHA-1: 5151f836fe39a1cc4de2e011ff150e2ff4b8b1a4 SHA-256: e010195c7f7aa5b06049b78733b5247de91268add1f71074457ee1d9d6d3b90f
126 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://dugedepap.ru/strik?utm_term=new+moon+january+2021+est PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4416144/normal_6039b1b425415.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401515/normal_5fd271283ee9c.pdfIn PDF document text
    • http://wazepewazivulil.mywebcommunity.org/probability_tree_diagram_without_replacement.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369153/normal_6009f8e51bed9.pdfIn PDF document text
    • http://zewikeb.iblogger.org/teruzigivazuwakamewovele.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475406/normal_600ae43f92a9d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385204/normal_5ffe0e8e5de0b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484632/normal_604fc656b47b9.pdfIn PDF document text
    • http://gosetapuk.22web.org/vasexezobutakupufudawigul.pdfIn PDF document text
    • http://zikewexer.scienceontheweb.net/fitbit_charge_hard_reset.pdfIn PDF document text
    • http://xalebiru.iblogger.org/larej.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366399/normal_604d0a86601b1.pdfIn PDF document text
    • http://loxiwugukuna.iblogger.org/cable_selection.pdfIn PDF document text
    • http://dasezin.getenjoyment.net/52027269782.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393026/normal_60469b1fe669e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tokaverojov.epizy.com/17013276625.pdfIn PDF document text
    • http://maboruj.rf.gd/bd_cricket_team_pic.pdfIn PDF document text
    • http://wuxekijonudi.epizy.com/green_brook_nj_police_reports.pdfIn PDF document text
    • http://gazezubutajon.rf.gd/mbta_subway_map.pdfIn PDF document text
    • http://vewawisu.onlinewebshop.net/98610566133.pdfIn PDF document text
    • http://terumalok.atwebpages.com/smallest_reader_for_windows_7.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012608.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12608 5364 bytes
SHA-256: d4dbaacb789c06a739a972efe8ab57e948dd72b3c253394c8f2d3cf26f4df240
font_01_sfnt_off0001384c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1384C 11628 bytes
SHA-256: eaf5f7cd06ee751afd773a7b4af0ab5fcb69ff034679d3d02cdf92aa96fafe65