Malicious PDF — malware analysis report

Static analysis result for SHA-256 574b07adcfdd1756…

MALICIOUS

PDF

79.1 KB Created: 2021-04-03 08:04:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 052d6e264db7dfc358169c8366721ea5 SHA-1: 680b35ace32651d0662f7ed60e2ec1d0cf1d0844 SHA-256: 574b07adcfdd17561dfea4e8379f5fb2845b19b4d860ab2cb7b1ae50bcb31ab3
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many pointing to disposable domains and potentially malicious content, as indicated by the 'PDF_SEO_LINK_FARM' and 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristics. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. The embedded URLs and the document's structure suggest it's designed to redirect users to other sites, potentially for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://jumiwimov.ru/wix?keyword=skyrim+ahzidal%2527s+armor+build PDF link annotation
    • http://vabetovopux.66ghz.com/dojuvesonuwo.pdfIn PDF document text
    • https://cdn.sqhk.co/xetasenuwoji/iezDqZg/voxuvew.pdfIn PDF document text
    • https://cdn.sqhk.co/lazujanaziri/Jifhafx/76892531059.pdfIn PDF document text
    • https://cdn.sqhk.co/rusobotakox/cAhbjbz/are_outdoor_basketball_courts_open_in_nc.pdfIn PDF document text
    • http://vigazorafoli.iblogger.org/siliwowugidowa.pdfIn PDF document text
    • https://cdn.sqhk.co/mugukawi/YjiJljb/guzapiloxapomesapaxi.pdfIn PDF document text
    • https://cdn.sqhk.co/pazakazagoz/iihiihc/when_to_plant_venus_fly_trap_seeds_uk.pdfIn PDF document text
    • https://cdn.sqhk.co/vovoritufi/jiaUUt0/ftdi_usb_to_serial_pinout.pdfIn PDF document text
    • https://cdn.sqhk.co/rigepasemapa/h8VsShg/lejam.pdfIn PDF document text
    • http://naturfresh.fun/69947884310d5s2g.pdfIn PDF document text
    • http://pexiwaz.iblogger.org/adjectives_key_stage_2_worksheets.pdfIn PDF document text
    • https://mipedurekarano.weebly.com/uploads/1/3/5/3/135321071/cfee0f.pdfIn PDF document text
    • https://womogidukiwu.weebly.com/uploads/1/3/4/8/134873304/pifewidusaka.pdfIn PDF document text
    • http://help-lnstagram-verifycopyrgiht.com/60126065245d898v.pdfIn PDF document text
    • http://bafazoxukiwux.iblogger.org/autocad_estudante_2017.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dupavumomupu.epizy.com/62565819906.pdfIn PDF document text
    • http://gojuveri.rf.gd/cheat_engine_without_virus.pdfIn PDF document text
    • http://bafopivazizaxon.rf.gd/cite_in_latex.pdfIn PDF document text
    • http://sefamuw.rf.gd/wuxutazedu.pdfIn PDF document text
    • http://finuzajobozosom.epizy.com/28433811019.pdfIn PDF document text
    • http://gujilozep.epizy.com/malayalam_bible_study_notes.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_off0000f38d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF38D 5560 bytes
SHA-256: 02988e67b381f1d799e3527c777319450f0c8fa758235142d06d12be6780a6c8
font_01_sfnt_off0001065d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1065D 12608 bytes
SHA-256: 0d8ea0813a2cea5b112ca975519352a5260acb683ccedfd4feb84d03e82297e0

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