Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f844f7048237234…

MALICIOUS

PDF

70.7 KB Created: 2021-02-15 13:50:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: d815baae7ea24257f2ee8f5cf22702d7 SHA-1: 0eb94e6f83743d1e8b4a6baa108cdcd15a6ba081 SHA-256: 5f844f70482372340a352f51de43c72493414843ab6097e1604820edd08a1fb9
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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.
  • 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://yafferge.ru/wix?keyword=literacy+behind+bars+summary In PDF document text
    • https://junurewumopu.weebly.com/uploads/1/3/2/7/132740614/zokorekatikit.pdfIn PDF document text
    • https://sajolunuweto.weebly.com/uploads/1/3/1/4/131407571/joseso_gipapa.pdfIn PDF document text
    • https://mudagetani.weebly.com/uploads/1/3/4/3/134381332/70630.pdfIn PDF document text
    • http://sun-italy.space/legedowasibenokizafarsxhrd.pdfIn PDF document text
    • http://nnorm-id.com/create_outlook_email_template_with_subjectpnk4i.pdfIn PDF document text
    • http://murunabo.iblogger.org/puduxurexo.pdfIn PDF document text
    • https://rixijufufapug.weebly.com/uploads/1/3/4/4/134497528/jikot_pakepamiwevuv.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://livufuxe.epizy.com/cfdi_version_3._3_ejemplo.pdfIn PDF document text
    • https://s3.amazonaws.com/matogapibelifiv/64972520048.pdfIn PDF document text
    • https://s3.amazonaws.com/lomuper/28701646426.pdfIn PDF document text
    • http://vozekalazasof.rf.gd/32885211673.pdfIn PDF document text
    • http://tenefotozefuzuw.rf.gd/property_inspection_report_template_uk.pdfIn PDF document text
    • http://letozin.rf.gd/32484686183.pdfIn PDF document text
    • http://gekavitominugi.epizy.com/tixuwiwoxubisifedewonumu.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_off0000d8ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8EF 5328 bytes
SHA-256: c90cf2e51bc8ff0ea2590ab9ed53b2db38eb7ce0ed8c4da22ce25ef06b1de904
font_01_sfnt_off0000eae3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAE3 10212 bytes
SHA-256: 472817f18d68f3ec98b323fdbe7c96ca875194618cc02217f1a189f4db8be03e