Malicious PDF — malware analysis report

Static analysis result for SHA-256 03806e249d86688f…

MALICIOUS

PDF

78.1 KB Created: 2021-05-16 11:25:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 6b5e07151acd353d316c636143636d05 SHA-1: 4a82819a8f8effe2d5bba944f3e881b642e6fc35 SHA-256: 03806e249d86688fcdc19c09525bc6b5f8f50af7fd92a38f4b33980d7ace0cc9
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which are to domains associated with link farms and SEO spam. The ClamAV detection and ML classifier strongly indicate maliciousness, specifically related to phishing. The embedded URLs suggest an attempt to redirect users to potentially malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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
  • 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.
  • 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://zajinet.ru/strik?utm_term=clinical+microbiology+made+ridiculously+simple+edition+7+pdf+download PDF link annotation
    • http://tijudozi.scienceontheweb.net/pdf_to_word_ocr_offline.pdfIn PDF document text
    • https://kukurako.weebly.com/uploads/1/3/5/3/135321284/2248654.pdfIn PDF document text
    • https://dasubafetimediz.weebly.com/uploads/1/3/4/6/134673415/tulutexepifimuj-nojujowuke.pdfIn PDF document text
    • http://rexevivejegox.scienceontheweb.net/little_fires_everywhere_season_1_episode_4_recap.pdfIn PDF document text
    • https://bejokuwawij.weebly.com/uploads/1/3/4/6/134688199/vimurunubumujab-kapibasazekobo-wirololaw.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470533/normal_5fcd1600201c2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482413/normal_605a0699ac811.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369330/normal_6021407221148.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/c624ebff-fd34-4abb-9f0e-00f684c4b089/data_science_unsw_handbook_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/donarepemi/77202073055.pdfIn PDF document text
    • https://s3.amazonaws.com/palikuvexake/10_causes_of_poverty.pdfIn PDF document text
    • https://s3.amazonaws.com/dinisemowoge/4088240857.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3a28adcf-b3d6-4475-a30c-e356f8af9eca/zuvedepunumut.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/985ab03c-93e5-443c-85d0-2116b9c6028c/what_are_the_differences_between_a_virus_and_bacteria.pdfIn PDF document text
    • https://s3.amazonaws.com/xetasif/47742043294.pdfIn PDF document text
    • http://wufagezigedo.onlinewebshop.net/biodiversity_conservation_textbook.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d027d32e-95a9-480f-91b1-10d49680aaff/11624863370.pdfIn PDF document text
    • https://s3.amazonaws.com/gewisetug/twitch_email_address_format.pdfIn PDF document text
    • https://s3.amazonaws.com/pukaridimupo/puxoretalirigajalasowi.pdfIn PDF document text
    • https://s3.amazonaws.com/dexodekelaseki/ps4_eject_screw_tighten.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fe9496d7-72c6-4949-9c66-854fd3ef0d4a/2008_dodge_avenger_starter_relay_diagram.pdfIn PDF document text
    • https://s3.amazonaws.com/radubozufiwo/gigan.pdfIn PDF document text
    • https://s3.amazonaws.com/jewizopukuni/wizomufosogusugabosevep.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_off0000f13f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF13F 5792 bytes
SHA-256: 511c9c2d035e061845917e697a3b4d1160011982dc8a1d09fd9a34ffa52f4167
font_01_sfnt_off000104f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104F8 11036 bytes
SHA-256: 2e91a36f832ef82c149b8d1231074ad4180010c511a280a84fcba4fc68cfa127

Open this report in the interactive analyzer, or submit your own file for analysis.