Malicious PDF — malware analysis report

Static analysis result for SHA-256 8fed6e61d78c1f69…

MALICIOUS

PDF

83.9 KB Created: 2021-03-18 14:44:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 45d85d58938f807412f286ead9ab439e SHA-1: b5fca30e4352e00cebf0064af71705ddae5f9f68 SHA-256: 8fed6e61d78c1f69c83a012c9e37f9d439f40a59c0441e588b292690109e774a
126 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that redirects to a suspicious domain, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URI heuristic point towards a lure to a malicious site.

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 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://zajinet.ru/strik?utm_term=craftsman+3+1%252F2+hp+25+gal+air+compressor PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4447630/normal_5ff695e6271fa.pdfIn PDF document text
    • http://biggymstoe.com/rezutufubinilo6m0d3.pdfIn PDF document text
    • http://euroshopmn.space/how_to_do_high_intensity_interval_training_on_a_treadmillxhnki.pdfIn PDF document text
    • http://copyrightsupport-ig.com/rolajuhit6q.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458161/normal_6036cdf9bebc1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407314/normal_60081866b0ed7.pdfIn PDF document text
    • http://libralab.digital/zirajojemotidimucb3os.pdfIn PDF document text
    • http://shtampshop.ru/how_do_i_activate_my_proform_treadmill_without_ifitp7f1y.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/11af97e4-b250-4a40-ba5d-c2d6a8ba4e89/7177655573.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f094f770-e8c0-496e-a675-52a0b5758996/20975019015.pdfIn PDF document text
    • https://s3.amazonaws.com/rivazixexuguri/dietary_guidelines_2015.pdfIn PDF document text
    • https://s3.amazonaws.com/fexuror/6304746659.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxenipup/tisiperabesamufinilej.pdfIn PDF document text
    • https://s3.amazonaws.com/nitidadufetenu/phpspreadsheet_instead_of_save.pdfIn PDF document text
    • https://s3.amazonaws.com/fedojigudaj/apex_code_developer_s_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/19ec66c3-8252-4fb5-9f56-86a3a4377ecc/vox_ac15_channel_footswitch.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2d3a4fd8-b1bc-483f-8c16-0570e265891d/pijobodazamaxi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/10a39fea-e49b-4551-b977-2e9b232dff3c/how_do_you_fix_a_craftsman_lawn_mower_that_wont_start.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2ad488c3-a2a7-4d83-aca9-eb58b829e067/zuvumuvexumisajijiwexajed.pdfIn PDF document text
    • https://s3.amazonaws.com/fikuvine/how_to_troubleshoot_a_modem.pdfIn PDF document text
    • https://s3.amazonaws.com/zaxawetawupo/gelikopabutoweweguvufi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b3ea5b0a-7ed9-4432-af67-de2651e8a37f/what_is_the_meaning_of_business_press.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/703e15c8-91e2-4cad-be0b-d791cb65559b/bojalomatubaxemegoge.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9fbe224d-7bc8-494c-b37d-85bc36401494/24955946334.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_off000108d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108D2 5844 bytes
SHA-256: 7dd061c4e35fef8da6a86bd043da2dadddfc12904562ac6703905f4ad4e424a0
font_01_sfnt_off00011c9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C9C 11384 bytes
SHA-256: 285c638969faa6fcb6cca7dc9ecaeba0501f54d6c5997ac1d6af82d783bcc32c