Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c687ce9c6a6c234…

MALICIOUS

PDF

82.8 KB Created: 2021-03-16 17:51:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 7b287d1486a63df97345bec35d3c215a SHA-1: 58acc14d0ac0bfe154938b93288cb33671b4104b SHA-256: 8c687ce9c6a6c23401b929f160ab6aa8f6ef5ae128060e495d899f615b5c5b17
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious content. The primary URL, 'https://dugedepap.ru/strik?utm_term=how+to+unlock+moto+e6+bootloader', is presented as a lure. ClamAV and ML heuristics confirm the malicious nature of the PDF, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

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://dugedepap.ru/strik?utm_term=how+to+unlock+moto+e6+bootloader PDF link annotation
    • https://narodejezagog.weebly.com/uploads/1/3/3/9/133988416/4604792.pdfIn PDF document text
    • https://kuwomodelinero.weebly.com/uploads/1/3/0/7/130776449/2713481.pdfIn PDF document text
    • http://larebalin.mypressonline.com/puerto_rican_cookery_coquito.pdfIn PDF document text
    • https://vixififevi.weebly.com/uploads/1/3/5/3/135346472/putofivuba.pdfIn PDF document text
    • https://wozizagozesa.weebly.com/uploads/1/3/4/8/134848764/4b45ab.pdfIn PDF document text
    • https://jevixivuxed.weebly.com/uploads/1/3/4/6/134622771/fivosivovosejul_lalafofedejimok_rizimo_saneka.pdfIn PDF document text
    • https://zewemoledomuro.weebly.com/uploads/1/3/4/7/134746436/wegaxu_nifefizumekasi.pdfIn PDF document text
    • https://sufevibuxaka.weebly.com/uploads/1/3/2/7/132712301/mubabilusoli.pdfIn PDF document text
    • https://mobajexiv.weebly.com/uploads/1/3/4/4/134455683/nebuva.pdfIn PDF document text
    • http://gazopulodagifus.iblogger.org/41002664761.pdfIn PDF document text
    • https://dizakevusarebiz.weebly.com/uploads/1/3/4/5/134581037/5507323.pdfIn PDF document text
    • https://lepatoketi.weebly.com/uploads/1/3/4/7/134732542/6669099.pdfIn PDF document text
    • http://purubifo.medianewsonline.com/7581361726.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/mexesazaxasa/bumodugaximodezuxelek.pdfIn PDF document text
    • http://kakininutopojub.rf.gd/descargar_agenda_2020_gratis.pdfIn PDF document text
    • http://gazinopalevigem.rf.gd/brandi_carlile_the_story_song.pdfIn PDF document text
    • https://s3.amazonaws.com/jifedefujodu/96971256687.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4975f98e-3310-4c46-8bc0-bc392a686554/how_to_find_probability_in_statistics_statcrunch.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d5477c2e-da98-4b13-b9f8-f77f14c80a59/washington_football_team_helmet_for_sale.pdfIn PDF document text
    • https://s3.amazonaws.com/wesezuzuvalirik/59219407526.pdfIn PDF document text
    • https://s3.amazonaws.com/pezofut/endeavour_annual_report.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bd28d0f6-0b8d-4e9b-9bdb-d171fbf10728/powerful_prayer_sermon_outline.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e9d4973b-8717-48fd-b3b4-9414ed441aed/how_to_get_rid_of_dmso_smell.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8bcf0271-f21f-4f7b-929e-3c3db37bad18/harry_potter_1st_book_read_aloud.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ef3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF3E 5152 bytes
SHA-256: 6758e8f7e388f77596e6b15feff80d9fe817903695fc9ec0c5a002e5276dfc1f
font_01_sfnt_off000100af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100AF 1800 bytes
SHA-256: daad3f347a4f42f432ee9983e619a7c063e36761dba5934b469418034847e28e
font_02_sfnt_off0001093d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1093D 11204 bytes
SHA-256: af77359ad1e1b614706d623d8d69097e6ae13d513c16d013da76947858fe0837
font_03_sfnt_off00012f49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F49 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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