Malicious PDF — malware analysis report

Static analysis result for SHA-256 eaf29d35c6977353…

MALICIOUS

PDF

73.8 KB Created: 2021-03-28 22:29:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 187f7f38a9405bb583909943a54e1683 SHA-1: ecfd0d05f0fac0a4db56aecbe02a87e8195c4a47 SHA-256: eaf29d35c697735393ad0e971722fbd7dc5791ce1901b4367b7f485faad82958
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains a large number of external links, identified as a link farm. Several of these links point to domains with unknown reputations, suggesting a potential phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://xezojetit.ru/award?keyword=how+to+make+a+book+into+a+pdf+file PDF link annotation
    • http://xafopawiki.medianewsonline.com/whats_the_job_description_of_a_office_manager.pdfIn PDF document text
    • https://devubavoxonor.weebly.com/uploads/1/3/2/7/132741482/magekoxuk_vuvozupala.pdfIn PDF document text
    • https://gagezomelebagam.weebly.com/uploads/1/3/1/6/131606069/5afdc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413975/normal_60437fbced624.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501659/normal_6017cd1653127.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411919/normal_602454b6b8d46.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/12de3729-3231-441e-832f-1af0ee1ecaac/63212371947.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/981cc6da-8e4a-4a02-96f9-e5b5896955e8/the_second_great_awakening_was_similar_to_jacksonian_democracy_in_that.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c047d09-d832-4dfd-85e6-27d920194e19/what_do_you_call_your_daughter_in_law_in_spanish.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d325bb94-6732-432e-8d6c-b1fb4558d654/duguzafez.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/71085cfe-de89-4c83-9599-3f002fd5677d/les_miserables_soundtrack_download_mega.pdfIn PDF document text
    • http://pusapovewazigu.onlinewebshop.net/jeripeninumuvi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/316dbe67-e020-4e60-a272-55e4dbaab8c2/around_the_world_in_80_days_full_movie_in_english_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/749cccc2-6d28-4395-b412-cce744650e86/14522994855.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b8ec09cc-f1c7-4408-a98d-a473e59521bc/kingdom_principles_of_fatherhood_myles_munroe.pdfIn PDF document text
    • http://vebusatoro.atwebpages.com/14000874555.pdfIn PDF document text
    • http://sinusisokopex.atwebpages.com/nakojudewudujadilifok.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aef414a0-6a01-4b67-a151-7d1dffe33901/jobulumirebizidanudu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bd36330b-18e7-4ca2-aea3-3b42b9eaedaf/fipixemavibumojuvimo.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_off0000e34b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE34B 5168 bytes
SHA-256: 9c3b336199f69213371a97750ba27c23a26deb514c99e9b38beec2c892113edf
font_01_sfnt_off0000f4dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4DD 10928 bytes
SHA-256: 1a36f0b7d0524e29f021b6bb793706967594d9f4dec164429cb84eead2260e98