Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc7a022328550c04…

MALICIOUS

PDF

81.5 KB Created: 2021-03-31 15:41:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 1772b75e0a037a95c62472d2ca587a5e SHA-1: ebec3146a07ce608c4f4fa7b9be3c41082206798 SHA-256: dc7a022328550c043774f3c020a05995cc5ce4f14f124f28ce4275bfb8e60d02
186 Risk Score

Malware Insights

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

This PDF file contains a large number of external links, many hosted on disposable domains, indicating a link farm or phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or SEO manipulation. While no scripts were directly extracted, the PDF structure and embedded URIs are indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://jumiwimov.ru/123?utm_term=platform+old+skool+black+vans PDF link annotation
    • https://safodejinuvi.weebly.com/uploads/1/3/4/7/134753113/gosusovelinilivotaz.pdfIn PDF document text
    • http://betmoy57.com/crochet_pattern_for_infinity_scarf_freeqn3qt.pdfIn PDF document text
    • http://stepka2016.xyz/reclamos_inmobiliaria_danacorpeoksi.pdfIn PDF document text
    • https://gevodudadulaso.weebly.com/uploads/1/3/5/3/135300067/9e5ff7.pdfIn PDF document text
    • https://pasorizafam.weebly.com/uploads/1/3/4/0/134096756/favogoki.pdfIn PDF document text
    • http://amandeepsadyora.com/how_to_use_a_cricut_expression_machinexo1bc.pdfIn PDF document text
    • http://complect-tech.ru/10740068360vtgtt.pdfIn PDF document text
    • https://petizigosi.weebly.com/uploads/1/3/4/9/134903326/madodijixupet_vuligabixunebi_zukexedido.pdfIn PDF document text
    • https://jafipununevov.weebly.com/uploads/1/3/0/8/130814040/7478215.pdfIn PDF document text
    • https://rupibofog.weebly.com/uploads/1/3/1/6/131607232/343dd0.pdfIn PDF document text
    • http://dalnoboyi.xyz/81143365478ihs3m.pdfIn PDF document text
    • http://topcreditcheck.info/libro_de_historia_5_grado_2020_contestado1s4mp.pdfIn PDF document text
    • http://datingdate.site/wunigolarekavumofimeka1on36.pdfIn PDF document text
    • http://apkweb.net/lich_king_shaman_hearthstoneifl9m.pdfIn PDF document text
    • http://bigswinner.space/seravhpt8h.pdfIn PDF document text
    • https://vawotitalu.weebly.com/uploads/1/3/2/7/132710714/nugudeverugorezateg.pdfIn PDF document text
    • http://familyit.info/percy_jackson_disney_plus_dreamcasts7opm.pdfIn PDF document text
    • http://site-shop.xyz/v_live_atlanta_georgiadx2gk.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://b0c090b1-cb02-46d8-8a69-3fb9d82636b6.filesusr.com/ugd/4dbf3f_d744ef3063dd466e87b4a505caf83df9.pdf?index=trueIn PDF document text
    • https://d6bf9bfb-c092-4b17-ab9f-91da83e6a9d2.filesusr.com/ugd/d7ad14_0efe5dd016a04eeea8ee878ac7fda644.pdf?index=trueIn PDF document text
    • https://a82c121c-2200-4cd7-aff6-47cf910fdadb.filesusr.com/ugd/117c17_90a409b2e6774a9586141ae4245206be.pdf?index=trueIn PDF document text
    • https://f64a1a0a-debf-4843-a838-a34c0cae0f4a.filesusr.com/ugd/89602e_1e175034e1d746abb874df50dcc27006.pdf?index=trueIn PDF document text
    • https://94ac7338-8c66-48ed-b7e4-01cccba3eff0.filesusr.com/ugd/9b8421_b4ccba8c446d4ba8aa2d7aad1e8120a2.pdf?index=trueIn 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f22b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF22B 5052 bytes
SHA-256: f7896ea79e3913975938e42d3b564e11801257f8d061454e8ad797f60f6eee3e
font_01_sfnt_off0001033d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1033D 13000 bytes
SHA-256: 1951724bc30972273b83cff65dc56cd3e5ce43d0e9266841ae18c6121cdac7a2
font_02_sfnt_off00012a49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A49 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e