Malicious PDF — malware analysis report

Static analysis result for SHA-256 75dd58becf0834f6…

MALICIOUS

PDF

85.4 KB Created: 2021-03-17 20:13:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7c51306d4d89f62408f5e574fccc852b SHA-1: 72d7f97bd018ef61b4cdc75002a101af06d138fe SHA-256: 75dd58becf0834f649ebf6e2727e7a4555270bffcc159338af1e860776d7bd50
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to Weebly and S3-hosted PDFs, indicative of a link farm or phishing campaign. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with techniques used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://lozipotod.ru/123?utm_term=english+dialogue+worksheets+pdf
    • https://sijezivupo.weebly.com/uploads/1/3/1/4/131408567/3396c.pdf
    • https://biwezufum.weebly.com/uploads/1/3/4/8/134872286/5485372.pdf
    • https://nuzunovi.weebly.com/uploads/1/3/5/3/135314570/notijikab.pdf
    • http://tehnikator.ru/dressy_rompers_and_jumpsuits_canadalot9y.pdf
    • https://nojabepeteguki.weebly.com/uploads/1/3/4/6/134669956/be223a2bed5f.pdf
    • https://kelezisexuva.weebly.com/uploads/1/3/0/7/130739204/1283045.pdf
    • http://lnstagram-helping-centre.com/645610893341qoho.pdf
    • https://mimejomukokije.weebly.com/uploads/1/3/4/5/134510045/7715271.pdf
    • https://jazelisis.weebly.com/uploads/1/3/4/8/134870131/fowesinoluwaz_bulesaludipo_wefunelamujesu.pdf
    • https://xexidizufom.weebly.com/uploads/1/3/4/5/134508107/viwudoxatirarepefig.pdf
    • https://buzuravuk.weebly.com/uploads/1/3/6/0/136097113/nufeluz.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/4c346b44-71f3-4273-ba79-d880e0b947d5/a_kilocalorie_is_a_unit_of_heat_energy.pdf
    • https://s3.amazonaws.com/dudujopixejikug/cheap_formal_dresses_under_30.pdf
    • https://s3.amazonaws.com/likerajatob/gokapa.pdf
    • https://s3.amazonaws.com/fakuguvil/87985437413.pdf
    • https://uploads.strikinglycdn.com/files/96259402-a8e8-4ac5-89da-14beab2e439d/memolovupiretekub.pdf
    • https://s3.amazonaws.com/dowesitobuga/polycom_soundstation2_ex_conference_phone_with_caller_id.pdf
    • https://uploads.strikinglycdn.com/files/6ddbe911-c0ce-4d37-a1b9-fd14d5cb779f/zazodoxixujimepofakoguv.pdf
    • https://s3.amazonaws.com/zaxuledo/74363824936.pdf
    • https://uploads.strikinglycdn.com/files/5bd3ea4e-205a-4bcc-8537-4d1cb4df1cb4/ensayo_sobre_el_mundo_de_sofa_pelcula.pdf
    • https://uploads.strikinglycdn.com/files/aa1095db-c863-4310-87f4-c324ca26b55b/homelite_2700_psi_pressure_washer_honda_engine.pdf
    • https://uploads.strikinglycdn.com/files/ef6081e3-46ea-4bc8-8432-bd943032c695/the_surrender_experiment_google_books.pdf
    • https://uploads.strikinglycdn.com/files/158cffa6-6b62-443b-b202-5e35a6eb392d/3084741254.pdf
    • https://uploads.strikinglycdn.com/files/c2bb0137-fc8a-4003-a9bf-52e5b75e9527/7779992361.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000110d9.bin
2e4189fe6850926e6616f89a0eaf000a307dbd1d0bb912ac883beb36e61ee3ab		 pdf-font-stream PDF embedded font (sfnt) at offset 0x110D9 5416 bytes
font_01_sfnt_off00012356.bin
0655619a779c56eb4e8085e866a838673e63ea19335ad642d881eaf6804bc25e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12356 10624 bytes

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