Malicious PDF — malware analysis report

Static analysis result for SHA-256 2bbb81eccf82ff27…

MALICIOUS

PDF

91.5 KB Created: 2021-03-08 17:05:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 2c9aca6552b002482f573992f5d94f82 SHA-1: bd26ede26579d14c8ea9899efd83ed6d9343c7b4 SHA-256: 2bbb81eccf82ff273a5adfc4a59cc0f9ceda1af9bfd5a3717d4544926a817f5a
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The PDF contains a large number of external links, many pointing to disposable domains, indicating a link farm designed to direct users to potentially malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware delivery. No scripts were extracted, but the primary attack vector appears to be user interaction with the embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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=green+marketing+thesis+pdf PDF link annotation
    • http://hookup157.site/jipitaxmwoi5.pdfIn PDF document text
    • http://circulyarkadigital.xyz/arte_renacentista_pintura_escultura_y_arquitectura_caracteristicas8at3p.pdfIn PDF document text
    • https://fukoroxovelamos.weebly.com/uploads/1/3/0/7/130776486/loxefununasu_bobevudesu_vejokawadiv.pdfIn PDF document text
    • http://menbp.online/81037038996qu8k.pdfIn PDF document text
    • https://namosupegu.weebly.com/uploads/1/3/4/3/134313644/1b7b5ecff09d7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427529/normal_5ffcefcb1478a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422161/normal_600cb6a7b5960.pdfIn PDF document text
    • http://mritzoliver.design/fumedawjqm5v.pdfIn PDF document text
    • https://vadutebo.weebly.com/uploads/1/3/4/8/134889136/nijoker.pdfIn PDF document text
    • https://gosopitodemeku.weebly.com/uploads/1/3/4/8/134874694/aafa7.pdfIn PDF document text
    • https://mevemedetu.weebly.com/uploads/1/3/1/8/131871578/537986c2c29.pdfIn PDF document text
    • http://mybatut.store/shameless_season_1_downloadgsddy.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://104e0e48-a4c2-4a03-8647-06ef64d4e6ac.filesusr.com/ugd/e2c6c1_e511d972c4204973a72481a0d16ddd61.pdf?index=trueIn PDF document text
    • http://vodevuparebe.epizy.com/javifokagafovabolowel.pdfIn PDF document text
    • http://suludowoseti.epizy.com/kanenajinofo.pdfIn PDF document text
    • http://jawikaginixuxuz.rf.gd/leropebosexatodivobazija.pdfIn PDF document text
    • https://4dcfe184-cd6c-48f8-9f23-5461c743a1d4.filesusr.com/ugd/cc8533_99c4c657c81a4f6093b887c4187e0354.pdf?index=trueIn PDF document text
    • https://569961a5-e6b5-462d-8b38-7193d5e7b20b.filesusr.com/ugd/a37a2e_5ec5346a3f424603aeeedb77a53f7c63.pdf?index=trueIn PDF document text
    • https://6bb2b61b-82bf-473b-8365-63ddb02ddbdd.filesusr.com/ugd/d55797_fc3820de5ccf41b8a5c94e0f80b49a0a.pdf?index=trueIn PDF document text
    • http://kegunujav.epizy.com/lutupexufusawevubafunomez.pdfIn PDF document text
    • http://voxotili.epizy.com/hormone_replacement_therapy_guidelines_canada.pdfIn PDF document text
    • http://sobajagas.rf.gd/52471097298.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_off00012b31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B31 5520 bytes
SHA-256: 0b240a9576fa02502340c60c8980588914d2c49452666614e2b1dcbf066f6f86
font_01_sfnt_off00013dcd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13DCD 10264 bytes
SHA-256: 247e97ce2149a4e9695ba60911f964479252f9bacc298766f4f83e3e576e32b7