Malicious PDF — malware analysis report

Static analysis result for SHA-256 0370f50ae792e428…

MALICIOUS

PDF

81.4 KB Created: 2021-05-07 13:37:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: b46ee9e35562bf06b66182d6f7023a59 SHA-1: 6568da2d5cf4c00c229931645d8101cc61f9348f SHA-256: 0370f50ae792e428dda5ffad614f50ab52412bbdcc0ff8ab5216b9a8842e419e
186 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by a ClamAV signature and an ML classifier. It contains a large number of external links, many pointing to disposable domains, suggesting a link farm or phishing campaign. The embedded links likely lead to further malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://midufefew.ru/strik?utm_term=small+hazelnut+iced+coffee+dunkin+donuts+calories PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4385853/normal_600ca996081a4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368487/normal_605da9c2da506.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465144/normal_601ab292cb008.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419437/normal_5ff82bd29d15e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383452/normal_5fefff74c748d.pdfIn PDF document text
    • https://wijodemarivupi.weebly.com/uploads/1/3/4/8/134861972/mizapiwi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476142/normal_602365a43fc18.pdfIn PDF document text
    • http://kebakef.iblogger.org/determination_of_spring_constant_lab_report.pdfIn PDF document text
    • https://bamiwesuwo.weebly.com/uploads/1/3/5/3/135390748/kojuvagisomizatub.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474448/normal_60176a7ab6316.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485296/normal_605d90b394511.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/papuja/84700025019.pdfIn PDF document text
    • http://kiwozoma.epizy.com/15905603878.pdfIn PDF document text
    • http://kenalukebuv.epizy.com/how_to_say_new_moon_in_different_languages.pdfIn PDF document text
    • https://s3.amazonaws.com/jinotugiwomo/sample_accomplishment_report_in_mapeh.pdfIn PDF document text
    • https://s3.amazonaws.com/rurosaveruk/lagevakagimeraguwojiwi.pdfIn PDF document text
    • http://vajexakatozezal.epizy.com/avoiding_the_use_of_chemical_pesticides.pdfIn PDF document text
    • http://lisirowi.rf.gd/85338054508.pdfIn PDF document text
    • http://miledekulimikem.rf.gd/13745175588.pdfIn PDF document text
    • http://niwuganol.epizy.com/17124901642.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_off0000fc6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC6B 5476 bytes
SHA-256: 7204fd3b1e94d24011fe80a7918d83f2dfdc1ea5ef8af44e99879ab1581f2fed
font_01_sfnt_off00010ee6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EE6 12332 bytes
SHA-256: 86189572e65b7830d7ddf918f91ad5b2b0cc35148c79686e88b0b52b88c092c5

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