Malicious PDF — malware analysis report

Static analysis result for SHA-256 e301c3bec6fcc22c…

MALICIOUS

PDF

88.2 KB Created: 2021-05-28 08:40:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: f78d0f5cf1bcd244b1110f9b68e308e9 SHA-1: eb4b8917466779b8fb2a781ac6af9e591d971bf7 SHA-256: e301c3bec6fcc22cc5c0235552d5fa449622b4b93ef1a99ad6731c6afe8e0bca
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • 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://baarspo.ru/strik?utm_term=how+to+pair+skullcandy+crusher+anc PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4501794/normal_5feb8bffddd50.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408709/normal_6005743de2a66.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402503/normal_5fe39363b9cd2.pdfIn PDF document text
    • https://jerepuda.weebly.com/uploads/1/3/4/7/134745202/4502281.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373998/normal_603e89572f508.pdfIn PDF document text
    • https://zifusotoxiwi.weebly.com/uploads/1/3/4/4/134476210/1c653116dbf7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4423166/normal_5fe6038f775f3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481061/normal_602d87582f4ab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481539/normal_60121e936c32d.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4444386/normal_60b0745988866.pdfIn PDF document text
    • https://xudixakutax.weebly.com/uploads/1/3/0/7/130776611/2684759.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418587/normal_5fd0de2caadc7.pdfIn PDF document text
    • https://dekoreriso.weebly.com/uploads/1/3/7/5/137501726/4659b.pdfIn PDF document text
    • https://varowuzogan.weebly.com/uploads/1/3/1/8/131856285/demevidi-xefamagiruj.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481273/normal_5fc7d87253afa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377388/normal_6013d8626ac2a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4373520/normal_5fc5a30319717.pdfIn PDF document text
    • https://peworiwuka.weebly.com/uploads/1/3/4/6/134693567/vosadiregamipa_lebofit_kapewobafutid_figebilesoba.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/5cbc1750-e29a-4e6c-992d-e5d13a96347f/fagejajivigosuzal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3746a627-d859-445d-a722-e9b79c52b4f1/vevurotisowopesasunorala.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/21332f5b-1234-4fe9-be86-4cbcf52e3c5c/supply_chain_management_systems_include.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c272c8aa-e416-4bc2-9b34-3fd031e1e2e6/wulugixoxemakava.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_off0001158d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1158D 5380 bytes
SHA-256: 91c9a27abed5c701b7346963da904088f9143a190b73fb03d3135a89a213b7af
font_01_sfnt_off000127e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127E4 13440 bytes
SHA-256: 9b45f5ddf26d40b4660885b7a4336939a88cc0cdd4ca5e3e823c9ff839e8e0ad

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