Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e46339a94d58e83…

MALICIOUS

PDF

80.3 KB Created: 2021-05-28 03:42:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: de2ae56315ca80b6f8851b9afc13a844 SHA-1: 79c6ca2e7309c4b685bab1e46cae551300b39362 SHA-256: 2e46339a94d58e83635f8b66ebe90c259d4c68f86f252e759df0e42de6364de8
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 0.9996

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://vilenefex.ru/123?utm_term=atelectasis+breathing+exercises+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4473035/normal_5feb0fe9a67d2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376086/normal_6009332522ec2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454045/normal_6025cd34ad40c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390996/normal_601e7cf87428c.pdfIn PDF document text
    • https://zisawotagaxikad.weebly.com/uploads/1/3/4/4/134478332/30f2bf031.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421335/normal_5fdefd06b4b75.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421477/normal_605bcb52ad9b7.pdfIn PDF document text
    • https://tatojevukud.weebly.com/uploads/1/3/7/5/137508330/6071223.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366354/normal_606d26fb07558.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501486/normal_5fef5a8e6bd26.pdfIn PDF document text
    • https://levalezekavazif.weebly.com/uploads/1/3/4/6/134639406/243602.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/d932f2af-b6f9-4251-aea6-f43bb3ba03c0/ruwifaxexoxepotowekitozut.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6b0f7833-372e-4239-a814-cfc7bfd79381/what_does_adverse_conduct_mean.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/91f4a399-b8ee-4e3b-9cf4-81cf596f72d7/ariens_24_snowblower_skid_shoes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/414c02e3-d479-4f3f-9dc0-55ca36aa4bfe/supply_chain_management_jobs_temple_tx.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/03faf532-b9b1-4b29-8935-409e5ad81e5d/1108136779.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8451312f-6050-4eff-b63d-52b3d0d1bb0a/suvexoxu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/470ee07e-08b5-4dad-99d8-f0c1b049d435/vejuvararozapuniwe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f7e701e9-7631-453c-a01e-94bc1ab806db/nozajo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c242a5f2-ae4f-4fff-9d7d-e21ceb96382e/wipobedesovazamamagisima.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1bc2c342-9c76-4457-979c-5feb663daa85/47094282525.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/23205853-a770-46d4-94a7-80f735758217/cryptography_and_network_security_projects_ideas.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_off0000fa47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA47 5616 bytes
SHA-256: 13c80010de1365b900b2f1544a5fd766286146680cb2d05660b113862230db15
font_01_sfnt_off00010d58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D58 11160 bytes
SHA-256: 0c1d983f62b4bb1f656392df85e2baf9b607b1c918fc3dabb8651f22089fc70a

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