Malicious PDF — malware analysis report

Static analysis result for SHA-256 c00b93d63e0dc239…

MALICIOUS

PDF

79.5 KB Created: 2021-06-04 08:15:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 09f416b6096acdbf4748f89e2f83cb27 SHA-1: e99f96d1d2a75194476f064686ef07bf7885c249 SHA-256: c00b93d63e0dc239e3590dac896bfb3e15cc6e0d6b01693e1bff901da841098c
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 0.9994

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://infrive.ru/pbw?utm_term=gender+race+and+class+in+media+5th+edition+pdf+free PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4450426/normal_602d846f19e83.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414848/normal_60651b670e304.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392667/normal_5ff8b855d6963.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488574/normal_601243ce40f8e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470029/normal_5ff51cd9b738a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374175/normal_5fe5f0279e49e.pdfIn PDF document text
    • https://govasosu.weebly.com/uploads/1/3/4/5/134519533/517544.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448343/normal_60512b434bdc1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375195/normal_60493eb9c667b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4467915/normal_5ff76874a1065.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490375/normal_602ef27d54c7c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416798/normal_6042ec572487f.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4500450/normal_60afff5bd96c6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4462038/normal_5fddaf5b2be0e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391903/normal_604721f245fd5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495684/normal_5fcb1dbb595b4.pdfIn PDF document text
    • https://povefedonigo.weebly.com/uploads/1/3/1/6/131637150/xowajekuvojama_xubinodowemota.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465559/normal_60463196706b5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455914/normal_6040f3282a110.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4492250/normal_600f4c8167ef8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368242/normal_5fe33dc2f16b0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://ronefete.pbworks.com/w/file/fetch/144492234/what_are_the_three_types_of_infinitives.pdfIn PDF document text
    • http://dobifapig.pbworks.com/f/4253265274.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_off0000f75b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF75B 5548 bytes
SHA-256: 4a0b2cf4f5a4d4bd88fb2a921fcfc90936548f80f55cacdbd7582885f710aaec
font_01_sfnt_off00010a14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A14 11228 bytes
SHA-256: 411365bdcefcaa570de41016e16de47fd82a1efd04d44ecb2e8cd3e736188d0d

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