Malicious PDF — malware analysis report

Static analysis result for SHA-256 45c36824505f7fcb…

MALICIOUS

PDF

122.8 KB Created: 2020-11-11 19:57:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: ee63c2682318bf707ac4bbb1c0719e45 SHA-1: b359e9c0c887dc0e955d827acc122bae52076589 SHA-256: 45c36824505f7fcb840062c89f43dedf0e824dd1b13db23e60e2019225d575ae
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 0.9998

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://traffset.ru/wb?keyword=reliability%20and%20validity%20of%20qualitative%20research%20pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4379618/normal_5fabf9ad4a82d.pdfIn PDF document text
    • https://xesaranit.weebly.com/uploads/1/3/2/6/132696194/1324320.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406228/normal_5fa1ba10300cc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403947/normal_5f9466e958c9c.pdfIn PDF document text
    • https://faxevirasobiv.weebly.com/uploads/1/3/4/5/134597887/6333478.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366358/normal_5f881037ccc66.pdfIn PDF document text
    • https://kotugelofamoxu.weebly.com/uploads/1/3/4/4/134403640/4e012dce1bfd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376610/normal_5f8e5c3187d1c.pdfIn PDF document text
    • https://zovodexipelozas.weebly.com/uploads/1/3/4/4/134401167/bavorelalamedu.pdfIn PDF document text
    • https://jonipafatanepa.weebly.com/uploads/1/3/2/7/132741476/zijuzatuxegolu_tekub_goxuwiwu_wowab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427077/normal_5fa4f16aaeea5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416331/normal_5fa642079b61b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368467/normal_5f8a1f1ad80c5.pdfIn PDF document text
    • https://wesegirudupu.weebly.com/uploads/1/3/4/6/134631264/a5e0417aff6e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00019ebe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19EBE 5676 bytes
SHA-256: c6f10c412568288f5dccfe50a91042e580c756d5f1568707476e47af89dbcb7c
font_01_sfnt_off0001b213.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B213 14676 bytes
SHA-256: 30d3295a2bc21ce8357db7074f70fa2e4fc9e73be7758585f68281d55e3b7a8d

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