Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee788b96313310de…

MALICIOUS

PDF

70.6 KB Created: 2020-12-05 14:26:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 2d2564b566390854daefbb96bd26a6ca SHA-1: 22e7020d1941558acf20413ae09b4913abf878fa SHA-256: ee788b96313310de30748d9eb7b2f3e801d1e6b1f447c816c0b2b2cfbea679ea
186 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 6

  • 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.
  • 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://trafffi.ru/strik?utm_term=english+to+french+canadian+conversion PDF link annotation
    • https://xataramev.weebly.com/uploads/1/3/4/3/134320843/bedijenutowulixa.pdfIn PDF document text
    • https://gemaxudemaxepeb.weebly.com/uploads/1/3/1/0/131070646/kovewa.pdfIn PDF document text
    • https://naxogarom.weebly.com/uploads/1/3/4/5/134527325/7c3efc6.pdfIn PDF document text
    • https://panirosarukiza.weebly.com/uploads/1/3/4/1/134132539/8355877.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417422/normal_5fabbddf4a4cf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366331/normal_5f904efebb008.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388412/normal_5faacc00ca77c.pdfIn PDF document text
    • https://mufebukevep.weebly.com/uploads/1/3/4/0/134096334/7489373.pdfIn PDF document text
    • https://wofinomedek.weebly.com/uploads/1/3/4/1/134108675/xapatu_zokunodirelirum_dagusoji.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382960/normal_5f8f4b15092e3.pdfIn PDF document text
    • https://vakuvovigoder.weebly.com/uploads/1/3/4/4/134467198/5123937.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391327/normal_5fb00e7bdd5ac.pdfIn PDF document text
    • https://kupelaranix.weebly.com/uploads/1/3/4/7/134729830/6089690.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc5883be9fc3622d541520a/t/5fc79e5f3ac9c763f4dd346e/1606917730182/18962839261.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc6c59a03f04e270fe027bd/t/5fc9bc78414f5e352378b4cf/1607056505416/ittf_table_tennis_score_sheet.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0dda31452f90b7fe53205/t/5fc404e73485235c86434d40/1606681832778/vevajolo.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_off0000d631.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD631 5300 bytes
SHA-256: 44b9ecfa9c4f383b8c1074171000b25bbf99f080393824afd731492440417d21
font_01_sfnt_off0000e844.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE844 10776 bytes
SHA-256: 7115266522896438c6a01ecdf948256db6b4d16c38b9f0ec414fcc4e25be03d3

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