Malicious PDF — malware analysis report

Static analysis result for SHA-256 21aff550d1606536…

MALICIOUS

PDF

104.5 KB Created: 2021-06-10 03:41:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: ca2841fa846be65f0d8c70da7759eea3 SHA-1: c691db51cb873f665bc29e03dcdc7bc13d20e17c SHA-256: 21aff550d1606536af06990aaf75e440a5f98157b7329850e3c307e821153a1d
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains a heuristic indicating it is a link farm on disposable hosting, with a specific URL embedded that promises free access to 'borat 2020 online free'. This suggests a phishing or scam attempt to redirect users to potentially malicious content. The ML classifier and ClamAV detection further support the malicious nature of this PDF.

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 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://garglob.ru/pbw?utm_term=watch+borat+2020+online+free PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4423728/normal_5fdbb9d7e3fba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490252/normal_6042006b96b80.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455670/normal_5fffe7010ce3e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459029/normal_6030f5ef3d1e5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443598/normal_6013a1915c6af.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413705/normal_5fd7870996a04.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/d0bdedda-61d3-48f9-b6a9-e222515bcf66/30416432534.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ce51423f-8de2-4489-8a14-2e4acd576dd8/cuales_son_los_titulos_de_credito_mas_utilizados_en_mexico.pdfIn PDF document text
    • http://palejemevat.pbworks.com/w/file/fetch/144769452/6420524906.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/36d26f78-60ed-4c0d-822a-eebe89074e91/10475571631.pdfIn PDF document text
    • http://kusarolox.pbworks.com/f/mipupiliwapoxelemox.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/154e4698-bb93-4000-9c1d-8767fe7e9dc3/rutekizi.pdfIn PDF document text
    • http://farejutotej.pbworks.com/w/file/fetch/144531756/what_does_auto_2_sided_printing_mean.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f46f333-b9c1-4239-901f-2022b8586ea1/63789851665.pdfIn PDF document text
    • http://lakebimutep.pbworks.com/w/file/fetch/144427470/how_to_make_a_school_calendar_on_word.pdfIn PDF document text
    • http://fixulirulafa.pbworks.com/f/vuzazebuzomemapop.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/30e9b4e2-c0ac-4447-9566-73f70cc7b474/namekedefimatoniloza.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2f039f8e-dc27-4999-b8e6-c7f5ced88433/67421627919.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

Related samples 7

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_off00015a5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15A5F 5216 bytes
SHA-256: b1001fe71a05a4567377a27d3b2ce67c3593e084ad6bc562b1a812a1d37441eb
font_01_sfnt_off00016c29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16C29 12228 bytes
SHA-256: d61b83e666d22a7956e778a4d3f7c608cb27e5ae28557d0ef405a494d549ccfc

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