Malicious PDF — malware analysis report

Static analysis result for SHA-256 22e0a953985425bb…

MALICIOUS

PDF

68.2 KB Created: 2020-11-09 19:40:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 66aa208fc204b24c173df6f838936295 SHA-1: 7ca9a14d9f7e6b31bb19cd09d2d5db2850b359b0 SHA-256: 22e0a953985425bbcc8c7ea48e36fbc437d64d4634af84a10b9f3a666400fccd
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a large number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic, suggesting a malicious intent to redirect users. The ClamAV detection and ML classifier further support its malicious nature. While no scripts were explicitly extracted, the PDF structure and embedded URIs indicate a phishing or link-farming attack vector.

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 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://trafftec.ru/123?keyword=ancient+greek+jury PDF link annotation
    • https://seriraradekabas.weebly.com/uploads/1/3/4/0/134016679/d240d.pdfIn PDF document text
    • https://biwugina.weebly.com/uploads/1/3/1/1/131163984/sewonosorunobaluj.pdfIn PDF document text
    • https://fafugugopogewip.weebly.com/uploads/1/3/4/4/134464831/rorigifaravatulekega.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/sojuravewi/definicion_de_energia_nuclear.pdfIn PDF document text
    • https://s3.amazonaws.com/fikuvine/windsor_castle_history.pdfIn PDF document text
    • https://s3.amazonaws.com/sugaguxagu/alternative_dispute_resolution_robeniol.pdfIn PDF document text
    • https://s3.amazonaws.com/pazifetanegapu/27898028783.pdfIn PDF document text
    • https://s3.amazonaws.com/novifamigot/sex_emojis_for_iphone_8_plus.pdfIn PDF document text
    • https://s3.amazonaws.com/viromibukoleliw/secmen_kaydi_sorgulama.pdfIn PDF document text
    • https://s3.amazonaws.com/nabifovu/wind_turbine_failure_rate_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/pojojagajevuxa/hairfinity_before_and_after_6_months.pdfIn PDF document text
    • https://s3.amazonaws.com/bisegilupuf/drawing_quadratic_graphs_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b0eab6d6-417a-4418-81e5-16fb9bf689c5/nusizumum.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_off0000cf6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF6C 4780 bytes
SHA-256: bf526eb81933a9980ed49be7ab0f55798717a65ff91ce9fdc4dd20efab4fc607
font_01_sfnt_off0000dfd9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFD9 10744 bytes
SHA-256: c0351632c053bbb9616ab50ddeab4279556b31b711ad02edbda3f706c94e89c1

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