Malicious PDF — malware analysis report

Static analysis result for SHA-256 69ba7154f4fb3c36…

MALICIOUS

PDF

66.9 KB Created: 2020-12-07 06:32:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 3ed79e8065fe231384c3115c54f4636e SHA-1: d1cedc2387f577f4abd2fbab553669bf20a84a1b SHA-256: 69ba7154f4fb3c368399d5418c7a02f9c48db3f62bbf108aa3ecc6bb75601202
214 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded URLs, with at least one pointing to known malicious redirector infrastructure. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, suggesting an attempt to manipulate search engine results or redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://cctraff.ru/aws?utm_term=vda+automotive+spice+guidelines In PDF document text
    • https://cdn-cms.f-static.net/uploads/4489740/normal_5fbe9a31748bd.pdfIn PDF document text
    • https://jikiwifapa.weebly.com/uploads/1/3/4/3/134338998/fukab.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/nagavuwofapan/vogumonutugasod.pdfIn PDF document text
    • https://s3.amazonaws.com/jezobasit/slayer_south_of_heaven_guitar_tab.pdfIn PDF document text
    • https://s3.amazonaws.com/piradi/2729859723.pdfIn PDF document text
    • https://s3.amazonaws.com/tadovu/90098952448.pdfIn PDF document text
    • https://s3.amazonaws.com/rodakarugupoko/12241918634.pdfIn PDF document text
    • https://s3.amazonaws.com/jivala/thermacell_canadian_tire.pdfIn PDF document text
    • https://s3.amazonaws.com/ginutu/76649943451.pdfIn PDF document text
    • https://s3.amazonaws.com/nademopor/amma_kavithai_picture.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_off0000c555.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC555 5320 bytes
SHA-256: 858a7adae5a74fdbc113bc10d4db9c98d8abb93351da47d7cd17561fc65725ed
font_01_sfnt_off0000d76b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD76B 11476 bytes
SHA-256: 46fb6086e4e7a790835aa711c2cb7e890e26fde4140db279aa58029a28f0a152

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