Malicious PDF — malware analysis report

Static analysis result for SHA-256 6be64c4e554ca627…

MALICIOUS

PDF

70.3 KB Created: 2021-01-12 17:52:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 0adf5bbf4c76e3a5ef1e2f126f0dfefc SHA-1: e0b9b46d441206d3636c50f24e4c1e53a4b13dc0 SHA-256: 6be64c4e554ca6278e14a620acba367a59b203fef7672dc1e0aea589704120b2
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous external links, with one specifically pointing to 'traffking.ru' which is likely part of a link farm or phishing operation. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, suggesting an attempt to manipulate search results or distribute malicious content. ClamAV and ML classifiers also flagged this PDF as malicious, supporting the phishing and malware distribution intent.

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://traffking.ru/wb?keyword=swahili%20worship%20songs%20lyrics%20pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4465142/normal_5fa8dcd488a12.pdfIn PDF document text
    • https://site-1168354.mozfiles.com/files/1168354/axis_football_2019_xbox_one_review.pdfIn PDF document text
    • https://vusuvorolom.weebly.com/uploads/1/3/4/5/134501440/rekumo-sigoled.pdfIn PDF document text
    • https://site-1175981.mozfiles.com/files/1175981/descargar_survivalcraft_apkpure.pdfIn PDF document text
    • https://site-1176339.mozfiles.com/files/1176339/5924281250.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380082/normal_5ff9e570cfb4b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367017/normal_5f889d976b1fb.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/potofaw/guidelines_for_auditing_process_safety_management_systems.pdfIn PDF document text
    • https://s3.amazonaws.com/rebomedug/3340685526.pdfIn PDF document text
    • https://s3.amazonaws.com/wusigipufuvowix/gidifeja.pdfIn PDF document text
    • https://s3.amazonaws.com/fejatepudopito/wow_moonkin_form_reddit.pdfIn PDF document text
    • https://s3.amazonaws.com/fowonaxul/54487960625.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_off0000d438.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD438 5716 bytes
SHA-256: e5157bfda2f88b6a1672efe8d7d2a2d519829e2d952f19a2faeec2119e1e5c65
font_01_sfnt_off0000e7c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7C3 10852 bytes
SHA-256: d7e4f336eba05fd11b97e27daa3dac1e4b43717b306d6546eef980c6a62b8ebe

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