Malicious PDF — malware analysis report

Static analysis result for SHA-256 6543463ba0ddcca8…

MALICIOUS

PDF

61.7 KB Created: 2020-11-09 18:10:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 97f4110e47c13746661a7ea62dd413e3 SHA-1: 1d8287a3bafe37c7b1af7c838706657cde5df513 SHA-256: 6543463ba0ddcca848b3d4ff5b77216fd7a1e9c148ec290a6682008ff19ed1b8
156 Risk Score

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 0.9996

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
  • 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://traffnew.ru/aws?keyword=cessna+172+cockpit+kit PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4368475/normal_5f87ef5fbc610.pdfIn PDF document text
    • https://mogilifus.weebly.com/uploads/1/3/0/7/130739831/e7a433bb9f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365552/normal_5f87555f41821.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423171/normal_5fa1276bc925f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366005/normal_5f88b1bab6447.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411696/normal_5f9c77a7eac5f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408461/normal_5f9502d369a9d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456377/normal_5fa059a572def.pdfIn PDF document text
    • https://jizufolikoni.weebly.com/uploads/1/3/4/3/134349493/3373157.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/lejivugeleguwod/togemanapafimotuto.pdfIn PDF document text
    • https://s3.amazonaws.com/padoragog/time_control_dnd.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_off0000b4ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB4EC 5032 bytes
SHA-256: 2386908b258340c152b6e04bbabd6f6ca1b07f1a969b4534258e3f83c6f7bef2
font_01_sfnt_off0000c634.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC634 10772 bytes
SHA-256: fc3341ac543d1be5508a98253bd45cda3b1f4724d6a63de092f8fc8771e8fe12