Malicious PDF — malware analysis report

Static analysis result for SHA-256 d14a011a37891ac8…

MALICIOUS

PDF

68.5 KB Created: 2020-12-07 07:22:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: e1d6be42e47a0925b94cb7b5e70de907 SHA-1: ea0608911bd7c1fa046be8365907a2e4847fe2cc SHA-256: d14a011a37891ac86cf73e827f51f95e28899b9ff64cb6ab7899a3c167c52321
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 0.9998

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/aws?utm_term=rationalist+architecture+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4365619/normal_5f8b6f0230454.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365626/normal_5f893915ad369.pdfIn PDF document text
    • https://satobolusiv.weebly.com/uploads/1/3/1/3/131398412/xunitex.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4474998/normal_5fc4177b7a80b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464529/normal_5fb73e9d257b7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410956/normal_5f9877cabdf9d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365624/normal_5f9cff7156ff3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486351/normal_5fc70a1190210.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/sesafefanulokam/94746247581.pdfIn PDF document text
    • https://s3.amazonaws.com/nevovumowa/gaxosajoxel.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files2/relationship_awareness_theory.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8db10c29-9716-4df1-b4a6-71979998c451/ziwepexixuguxizejemumezek.pdfIn PDF document text
    • https://s3.amazonaws.com/jeromopelurab/30877778306.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_off0000cb8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB8D 5248 bytes
SHA-256: 548f307b5a07ff980da04d082ebd1c757a5b81c6638197561e68585a83383584
font_01_sfnt_off0000dd67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD67 13032 bytes
SHA-256: 2f9ff1f519fd982c0fa02a24db0bb7ab29b5afb8405249cd7ec14f25eeb5ee96