Malicious PDF — malware analysis report

Static analysis result for SHA-256 6674306301de35fa…

MALICIOUS

PDF

65.3 KB Created: 2020-11-25 01:45:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: ccbf1ac5ff96f0ea2c7f4999f81b365e SHA-1: 29ff0dad29305dd4b441c4418ab0f9423e9fafe6 SHA-256: 6674306301de35fa0f3b9b6ece3f6bbb502cf000434ddadc32cb510b365a3d41
186 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 6

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://traffine.ru/123?utm_term=igs+upr+humacao+2019 PDF link annotation
    • https://zokevuwokonumez.weebly.com/uploads/1/3/4/6/134682223/sevavutidunesil.pdfIn PDF document text
    • https://litazivufili.weebly.com/uploads/1/3/4/3/134305244/fafadefodujelaz-lotitupixak.pdfIn PDF document text
    • https://sukowaletudevux.weebly.com/uploads/1/3/0/8/130874669/ledabizanig.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407789/normal_5f928782f39d7.pdfIn PDF document text
    • https://xipumizi.weebly.com/uploads/1/3/4/7/134746986/jebexenipezigi.pdfIn PDF document text
    • https://nubonikajifubi.weebly.com/uploads/1/3/4/8/134882340/34d06d2b1e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446016/normal_5fa4d424236e8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370062/normal_5f8e9004259d3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446507/normal_5fbb50be564ad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369762/normal_5f9443a4ce209.pdfIn PDF document text
    • https://lilawowawumoxo.weebly.com/uploads/1/3/1/4/131453384/8663581.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/dazemi/ritafuribeduperubunupodom.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_off0000c0f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC0F4 5736 bytes
SHA-256: 14917efbfe3564be2697479be026a9f81c743ac503771107294d45bbfd3f0483
font_01_sfnt_off0000d452.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD452 10808 bytes
SHA-256: f55e7010f74f3e7b76e9ae4e14f3cf9f82fcfbd7a1711e9ab83a1efcd05fc850