Malicious PDF — malware analysis report

Static analysis result for SHA-256 29d42d0186a085df…

MALICIOUS

PDF

59.1 KB Created: 2020-11-21 23:55:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 42004a6c8f513ef6689dd7dbea1c4940 SHA-1: 226277e36d393274df07950cc4ef7fc0f16dcd3d SHA-256: 29d42d0186a085df8ebe71b41a91857f45bd73558a002e1175b15315ab7a8b00
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 0.9996

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://traffnew.ru/123?utm_term=chromosome+review+worksheet+answers PDF link annotation
    • https://kabudededawizo.weebly.com/uploads/1/3/1/3/131383409/jibovesar.pdfIn PDF document text
    • https://dujenavu.weebly.com/uploads/1/3/4/3/134366251/rajepubitura-jimeteso.pdfIn PDF document text
    • https://fupuvoriru.weebly.com/uploads/1/3/4/4/134494751/vafara.pdfIn PDF document text
    • https://robubafo.weebly.com/uploads/1/3/4/5/134588337/3419583.pdfIn PDF document text
    • https://kirewigofe.weebly.com/uploads/1/3/4/3/134382955/wegutafolepa_zagikisofo_pekukijuto_xopenaxifa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367916/normal_5fb6848cb6ebd.pdfIn PDF document text
    • https://kikuvabafot.weebly.com/uploads/1/3/4/3/134332304/4e761a429.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413467/normal_5fadc0d02b596.pdfIn PDF document text
    • https://vuwugaletop.weebly.com/uploads/1/3/4/5/134588193/67113b26.pdfIn PDF document text
    • https://delujopasetew.weebly.com/uploads/1/3/4/3/134399242/35200.pdfIn PDF document text
    • https://guzifako.weebly.com/uploads/1/3/4/0/134096492/lupobuzid-mixave-luzafafatas.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/liwelu/bobuwipubu.pdfIn PDF document text
    • https://s3.amazonaws.com/libeganot/50310182015.pdfIn PDF document text
    • https://s3.amazonaws.com/dejazuvorira/58117553772.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_off0000acf5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xACF5 5012 bytes
SHA-256: 829f7fc936bf5d05925b3ff14d565b8a9bedc143cbe3dd8b24312676ff81b1d9
font_01_sfnt_off0000bddf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBDDF 9940 bytes
SHA-256: 823cc803c9e13d6fbca5e0bcdde128a4f393896a9879ec317a08effd08a6afc4