Malicious PDF — malware analysis report

Static analysis result for SHA-256 a518335a2cfa963d…

MALICIOUS

PDF

71.7 KB Created: 2020-11-25 06:41:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 4309858c1f185f13ca49d0e5ff83c4e4 SHA-1: b7af0df8ad15c701f77d37b322c89308e5e06715 SHA-256: a518335a2cfa963d8874357094151f512dd306194a1c35bb9f3de4d08abfd56c
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 0.9997

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/strik?utm_term=wow+classic+rfk+quest+guide PDF link annotation
    • https://wibugosavuzatug.weebly.com/uploads/1/3/4/3/134349607/kalapuxivujeb-zibogofonuz-pugerowa-dorasotaj.pdfIn PDF document text
    • https://gixawixo.weebly.com/uploads/1/3/4/3/134322292/9531529.pdfIn PDF document text
    • https://xepebujusu.weebly.com/uploads/1/3/4/3/134319702/1520721.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420608/normal_5f98dab5566a6.pdfIn PDF document text
    • https://pawusimogi.weebly.com/uploads/1/3/4/4/134444718/pojujov.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/3322e08e-266f-4c24-a305-c7741c5c59bf/94752510691.pdfIn PDF document text
    • https://s3.amazonaws.com/wibedubosateg/guide_gear_canvas_wall_tent_reviews.pdfIn PDF document text
    • https://s3.amazonaws.com/najubu/61392757875.pdfIn PDF document text
    • https://s3.amazonaws.com/xedewofuretujo/21266670997.pdfIn PDF document text
    • https://s3.amazonaws.com/mufukep/bsa_physical_form_a_and_b.pdfIn PDF document text
    • https://s3.amazonaws.com/mudurixo/81245646704.pdfIn PDF document text
    • https://s3.amazonaws.com/kijelopazekune/batatiwuveme.pdfIn PDF document text
    • https://s3.amazonaws.com/lizuseguwix/64522251062.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_off0000dbf4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBF4 5484 bytes
SHA-256: 9d1df6d175484920f17dbda8e5f14100f10af04a69ab27a10608b4857b30b56b
font_01_sfnt_off0000eebf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEBF 10364 bytes
SHA-256: a9fcb51d11d805e9dc6fa80bb10ea84db8e24c0c43473c364eda767cff8f2d57