Malicious PDF — malware analysis report

Static analysis result for SHA-256 49052fc2f95ca06d…

MALICIOUS

PDF

63.8 KB Created: 2020-11-10 20:09:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: f6fc0b08facbe88a959208e4f7636fc0 SHA-1: d242433b56afaa023a3227a3d54e5da3bb9803f5 SHA-256: 49052fc2f95ca06d814d2abd3253e09fa46adcc54680077f928c8f2735a202b8
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://traffnew.ru/strik?keyword=dbt+pros+and+cons+worksheet+pdf PDF link annotation
    • https://wunamixexot.weebly.com/uploads/1/3/4/4/134456109/naput-togane-kiwusot.pdfIn PDF document text
    • https://kikokowenut.weebly.com/uploads/1/3/4/7/134713101/wiwoja_zatorisu_nezeruxikawu.pdfIn PDF document text
    • https://wirexefe.weebly.com/uploads/1/3/4/5/134577033/1934615.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403404/normal_5faa186864abf.pdfIn PDF document text
    • https://japiravonasuv.weebly.com/uploads/1/3/4/6/134644749/sapabiroxedove.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/dc1afbcb-8722-4c04-9dfe-0c601b6f7fe0/89661972688.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd60a586-73da-450c-bb1a-6cfd29ab1e04/deloze.pdfIn PDF document text
    • https://s3.amazonaws.com/farezelof/long_shadows_warrior_cats.pdfIn PDF document text
    • https://s3.amazonaws.com/kewakuko/fulitejejajida.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a25f149f-ebc5-47d4-97a8-ed8dc1b4d4ce/dokoviwiwufonogopoj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/36f69bdf-8211-4df4-9325-8c3850f25a61/pojep.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_off0000be31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE31 5504 bytes
SHA-256: adc3948055137c308a7132b488e000a78b222bd24875b5d04371e8aca09cc1b9
font_01_sfnt_off0000d0f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0F5 9868 bytes
SHA-256: 9ac46ffd51553a96c181fe1ee4239687d956b54c18ad62016d2fc95f8853d74b