Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7a893f4bbdeeecd…

MALICIOUS

PDF

68.1 KB Created: 2021-01-10 03:34:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 6d0daab35834c517d8308863b916bff1 SHA-1: a01a32a820cdd2e306be7b2eee1d75d829a8202e SHA-256: e7a893f4bbdeeecdf25a142855cf18b468774dd1df89efd8b6861aadc34e4e22
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://traffine.ru/aws?utm_term=mendelian+genetics+lab+worksheet PDF link annotation
    • https://lilawowawumoxo.weebly.com/uploads/1/3/1/4/131453384/810fbf551290d.pdfIn PDF document text
    • https://site-1177793.mozfiles.com/files/1177793/buratakefilogerijox.pdfIn PDF document text
    • https://bemazinava.weebly.com/uploads/1/3/4/8/134890863/wamez.pdfIn PDF document text
    • https://site-1172210.mozfiles.com/files/1172210/poutine_food_truck_denver.pdfIn PDF document text
    • https://site-1175524.mozfiles.com/files/1175524/colonized_map_of_africa.pdfIn PDF document text
    • https://cdn.sqhk.co/vidoperife/Rkgduie/82685640895.pdfIn PDF document text
    • https://cdn.sqhk.co/tovasodoj/fihh7JY/soccer_world_cup_qualifiers.pdfIn PDF document text
    • https://site-1168112.mozfiles.com/files/1168112/70266487752.pdfIn PDF document text
    • https://cdn.sqhk.co/bitomasijelo/hhTAibK/90570708387.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/rolefosiju/serikadupunenegimijuripa.pdfIn PDF document text
    • https://s3.amazonaws.com/zarusegibitumet/begimukobadaludejuke.pdfIn PDF document text
    • https://s3.amazonaws.com/mipeboro/shear_force_and_bending_moment_diagrams.pdfIn PDF document text
    • https://s3.amazonaws.com/bodajaku/accident_report_template_osha.pdfIn PDF document text
    • https://s3.amazonaws.com/zinudipir/mesexugenunukiz.pdfIn PDF document text
    • https://s3.amazonaws.com/tadevewuju/31764586077.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_off0000cae2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAE2 5500 bytes
SHA-256: 2a6abf195c4637876036be285cbb93f16ec29bea0081cf35a216e5cab3f50d80
font_01_sfnt_off0000ddad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDAD 11184 bytes
SHA-256: d9e547b1c4e23b2bbeebf06ac8b31d3c4087f5e2344e27213bb3e9dd235ad9d7

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