Malicious PDF — malware analysis report

Static analysis result for SHA-256 05562e9be9ba3897…

MALICIOUS

PDF

67.8 KB Created: 2020-11-20 01:15:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 9cb386c9663a960c7e9650b1484a5d8c SHA-1: efdf9876ca4f1d72967b5c59fd857fc73010c543 SHA-256: 05562e9be9ba3897b673355a16939823d980bd8f2b7f230731749ab556b69e15
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of external links, identified as a link farm, with one prominent URL pointing to a suspicious domain. ClamAV and ML classifiers also flagged this PDF as malicious, specifically as a phishing trojan. While no scripts were explicitly extracted, the PDF structure and the presence of numerous external links suggest an attempt to redirect users to malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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://trafficel.ru/strik?utm_term=hormigon+h+25+caracteristicas+do PDF link annotation
    • https://vogoworelo.weebly.com/uploads/1/3/4/2/134266182/4fa8c6bea4b7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448124/normal_5f9ed0e554661.pdfIn PDF document text
    • https://laxomubidaxudov.weebly.com/uploads/1/3/4/4/134475580/4700322.pdfIn PDF document text
    • https://batarodev.weebly.com/uploads/1/3/1/3/131380453/5899053.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/rujabepifar/canara_bank_rtgs_form.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/spring_cloud_data_flow_book.pdfIn PDF document text
    • https://s3.amazonaws.com/rokuwapesu/ballade_in_g_minor_chopin.pdfIn PDF document text
    • https://s3.amazonaws.com/dinisemowoge/41281751633.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9c876649-bb41-427c-80a2-8ca16ab4539b/fumubagewor.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c10a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC10A 5328 bytes
SHA-256: f0fb656f6bcadf23eff3b12a88d006ce2abee425fc69cdd79187fba08799e76a
font_01_sfnt_off0000d2e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2E7 10020 bytes
SHA-256: de3cc6511ee9330b22cab2cc8360a19ac8473ed04f808f641ac4ce2daecdc428
font_02_sfnt_off0000f4bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4BB 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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