Malicious PDF — malware analysis report

Static analysis result for SHA-256 454845f13f7566cf…

MALICIOUS

PDF

72.4 KB Created: 2021-02-17 16:41:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: f68bd8dc88e46e30590ec8423f0d8bd8 SHA-1: f3f2a7380defb18c7dd97267fece45d53b88ff5f SHA-256: 454845f13f7566cfdd15150d4b6ac465c107725ecce2160a34224f856139a0ee
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which are likely part of a link farm designed to direct users to malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as Pdf.Phishing.Trojan. The embedded URLs and the document's structure suggest it is used as a lure to redirect users to potentially harmful sites, aligning with phishing and malware distribution tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://bologen.ru/strik?utm_term=what+is+hybrid+office+365 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4416490/normal_601911ed2f25e.pdfIn PDF document text
    • https://cdn.sqhk.co/pixazizaze/hcVgj00/mefuwesuzeburuwuv.pdfIn PDF document text
    • https://cdn.sqhk.co/retagigimusa/jijhvgi/vezosikoxuwajobusikuzuk.pdfIn PDF document text
    • https://cdn.sqhk.co/lewivapawo/PiiPDhf/86441873029.pdfIn PDF document text
    • https://cdn.sqhk.co/gabixeme/fPQjeXh/datolepenakijupoviwapix.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426416/normal_5fe789331e338.pdfIn PDF document text
    • https://zurukonovode.weebly.com/uploads/1/3/1/3/131379219/podumeru-pugalotulu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458413/normal_5fda8fde132f8.pdfIn PDF document text
    • https://fibepuranes.weebly.com/uploads/1/3/4/0/134041348/1748496.pdfIn PDF document text
    • https://penuwepilaxol.weebly.com/uploads/1/3/4/7/134756509/58cce3ae8.pdfIn PDF document text
    • https://cdn.sqhk.co/sozimelizak/1icm8ih/cartilage_vocal_cord_attachment.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/ninazarila/sulem.pdfIn PDF document text
    • https://s3.amazonaws.com/fukepez/wexapopadogiv.pdfIn PDF document text
    • https://s3.amazonaws.com/bulozor/hog_hunting_guides_south_carolina.pdfIn PDF document text
    • http://manisamat.epizy.com/gabuxujofiduzevepe.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_off0000db42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB42 5776 bytes
SHA-256: 815614ae4b57a9d8845ccb1de083cb064fbb7d5ab951122a9f3df89c965835e8
font_01_sfnt_off0000eef5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEF5 10928 bytes
SHA-256: 7467c460bcaa10dbe3006fe7b3218510ae61e5e0b1e86e3a57a1acfb9c91199c

Open this report in the interactive analyzer, or submit your own file for analysis.