Malicious PDF — malware analysis report

Static analysis result for SHA-256 5480d2e08c78221b…

MALICIOUS

PDF

76.6 KB Created: 2020-11-20 07:22:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 5cacf39e4a82e546e4f4c673d964256a SHA-1: c36e53bf3c347fdd4882bcf6852b9836d7305443 SHA-256: 5480d2e08c78221be00f2e80c3bb5b09e81f8831c88bcbb3ab51f9b8513dcffb
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many of which point to potentially malicious domains, suggesting a link farm or phishing attempt. The ClamAV detection and ML classifier strongly indicate malicious intent. The embedded URL 'https://traffnew.ru/123?utm_term=notice+of+pending+action+release+format' is likely the primary destination for the phishing lure.

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://traffnew.ru/123?utm_term=notice+of+pending+action+release+format PDF link annotation
    • https://sibakixode.weebly.com/uploads/1/3/2/8/132814768/ee9fec6a8fe.pdfIn PDF document text
    • https://semufevesi.weebly.com/uploads/1/3/4/7/134733881/2438222.pdfIn PDF document text
    • https://lilepixot.weebly.com/uploads/1/3/4/4/134462463/memujovigusuguxelazo.pdfIn PDF document text
    • https://bigogewoxof.weebly.com/uploads/1/3/0/7/130739615/taxazogaxatafe.pdfIn PDF document text
    • https://jeponiruwapin.weebly.com/uploads/1/3/0/7/130776483/gurom.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/d0cc772a-8b3e-48db-a762-97640a882c16/guluvopokipikud.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b24bd80-3d60-4e2f-96be-f44acd943412/92412678312.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0bbed077-f2a4-43db-ac45-404dcd49bde3/xodedunifutakezajup.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/521e7326-f3b8-4b40-81e1-49397e84ab86/najaxuzasemidefuv.pdfIn PDF document text
    • https://s3.amazonaws.com/sikuva/samegozib.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e78f9ea-42f6-4503-943c-5ec9bcd9f857/lixuzamubukezumesawe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c40a84f3-1499-4ca6-9c58-d3a39986158c/zowefagipod.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d46ce32e-4800-4fe3-b691-481054d4e322/siverogivadumixawozepun.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8ff94bff-3166-41fd-b17e-20a3adf46a3a/81186827273.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_off0000ef02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF02 5444 bytes
SHA-256: 4e031129d93808bd0cb8454b2caff83699420460b6c2d9e170eea8f47593a78e
font_01_sfnt_off00010181.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10181 10604 bytes
SHA-256: 60f3ef6e7c447cb78153fc4471d63a75118490f6004883997896efebd7fb4ded

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