Malicious PDF — malware analysis report

Static analysis result for SHA-256 da77d0b4af433a5b…

MALICIOUS

PDF

75.4 KB Created: 2021-03-23 23:09:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 9d0c3a7587287050536fa853ff14fedc SHA-1: 23162dab1d78907f46bbcaa4f5feb7b287ef9ccd SHA-256: da77d0b4af433a5b360940ea3d861b92e942bd470545fc9d9d832359aff058fa
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 are SEO-optimized and point to potentially malicious PDF documents. The primary URL, 'https://seumenha.ru/wix?keyword=canon+printer+pixma+mx472+manual', suggests a lure to trick users into clicking malicious links disguised as search results. ClamAV and ML classifiers strongly indicate malicious intent, specifically classifying it as a phishing trojan.

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://seumenha.ru/wix?keyword=canon+printer+pixma+mx472+manual PDF link annotation
    • http://hytri.com/rakegiwobofotowiguxkub3u.pdfIn PDF document text
    • http://montana-media.com/45269768668tuqkq.pdfIn PDF document text
    • http://xudogiborijum.66ghz.com/90156885332.pdfIn PDF document text
    • http://nimojojisox.22web.org/kalijubijugebuferifutomeg.pdfIn PDF document text
    • http://leftoutclub.com/patazerobekibesiv6736q.pdfIn PDF document text
    • http://stassikorskyi.com/disadvantages_of_information_technology_essaycre7e.pdfIn PDF document text
    • http://lovemecompletely.com/microsoft_project_2016_download_64_bit_freepieq4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://348ddb29-83e1-4812-94a1-743b72ef9b42.filesusr.com/ugd/23b571_e85af7ee8f7643f4a5568509e1d8b120.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lerezazo/fake_adoption_papers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6809fa04-c448-40b2-906f-fe3f8efe7411/36325508534.pdfIn PDF document text
    • https://s3.amazonaws.com/bejokazemur/bengali_movie_online_free_filmywap.pdfIn PDF document text
    • https://s3.amazonaws.com/guvovigo/79314867358.pdfIn PDF document text
    • https://s3.amazonaws.com/wutezigojuxi/bodas_de_sangre_pelcula_la_novia.pdfIn PDF document text
    • https://cda84be5-0c54-4c05-8389-97bb004c798d.filesusr.com/ugd/fa9f00_0ee6d06fd06a460489b822ee094a47e2.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zalisujezajaje/13527550552.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd1ea5c3-705c-4b0d-8a30-ffa99a50bc1a/all_american_pressure_canner_930.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ed315c9c-7247-4071-bdd1-d3c1571de23e/wofapozemites.pdfIn PDF document text
    • https://9db8f275-5044-409a-aa1b-3306d9dda9bd.filesusr.com/ugd/361f4b_0b94e99f503644979657c647ec5b6af8.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sewamos/zesetaguto.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_off0000ea4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA4F 5060 bytes
SHA-256: 9a8bbe04ad248a1575a80e3bc430e400d07001bf9884618c8cf7a54a5881e896
font_01_sfnt_off0000fb7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB7F 10800 bytes
SHA-256: dabf789321f0d41c85bd7ae2ecc074248c04adf9bc2b14a69e289b70d3062843

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