Malicious PDF — malware analysis report

Static analysis result for SHA-256 463443c2c91d67d4…

MALICIOUS

PDF

117.9 KB Created: 2020-11-25 12:07:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 3297046cff14dd51f09cd143c8b3838a SHA-1: 7156f82f92c7e451158fdb36cfc06c49ad537614 SHA-256: 463443c2c91d67d4c8b4f40c0597e008622e8bdbfe4acdcd731be179b6c77071
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file was identified as malicious by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan' and an ML classifier. It contains a large number of external links, indicating it functions as a link farm. The primary malicious URL identified is https://trafffi.ru/strik?utm_term=lets+fall+in+love+for+the+night+chords, which is likely used for phishing or to direct traffic to malicious content.

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://trafffi.ru/strik?utm_term=lets+fall+in+love+for+the+night+chords PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4383806/normal_5f964d2b0efb8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447450/normal_5fb8855b34c67.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426425/normal_5fa527fb47a95.pdfIn PDF document text
    • https://xotiroxo.weebly.com/uploads/1/3/0/7/130776105/batija_liforabomudojox_lisogamiviribu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366405/normal_5fadc2547f148.pdfIn PDF document text
    • https://jarofudi.weebly.com/uploads/1/3/1/4/131408364/a7dcbcbb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403429/normal_5f9cb55b39052.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368750/normal_5fb534b99d7e8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369141/normal_5f9f367420bb1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367305/normal_5fafe248dfa0d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366306/normal_5f8a2c05ea676.pdfIn PDF document text
    • https://xojerajap.weebly.com/uploads/1/3/1/3/131384359/lefuneni.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/vavejijitatofu/traffic_report_m1_northampton.pdfIn PDF document text
    • https://s3.amazonaws.com/jutenojamega/navosirozutel.pdfIn PDF document text
    • https://s3.amazonaws.com/tadovu/pimab.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_off000192ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x192EE 5284 bytes
SHA-256: b434eb8c5d99a2daf53257815fe3a4ce1b1e76daf43ce94daad71ef793e37303
font_01_sfnt_off0001a4e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A4E9 11288 bytes
SHA-256: f4dc0162b8bcf3ead3646390d5c854375ee593a71c8b27847ea3ac1fb68881d8

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