Malicious PDF — malware analysis report

Static analysis result for SHA-256 da883c7647c1babf…

MALICIOUS

PDF

68.4 KB Created: 2020-12-17 10:28:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: db24a80a3c8311921f2751ada5b1a150 SHA-1: 084529539fb57599806bc7bcc736f6131efa8d1d SHA-256: da883c7647c1babffb76e2f8eafb8d0cec6a3f1c234ecfa157e7c2db971cc68b
96 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier, with a high risk score. It contains an embedded URL pointing to 'traffset.ru', which is likely used for phishing or to download a secondary payload. The document body, though heavily obfuscated, suggests a lure related to a 'size chart', aligning with common phishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://traffset.ru/123?utm_term=old+navy+sweetheart+jeans+size+chart PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4376856/normal_5fac50ec6e4f5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4372960/normal_5fcf97eee3721.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480585/normal_5fab115e10ead.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391308/normal_5f90e378f174c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414335/normal_5fa8a7f7901e1.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/xelimewat/fonts_online_free_copy_and_paste.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc109232cf09257bd6ccb44/t/5fc5c2a39ee0f32b871b434c/1606795939953/25336955154.pdfIn PDF document text
    • https://s3.amazonaws.com/jusagi/votiwuraduselelamigijam.pdfIn PDF document text
    • https://s3.amazonaws.com/memul/gupudelixivalojadipoxoje.pdfIn PDF document text
    • https://s3.amazonaws.com/pipaneku/fiber_cement_sheet_machine.pdfIn PDF document text
    • https://s3.amazonaws.com/wogikokuzotaxa/fojaluxalepikejasumuk.pdfIn PDF document text
    • https://s3.amazonaws.com/vudivuzakal/fixed_orthodontic_appliances_a_practical_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/susopuzupure/electron_configuration_chart_spdf.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_off0000cda6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDA6 5436 bytes
SHA-256: 2ee1cda8772ad05883fcbd388433bfdc439c9feba7dd4f62a994fc9da272c907
font_01_sfnt_off0000e03f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE03F 10644 bytes
SHA-256: 8bfc548cb4e12d2c691c59d2dcd5d18ede295edec8127cb9378b4c7e3bcc8ae3

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