Malicious PDF — malware analysis report

Static analysis result for SHA-256 e734e9c86e7a5281…

MALICIOUS

PDF

68.3 KB Created: 2021-02-17 23:05:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 1a308a08286281ee700f27bc51d47313 SHA-1: 99a56854e5ded0693da4a2702f9cd479d04d83b3 SHA-256: e734e9c86e7a5281a47c527b37cc4bb48ef5ceb8ce402f31a6fa67a46fb68abb
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF file contains numerous external links, with one prominent link pointing to 'bologen.ru', disguised as a search result for pairing a Plantronics headset. This suggests a phishing or malware distribution attempt. The ClamAV detection and ML classifier strongly indicate malicious intent, likely involving exploitation or the delivery of a second-stage payload.

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://bologen.ru/aws?utm_term=how+to+pair+plantronics+headset+to+iphone+x PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4380230/normal_5fdc3d125d8b8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413563/normal_5fdc6b502e464.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444369/normal_60002beac6d23.pdfIn PDF document text
    • https://rifubagozoj.weebly.com/uploads/1/3/2/6/132695416/gabiv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470205/normal_6014d8d51a612.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384471/normal_5fdc4da1bd28a.pdfIn PDF document text
    • https://dawutika.weebly.com/uploads/1/3/1/4/131407504/6256527.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/tunenijexe/gametv_plus_cho_win_10.pdfIn PDF document text
    • https://s3.amazonaws.com/bisapovepizaj/43614443264.pdfIn PDF document text
    • https://s3.amazonaws.com/wuxupewu/aaj_tak_headlines_ringtone.pdfIn PDF document text
    • https://s3.amazonaws.com/tikofaketonub/7564550959.pdfIn PDF document text
    • https://s3.amazonaws.com/legenapi/mimobogezulujaxenomumobo.pdfIn PDF document text
    • https://s3.amazonaws.com/vixuwogetiv/vitomavuketuzudapi.pdfIn PDF document text
    • https://s3.amazonaws.com/kiwopusafize/81138134799.pdfIn PDF document text
    • https://s3.amazonaws.com/wunojipu/plano_callejero_bruselas.pdfIn PDF document text
    • https://s3.amazonaws.com/vuliwisuwig/flask_multiple_template_inheritance.pdfIn PDF document text
    • https://s3.amazonaws.com/gudukupir/bnz_mobile_app.pdfIn PDF document text
    • https://s3.amazonaws.com/wokesabisevo/american_college_of_cardiology_guidelines_2017.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_off0000cd32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD32 5284 bytes
SHA-256: de3040acbb0b6e1497db05eda4240e2f8e0a741bf9e944c883375e6bfe923215
font_01_sfnt_off0000df2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF2E 10812 bytes
SHA-256: 31b1453757d82d5be2a8d0d002afe233574ac38fe90ae66c28884c1be2061f2b

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