Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6503537b513246b…

MALICIOUS

PDF

70.1 KB Created: 2020-12-10 04:31:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: b448171e13d4f33d1c35eb052d966b01 SHA-1: d851ae5cef60aaabd0a5cd42be9b6de00312409b SHA-256: e6503537b513246b98c3558bf09c4afdb7414397ef6ac11f85b08da9cd5d54ef
314 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged as malicious by multiple heuristics, including ML classification and ClamAV. It contains a lure related to payment redirection and brand impersonation, specifically targeting Barclays. The embedded links point to known malicious redirector infrastructure, suggesting an attempt to phish for credentials or redirect users to further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://xamaboku.weebly.com/uploads/1/3/4/6/134606559/rubekamopoput-tapamigo-zisezuf.pdf.
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • 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://gettraff.ru/strik?utm_term=for+which+item+below+might+a+bank+issue+a+credit+memorandum+to+a+depositor%2527s+account%253F In PDF document text
    • https://xamaboku.weebly.com/uploads/1/3/4/6/134606559/rubekamopoput-tapamigo-zisezuf.pdfIn PDF document text
    • https://pekedilude.weebly.com/uploads/1/3/4/3/134324883/zowomemozuverafor.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc3c655d26ff1194f85c811/t/5fc446fd2dd96f59187593b0/1606698750831/95199612631.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbfd6e2c6d96458361c2338/t/5fc1fb372dd96f591834fbdd/1606548279550/darth_phobos_figure.pdfIn PDF document text
    • https://s3.amazonaws.com/betefowubevat/69958498860.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf4b08145a8629dca72e62/1606372104673/tudakezuxupizunebisolujo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b29a0350-681f-43db-b348-85459b3a0bfc/tetulewip.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc58aea2e34347c7063de36/t/5fc78090c7c45a5eafa8ac43/1606910097152/moon_patrol_atari_st.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/20794569-1535-496c-85f7-ffc54e334c26/tevupug.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe1a3a9b1ed03538a304a6/1606294075860/free_ultimate_book_of_card_games.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d24e38b4-4519-46f5-89d5-c3f274061e1b/lena_valenti_livros.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/23f91cba-c1ef-4ab2-b48a-00f188dde0c3/big_joe_milano_bean_bag_chair_cover.pdfIn PDF document text
    • https://s3.amazonaws.com/bugutaj/xikinimezage.pdfIn PDF document text
    • https://s3.amazonaws.com/sojuravewi/regulatory_compliance_policy_template_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/wusone/13458342158.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_off0000d382.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD382 5912 bytes
SHA-256: 803889b037c87aed264b8189c93271b24500253dd815e1ad24a07d834e5cb350
font_01_sfnt_off0000e791.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE791 10248 bytes
SHA-256: 164ed8c965fb5bff8c3e50f7f4ac00d190c1754ca7ad89614ef8e29d245288bc

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