Malicious PDF — malware analysis report

Static analysis result for SHA-256 b764ba5f4e63338d…

MALICIOUS

PDF

77.8 KB Created: 2020-12-15 05:16:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: ca27a399d5ee5387a28d6aa3ac2acba8 SHA-1: 1f3fce1e046ad2a276d917483d885e553996c29a SHA-256: b764ba5f4e63338d5aff6bafceb4bd07ad56545f2a49eff4c81a608625645250
164 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses an urgency-based lure. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://trafftec.ru/123?utm_term=dragon+mania+legends+food+guide PDF link annotation
    • https://nunoperiv.weebly.com/uploads/1/3/1/8/131856708/13299eaab9a.pdfIn PDF document text
    • https://xinusikavafomi.weebly.com/uploads/1/3/4/3/134353784/7047379.pdfIn PDF document text
    • https://vumifedesonuzik.weebly.com/uploads/1/3/4/8/134849268/4360359.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374545/normal_5f94468b1d75e.pdfIn PDF document text
    • https://jogapemufa.weebly.com/uploads/1/3/4/4/134492880/9191366.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367940/normal_5f888e8a116ac.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458852/normal_5fa460ff84476.pdfIn PDF document text
    • https://litoxixolemor.weebly.com/uploads/1/3/4/3/134379235/51b1ba076fdef.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/tutapaxi/love_you_to_death_parents_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/liguwubore/warner_bros_company_information.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb0f0e1f-ebae-4016-8db2-64985b2e5af2/23562781539.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fce1b29cd8500165ad4a92d/t/5fd707cfc4373837b9220c48/1607927760300/forged_anvil_character_sheet_5e.pdfIn PDF document text
    • https://s3.amazonaws.com/gixirojozogufux/34054013817.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc016b9c30a162e0c4e17a3/t/5fc8a24ab0f45b2a3d2a442a/1606984270996/tiduvebipovezonusawusana.pdfIn PDF document text
    • https://s3.amazonaws.com/wazotojemov/adverbs_worksheets_grade_2.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_off0000f427.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF427 5228 bytes
SHA-256: ab0dd5b399a8a4bb7e0e0445b535d348e0dd04e41e6a5a7de5259c62fe78aee4
font_01_sfnt_off000105df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105DF 10588 bytes
SHA-256: 455e451ce903002f764c4ff04b271c4192dca6385058a77c08c8c89f46519d12

Open this report in the interactive analyzer, or submit your own file for analysis.