Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2b8190262170cb3…

MALICIOUS

PDF

70.3 KB Created: 2020-11-20 11:05:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: d657b5e01d6242ac18451f14b7b04947 SHA-1: 93e13840e686e1aad84a087bf5a9d72192baa268 SHA-256: b2b8190262170cb37fea5a19edf198fb78f588bcf09efacddb1eba2894237d94
222 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan threat. It contains a significant number of external links, many pointing to redirector infrastructure, suggesting a link farm designed to distribute malicious content. The presence of a 'download button' heuristic further supports a lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://traffine.ru/strik?utm_term=paper+roller+coaster+funnel+template In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366000/normal_5fb780163205a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422876/normal_5fb325f8e75ba.pdfIn PDF document text
    • https://pelixenebedevo.weebly.com/uploads/1/3/4/3/134338689/kivewisadapovixew.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389794/normal_5f95086fc396a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483837/normal_5fb297de99cd8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383703/normal_5f914ef3b35ef.pdfIn PDF document text
    • https://dejuxowiku.weebly.com/uploads/1/3/0/7/130738850/2816927.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/wuxupewu/ashirvad_upvc_pipes_catalogue.pdfIn PDF document text
    • https://s3.amazonaws.com/sedimeraxufi/camera_focus_test_chart.pdfIn PDF document text
    • https://s3.amazonaws.com/genedonapubefe/davv_cet_2019_online_registration_form.pdfIn PDF document text
    • https://s3.amazonaws.com/povodijirig/personal_anchor_system_with_sling.pdfIn PDF document text
    • https://s3.amazonaws.com/gavapozalilup/52045730093.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_off0000d6aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6AA 5164 bytes
SHA-256: 59ab9c6577680bd9416c31670e4d10ea1238db9ab90e0f62f55c97f1cf6d7394
font_01_sfnt_off0000e824.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE824 10568 bytes
SHA-256: eb49d991c0d8823be417a6fc7cc87087583038ae6e1e54e0805a4df3d7d992b3

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