Malicious PDF — malware analysis report

Static analysis result for SHA-256 457210fc34cc6279…

MALICIOUS

PDF

72.8 KB Created: 2020-12-16 21:52:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 0a6e23af32ae0eb4dcc57f37f0655c72 SHA-1: 2157a631e80c71a1141c33bc6c4cba251549b2ec SHA-256: 457210fc34cc6279de93bf18733775713e6c60ea1ef47f4b74f67a88969e2f26
184 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier, exhibiting critical heuristic firings for malicious redirector links. The embedded links, such as 'https://ggtraff.ru/strik?utm_term=problem+2.3+scale+factors+answers', point to known malicious infrastructure, suggesting an attempt to lure users to phishing or malware distribution sites. The document's structure and numerous links on disposable hosting further support a malicious intent, likely related to phishing or scamming.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://ggtraff.ru/strik?utm_term=problem+2.3+scale+factors+answers In PDF document text
    • https://cdn-cms.f-static.net/uploads/4416921/normal_5fb5b68eedd99.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456379/normal_5fb28919b80fa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374956/normal_5fcd07e52de03.pdfIn PDF document text
    • https://zanasebumafuwaj.weebly.com/uploads/1/3/4/8/134899829/zonidabo-sofojeteku.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480590/normal_5fd17ae4bd291.pdfIn PDF document text
    • https://xataramev.weebly.com/uploads/1/3/4/3/134320843/bedijenutowulixa.pdfIn PDF document text
    • https://dotigima.weebly.com/uploads/1/3/4/4/134404546/7884356.pdfIn PDF document text
    • https://jivexine.weebly.com/uploads/1/3/1/3/131380908/gipuvuku.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/ruzaganog/antiemticos_farmacologia.pdfIn PDF document text
    • https://s3.amazonaws.com/jenagubadopi/calvin_and_hobbes_all_books.pdfIn PDF document text
    • https://s3.amazonaws.com/xoxaneral/bubodowagajozazokivigiki.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc77919feeefa0c0b621f1f/t/5fd626b3b1c3f31c7a79dda1/1607870132610/auto1_group_gmbh_annual_report.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf4cabbc819f1cf4cee27c/1606372525163/60042425458.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d2ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2FF 5328 bytes
SHA-256: 691dd6fa1d029d493edcc51e6bc38731bb62c58add66b6594b5278ea359b1eac
font_01_sfnt_off0000e504.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE504 10420 bytes
SHA-256: 369bcd4e87ae0ad27b0f83991b7fc8353ecae949d25f07c1a3c58c691c07e3ee
font_02_sfnt_off0001081e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1081E 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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