Malicious PDF — malware analysis report

Static analysis result for SHA-256 e628292d75c2d6be…

MALICIOUS

PDF

95.9 KB Created: 2020-12-14 22:22:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: b3b417476c84cea09ad9115a3f5f0927 SHA-1: f273ef2f01e1e2e003362cd1af136fb6bd42456f SHA-256: e628292d75c2d6be2946b6249c5f51daa3b7b37614cbcc5b37f8043f8c800b35
214 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical finding for linking to known malicious redirector infrastructure. The file contains a large number of embedded links, many of which point to external PDF files, suggesting a link farm or redirection scheme. The ClamAV detection and ML classifier further support its malicious nature, indicating it is likely a phishing or trojan delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • 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://traffking.ru/aws?utm_term=bosonic+conformal+field+theory In PDF document text
    • https://static.s123-cdn-static.com/uploads/4407060/normal_5fd04bca231ce.pdfIn PDF document text
    • https://sivusemekatew.weebly.com/uploads/1/3/4/4/134491367/edb500cc8f7bb.pdfIn PDF document text
    • https://fapifejoj.weebly.com/uploads/1/3/4/2/134265577/butov.pdfIn PDF document text
    • https://kujuxase.weebly.com/uploads/1/3/4/5/134584075/tegimaxexugim_mimadepar_punopa_weturezij.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461211/normal_5fa6f36a8e0fa.pdfIn PDF document text
    • https://fuwozubasuzej.weebly.com/uploads/1/3/4/4/134473550/sarukarojisudof_gutiwawokokif.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494674/normal_5fab9812d9333.pdfIn PDF document text
    • https://kupanonul.weebly.com/uploads/1/3/4/6/134682697/duvijodetan.pdfIn PDF document text
    • https://nudegono.weebly.com/uploads/1/3/4/6/134682657/sedevuwolakezenipoji.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/5fc72bd50d716e027b02a770/t/5fcd84ebc00f007ceaffcaa5/1607304436661/fobutaxarimum.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf63b4173fb5383b9a37cc/1606378420989/weider_x_factor_for_sale.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc58b6c2cf09257bd8b11cb/t/5fd14a830a62a1509faab032/1607551619345/war_games_conquer_the_world.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5268be9fc3622d53d9466/t/5fc6a7e561e25426e122a6f9/1606854630615/lithium_18650_flat_top_rechargeable_batteries.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0e70d1452f90b7fe56088/t/5fcf7017505b451de18d68d1/1607430168386/galaxy_warranty_time.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011b3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B3E 5412 bytes
SHA-256: 724ea90e4f604995459706635d410c284e0e61572dc262902b76350d7472da6a
font_01_sfnt_off00012d7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D7D 13144 bytes
SHA-256: b0ee8610f5885853fcfaf386ae1f2dcd9a5c6c571bfb84ba16e38922d9cab077
font_02_sfnt_off0001597c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1597C 17044 bytes
SHA-256: ae8eb8c4dcd98f1cdfad3c79fd83934cbaff80a29bba2f165c29185a26859d53

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