Malicious PDF — malware analysis report

Static analysis result for SHA-256 0de0e583ff33cc50…

MALICIOUS

PDF

44.0 KB Created: 2020-07-09 16:49:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 78a8a5d79d4b00b80b7f121b69533425 SHA-1: 8acae31213e17b4349682174ec381d0f763e76f8 SHA-256: 0de0e583ff33cc50497ebb91bbac0ddd67d45d590d545551bfc953b52586255d
214 Risk Score

Malware Insights

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

This PDF document contains numerous links, including one disguised as a manual for a 'Singer facilita pro 2968 manual' that redirects to a malicious URL. The presence of a PDF redirector link and a large number of external links suggests a link farm or phishing attempt. ClamAV detection as Pdf.Dropper.Agent-9226105-0 further confirms its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • ClamAV: Pdf.Dropper.Agent-9226105-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-9226105-0
  • 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://ttraff.cc/wb?keyword=singer%20facilita%20pro%202968%20manual
    • http://files.well-estar.com/uploads/1/3/1/6/131637034/91a0067.pdf
    • http://files.snohomishvalleyicerink.com/uploads/1/3/1/3/131379320/pubeva-menizekij-patawotosaxos-zagepegimuxed.pdf
    • http://files.bangkokfloatcenter.com/uploads/1/3/0/7/130739251/dofusoderefiponadogi.pdf
    • http://files.renuchaudhary.com/uploads/1/3/0/9/130969992/madoke_govivapezuku.pdf
    • http://files.manuahealthcare.org/uploads/1/3/1/4/131407281/cffdc39961db4e.pdf
    • http://files.lakeridgecheer.com/uploads/1/3/0/7/130740087/9ef5e.pdf
    • http://files.acmechassisfactory.com/uploads/1/3/1/8/131856844/tigejukizogutogeb.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://ginirosidu.files.wordpress.com/2020/06/30276178428.pdf
    • https://filokexepizi.files.wordpress.com/2020/06/bizurufofezilatufe.pdf
    • https://fewofeziv.files.wordpress.com/2020/06/54316499027.pdf
    • https://renapiros.files.wordpress.com/2020/07/bepikuve.pdf
    • https://zabalojiji.files.wordpress.com/2020/06/sidizese.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/benubojebexoreloruva.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/78491346320.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/lufixupiz.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/61066914906.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006067.bin
886d3003db9293096f30d5db2e82da04f71239af0ca50d889d7abb91e38a5821		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6067 5776 bytes
font_01_sfnt_off000073e6.bin
f8a6073baec4f4860e2efe009aa3a5c045706fba073f1aec25c9f44b2aa27540		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73E6 15992 bytes

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