Malicious PDF — malware analysis report

Static analysis result for SHA-256 972cadff4a9bd7e8…

MALICIOUS

PDF

94.4 KB Created: 2021-02-15 14:16:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 06312c0e59c20646ef5399a55411e552 SHA-1: f405c93562f07ffbc6b70e748127587e0fd92f6b SHA-256: 972cadff4a9bd7e8f47a4ad6a213d9cf8e80b6ccbd3f477abf50e9bbdfda6e56
246 Risk Score

Malware Insights

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

This PDF document was flagged by multiple heuristics as malicious, including a critical finding for brand-impersonation credential phishing targeting Outlook. The document contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to obscure the final destination. One of the primary URLs identified is a redirector hosted on 'weebly.com', which likely leads to a credential harvesting page.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://satufimitu.weebly.com/uploads/1/3/4/7/134715308/dokeweluwu-goxofa-lidaza-dejop.pdf.
  • 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.
  • 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://maypoin.ru/strik?utm_term=what+is+the+wsj+prime+rate+now+2020 PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4481990/normal_5fc83dc673e78.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408172/normal_5fe2624d4706a.pdfIn PDF document text
    • https://satufimitu.weebly.com/uploads/1/3/4/7/134715308/dokeweluwu-goxofa-lidaza-dejop.pdfIn PDF document text
    • https://cdn.sqhk.co/tefazaturar/phduYhc/the_conquest_of_bread_audiobook_free.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4405443/normal_5ff289b392ccf.pdfIn PDF document text
    • https://janirakuvofubej.weebly.com/uploads/1/3/4/7/134734148/dd061a26.pdfIn PDF document text
    • https://cdn.sqhk.co/pixafosabow/8lN6EGJ/keroxemuvutibunex.pdfIn PDF document text
    • https://bekariniwoxisit.weebly.com/uploads/1/3/2/7/132710774/giwago.pdfIn PDF document text
    • https://mepodatadun.weebly.com/uploads/1/3/1/4/131452799/0c76405ad80.pdfIn PDF document text
    • https://pakimisubimoge.weebly.com/uploads/1/3/0/7/130776027/56cd9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405651/normal_6019c67704eeb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://favavobebin.epizy.com/structural_basin_landform_definition.pdfIn PDF document text
    • http://rajiwewovipu.epizy.com/bp_reference_standards_coa.pdfIn PDF document text
    • http://favukimasinete.rf.gd/angiomatous_malformation_definition.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_off00013168.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13168 5484 bytes
SHA-256: 8ff8cd25d5ee4b5aec5663faa5b115d4b1c8a90216df178851c00654885d511e
font_01_sfnt_off000143fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x143FD 12700 bytes
SHA-256: 06203849c0a6e2d44155d06e8733a0ece69c006ff784da62dee133cd350d57a8

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