Malicious PDF — malware analysis report

Static analysis result for SHA-256 8401dc0e5892966a…

MALICIOUS

PDF

72.3 KB Created: 2021-03-20 02:42:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: a5951bf99e73203094bd8053fc5099fd SHA-1: b133e0492e575223eae8865f8d7cb0e6df76cfeb SHA-256: 8401dc0e5892966af0e74870731e20b18e07e8483ed64c0e297316625b9f7542
186 Risk Score

Malware Insights

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

The sample is a PDF document flagged by multiple heuristics as malicious, including brand-impersonation credential phishing and a ML classifier indicating high maliciousness. It contains numerous external URIs, several of which point to disposable hosting and redirectors, suggesting a phishing campaign. The presence of embedded URLs and the overall structure indicate an attempt to deliver a phishing lure, likely via spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://xobopeta.weebly.com/uploads/1/3/0/7/130739243/ledanaxatuz.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://soxebez.ru/strik?utm_term=does+uracil+replace+thymine PDF link annotation
    • https://cdn.sqhk.co/savunowudob/jgDcgee/custom_engraved_cast_iron_skillet.pdfIn PDF document text
    • http://zasasibibo.iblogger.org/16700200431.pdfIn PDF document text
    • https://xobopeta.weebly.com/uploads/1/3/0/7/130739243/ledanaxatuz.pdfIn PDF document text
    • https://cdn.sqhk.co/xeviremal/jjhii0N/thorogood_slip_on_boots_near_me.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477635/normal_5fe7703fd37b5.pdfIn PDF document text
    • http://lisujaden.22web.org/lemugotunofegoxazazosipu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378153/normal_604caabb525ac.pdfIn PDF document text
    • https://cdn.sqhk.co/bexefoboxevi/chh7Qjj/birineganobidozanukexixu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dopovis.myartsonline.com/70407578569.pdfIn PDF document text
    • https://aed022ca-8a9d-452d-9022-56a74a585a14.filesusr.com/ugd/4d548e_7da512e770084c168d55d16827585ce6.pdf?index=trueIn PDF document text
    • http://xukokumo.myartsonline.com/vixexodukufu.pdfIn PDF document text
    • http://jominata.rf.gd/local_guides_community.pdfIn PDF document text
    • https://7605d98d-8b17-4a41-9383-f5c8d5af9bcc.filesusr.com/ugd/2bed4c_e8ade80716cf4ed9b55ee2d7d14a5ec0.pdf?index=trueIn PDF document text
    • http://telebil.rf.gd/natiselegunit.pdfIn PDF document text
    • http://dosidojabar.epizy.com/consumer_reports_customer_phone_number.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_off0000db92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB92 5272 bytes
SHA-256: de6184cd84fdd3af1512e0f2b23350a4a805fc42bc90f9d2a41a05bac2ebc712
font_01_sfnt_off0000ed66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED66 11516 bytes
SHA-256: 1a26a02e9e5fa43e1ef5e85242b0229284b2217579b98bcbe02d9dfe50bb3c0e

Open this report in the interactive analyzer, or submit your own file for analysis.