Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9add4415b24a16f…

MALICIOUS

PDF

81.1 KB Created: 2021-06-02 17:36:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: ec04ee3094a4b5c716a6010671e55f62 SHA-1: 743f42af29b974f9af5b37b630afb66588723177 SHA-256: e9add4415b24a16f5cf153a739961bc5696f1a51c577ef57a2e6b83b3e607e0f
194 Risk Score

Malware Insights

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

This PDF was flagged by multiple heuristics and a machine learning classifier as malicious, specifically for brand-impersonation credential phishing targeting Amazon. It contains numerous external URIs, many pointing to disposable hosting, suggesting a link farm designed to obscure the ultimate phishing destination. The presence of embedded URLs and the overall structure strongly indicate a phishing attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 7

  • 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://kosazuritejozu.weebly.com/uploads/1/3/0/8/130874521/7596445.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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://smidgel.ru/pbw?utm_term=black+knight+price PDF link annotation
    • https://static.s123-cdn-static-d.com/uploads/4478655/normal_60b43226d9210.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4394073/normal_5fedec9cb3805.pdfIn PDF document text
    • https://kosazuritejozu.weebly.com/uploads/1/3/0/8/130874521/7596445.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454820/normal_6006637812520.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4531626/normal_6067945aa3c10.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453579/normal_6007fe3db2538.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450249/normal_602090854b284.pdfIn PDF document text
    • https://moxudoged.weebly.com/uploads/1/3/3/9/133999753/rafefe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370744/normal_6063fee49a779.pdfIn PDF document text
    • https://warogowi.weebly.com/uploads/1/3/1/6/131606132/a0bdb3206ae2be9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446377/normal_60148b6198926.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423427/normal_602a4fc370ebd.pdfIn PDF document text
    • https://xoxigukot.weebly.com/uploads/1/3/4/8/134861038/1002346.pdfIn PDF document text
    • https://gumulopeviw.weebly.com/uploads/1/3/5/3/135348062/06eaf6b08ad584.pdfIn PDF document text
    • https://telenegogak.weebly.com/uploads/1/3/4/5/134522167/tugepav-lujokepovebofow-kopipogadokusi.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
    • http://povelin.pbworks.com/w/file/fetch/144423357/engineering_drawing_text_book.pdfIn PDF document text
    • http://luwivaj.pbworks.com/f/client_satisfaction_survey_template_free.pdfIn PDF document text
    • http://vakerul.pbworks.com/w/file/fetch/144505905/neruwivuvemig.pdfIn PDF document text
    • http://kukepofarit.pbworks.com/w/file/fetch/144470433/how_to_apply_online_for_capitec_jobs.pdfIn PDF document text
    • http://mepijewaj.pbworks.com/w/file/fetch/144426699/batutuzerogojide.pdfIn PDF document text
    • http://letonepamusi.pbworks.com/w/file/fetch/144435297/how_many_chapters_are_in_diary_of_a_wimpy_kid_wrecking_ball.pdfIn PDF document text
    • http://vimadutukad.pbworks.com/w/file/fetch/144480165/jored.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_off0000f153.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF153 4808 bytes
SHA-256: 86e683236df0b358a55262a675b633a8777e58b313b7d6264180a34c21a2473f
font_01_sfnt_off00010197.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10197 11424 bytes
SHA-256: 23ab5bc251f9fce1feec368ce35af945655d93d3e680e64935f82c66a38d812b
font_02_sfnt_off000128af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128AF 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34