Malicious PDF — malware analysis report

Static analysis result for SHA-256 e55954f2e6e2436c…

MALICIOUS

PDF

69.1 KB Created: 2021-02-06 13:36:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: b90d856efde5dae6e26417a8a24a053b SHA-1: 02d11b1db8373a76e893372f5d0da31d17b02001 SHA-256: e55954f2e6e2436c5e1cfeca5accfed85a2eb917c83f474f916e9d5eeb540e95
184 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by multiple heuristics and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links to external websites, many of which are hosted on disposable domains and known redirectors, suggesting a phishing or malware distribution scheme. The presence of embedded URLs and the document's structure point towards an attempt to trick users into visiting these malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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 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.
  • 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://yafferge.ru/aws?utm_term=asterix+obelix+game+1996 In PDF document text
    • http://xapozibun.22web.org/rokazawomamaz.pdfIn PDF document text
    • https://monokuzofo.weebly.com/uploads/1/3/2/7/132741222/lizazofufag_dibanuruneviwi.pdfIn PDF document text
    • http://geesecam.com/lettre_d_amour_de_0_C3A0_10uks5c.pdfIn PDF document text
    • http://domensita.fun/discrete_and_combinatorial_mathemati1sqs9.pdfIn PDF document text
    • https://goradexajegofip.weebly.com/uploads/1/3/0/8/130874122/ginuganesadol.pdfIn PDF document text
    • http://nogivubuleduwi.22web.org/gartner_magic_quadrant_siem_report.pdfIn PDF document text
    • https://lurevovikofa.weebly.com/uploads/1/3/4/6/134693735/219710fcd8fce.pdfIn PDF document text
    • https://zokofefedepop.weebly.com/uploads/1/3/1/4/131437243/dusekiwefiko-zuvega.pdfIn PDF document text
    • http://webdefilmizle.com/xenopetctjl.pdfIn PDF document text
    • http://damvglaz0.xyz/1989_mazda_b2200_workshop_manualhani4.pdfIn PDF document text
    • http://creamwalls.online/descargar_gratis_diccionario_biblico_ilustrado_holman_en4kwqj.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/fejatepudopito/90701406277.pdfIn PDF document text
    • https://s3.amazonaws.com/bulolimepol/antivirus_kaspersky_free.pdfIn PDF document text
    • http://difugarulid.epizy.com/decursive_addon_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/rodigapigeta/dividend_paid_under_balance_sheet.pdfIn PDF document text
    • http://bupujipa.epizy.com/sample_incident_accident_report_form.pdfIn PDF document text
    • http://juzefabamurever.rf.gd/gisumimokofuvonese.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_off0000d037.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD037 5564 bytes
SHA-256: 2198434dff671b61a1b4f17e50a1d69e624919dedf87594a98d5c4d7be5ca1e7
font_01_sfnt_off0000e318.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE318 10776 bytes
SHA-256: e9f870ba93d7f6c66a314da41c4e296f1a6288620bb5ee8b875a8a7bb8a31b36

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