Malicious PDF — malware analysis report

Static analysis result for SHA-256 b89b726b12491c39…

MALICIOUS

PDF

126.3 KB Created: 2021-05-18 16:05:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: b153d21c8ebcc7d9464d4fc6658e1f5c SHA-1: 3e2e92e6240c489e7538c96106016716d5c4bf30 SHA-256: b89b726b12491c3985ff2d4c19bb7d153486cc69b5c28ea108c3809f41622d13
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The document contains numerous embedded links, many pointing to disposable hosting and employing UTM parameters, suggesting a link farm designed to redirect users to malicious sites. The presence of these links and the overall structure strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • 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://pelibifir.ru/strik?utm_term=pirates+of+the+caribbean+4+full+movie PDF link annotation
    • https://bezebaterizijir.weebly.com/uploads/1/3/1/3/131384714/8790836.pdfIn PDF document text
    • https://paleforekirito.weebly.com/uploads/1/3/4/5/134579508/vemimowefizabis.pdfIn PDF document text
    • https://nifirasevaxo.weebly.com/uploads/1/3/4/7/134756957/texepobateme.pdfIn PDF document text
    • https://nedovewa.weebly.com/uploads/1/3/5/3/135316636/revijoz_datijor_kulaze_wenapanuz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4466146/normal_5fc6018a94920.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366956/normal_604eb58fa24d5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491925/normal_6058e7386a202.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379611/normal_6020536ee862a.pdfIn PDF document text
    • http://vuzitofakomuj.22web.org/10050072877.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471455/normal_5ff07fee0f93f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374024/normal_5fca2e8b5d437.pdfIn PDF document text
    • http://furazuj.iblogger.org/kuvesurirukaregedolu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4372086/normal_6000ce4b8643b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393776/normal_5fe3125340a0d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://niwibobimitezof.epizy.com/the_size_of_each_exterior_angle_of_a_regular_polygon_is_18.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a8d2604b-caba-49c5-89b5-d42dd93b8ec4/32118313926.pdfIn PDF document text
    • http://dovelarewiju.epizy.com/ateten_gmlek_tahlil.pdfIn PDF document text
    • http://jiwepatifon.rf.gd/alistair_dragon_age_conversation_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3c77b8a3-f155-42ca-8368-4ed868a1d417/father_and_son_clothing_sets.pdfIn PDF document text
    • http://gesutebixip.epizy.com/13435511214.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8401b644-2dd6-465d-a5cb-c349dd24638c/piweza.pdfIn PDF document text
    • http://jipobemimojogot.rf.gd/wezakizar.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_off0001af26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1AF26 5408 bytes
SHA-256: e9c33784853dd526e89b4455eaae9c621bb21b832568ecbad48312e1029ce1b2
font_01_sfnt_off0001c172.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C172 13208 bytes
SHA-256: 921a580886be31bbab349c797a60bf1118e4f82c18bd551288d11a645059fcee

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