Malicious PDF — malware analysis report

Static analysis result for SHA-256 3eb946ddcd1ebe06…

MALICIOUS

PDF

65.8 KB Created: 2021-02-22 07:13:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: d8aa6b814ba3c5bd5c5a4c5ec515881f SHA-1: 26b79176d0291a75f5fe17124d824313586b64d5 SHA-256: 3eb946ddcd1ebe06a7aed3ca26846b48340cbfa53aee067e50844c6cd8cf099d
126 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with one specifically pointing to a URL containing 'strik' and a search term related to a floor safe reset code, suggesting a phishing or scam attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a malicious document, likely delivered via spearphishing.

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
  • 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://bologen.ru/strik?utm_term=bunker+hill+digital+floor+safe+reset+code PDF link annotation
    • https://nosovaranipad.weebly.com/uploads/1/3/4/7/134743093/fd657cd6af6f6e4.pdfIn PDF document text
    • https://wisejagu.weebly.com/uploads/1/3/4/8/134881465/5350291.pdfIn PDF document text
    • https://kumobavogi.weebly.com/uploads/1/3/2/3/132303339/gapebamomelobezirex.pdfIn PDF document text
    • https://gedarimetesuja.weebly.com/uploads/1/3/1/3/131398281/felux-kemidesis.pdfIn PDF document text
    • https://vexixizeled.weebly.com/uploads/1/3/1/3/131384380/xonis.pdfIn PDF document text
    • https://wajifisawebe.weebly.com/uploads/1/3/4/4/134480175/zibawuvonuguto.pdfIn PDF document text
    • http://sesaxojatox.iblogger.org/maytag_2000_series_washer_error_code_lf.pdfIn PDF document text
    • https://pawikewam.weebly.com/uploads/1/3/4/4/134445239/5490968.pdfIn PDF document text
    • https://kunexiravirub.weebly.com/uploads/1/3/5/3/135344507/4bd3b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://valamujunitun.epizy.com/are_any_nail_salons_open_near_me.pdfIn PDF document text
    • http://welegem.epizy.com/metformina_en_ingles.pdfIn PDF document text
    • http://kusofiwu.epizy.com/73423573086.pdfIn PDF document text
    • https://s3.amazonaws.com/zibenoroduzuw/whirlpool_dishwasher_wdf320pads1_not_washing.pdfIn PDF document text
    • http://darozux.epizy.com/answers_in_genesis_vbs_2018.pdfIn PDF document text
    • http://matufuw.rf.gd/assessment_form_template.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_off0000c46b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC46B 5396 bytes
SHA-256: 50d4952abb57d08532073d8dc8de7367fadb251b2435f29e006197272edb1b92
font_01_sfnt_off0000d6cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6CD 9844 bytes
SHA-256: c49bfece9a4c7c2cca72ef35ad02768ff09fa02378d8dba513f2f8af3f363037

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