Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1747dfde88ffe85…

MALICIOUS

PDF

82.5 KB Created: 2021-05-25 04:06:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: e4262614ee12bcf8612a37d7c689d6b8 SHA-1: 58f00ac14139ac81e706240e3c6004e892336aa4 SHA-256: e1747dfde88ffe85f4e2ae4bfafeace04a2e79ea2e7011aca934e9fec8fe5af0
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://seumenha.ru/strik?utm_term=integrated+crop+management+plan+template PDF link annotation
    • https://lejumapufa.weebly.com/uploads/1/3/4/6/134688193/revudagufifuzub_sizinumofexi_kadonivosudatel.pdfIn PDF document text
    • https://virefogagivagu.weebly.com/uploads/1/3/0/8/130815228/892cb642f.pdfIn PDF document text
    • https://fiwenozagor.weebly.com/uploads/1/3/4/3/134363395/zagutodo-jinaxojizu.pdfIn PDF document text
    • https://xanosetad.weebly.com/uploads/1/3/1/1/131163691/xovafixivok.pdfIn PDF document text
    • https://naziwimirup.weebly.com/uploads/1/3/4/3/134371197/kogivadax.pdfIn PDF document text
    • https://parafobosa.weebly.com/uploads/1/3/1/8/131857791/rovojutoruxugojoji.pdfIn PDF document text
    • https://wipabobape.weebly.com/uploads/1/3/5/9/135985954/44bd1f99a82400.pdfIn PDF document text
    • https://tebukebodo.weebly.com/uploads/1/3/1/3/131381901/7077850.pdfIn PDF document text
    • https://pusakinadolelu.weebly.com/uploads/1/3/2/6/132682110/2f587.pdfIn PDF document text
    • https://mowazaxof.weebly.com/uploads/1/3/4/7/134704653/8591716.pdfIn PDF document text
    • https://niwarixetawozav.weebly.com/uploads/1/3/4/1/134108921/logezowijesudox-mozibikapa.pdfIn PDF document text
    • https://razitesewiwi.weebly.com/uploads/1/3/2/8/132815022/c6b7bb44.pdfIn PDF document text
    • https://liwufodabex.weebly.com/uploads/1/3/4/8/134872973/8260490.pdfIn PDF document text
    • https://xetakafiso.weebly.com/uploads/1/3/1/8/131856826/09bb4bdf8d98e95.pdfIn PDF document text
    • https://vijekufimukij.weebly.com/uploads/1/3/0/9/130969895/romuwinaxemexax.pdfIn PDF document text
    • https://todilotifobaw.weebly.com/uploads/1/3/2/7/132712516/f7e426d28f0d.pdfIn PDF document text
    • https://pinobuni.weebly.com/uploads/1/3/0/9/130969003/jofodomepedenek.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/bifadiwuwileji/adobe_creative_cloud_for_teams.pdfIn PDF document text
    • https://s3.amazonaws.com/paropabaru/6664833564.pdfIn PDF document text
    • https://s3.amazonaws.com/xezonijida/kenmore_elite_model_795_water_filter.pdfIn PDF document text
    • https://s3.amazonaws.com/jifesu/asos_size_guide_uk_jeans.pdfIn PDF document text
    • https://s3.amazonaws.com/fizup/wondershare_filmora_crack_for_android.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_off00010655.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10655 5152 bytes
SHA-256: ed874f706f7a0ebb0119b68d6c125fbb99e196309a2fef7f5cb13737c8fa899c
font_01_sfnt_off000117c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117C9 10656 bytes
SHA-256: a2c75695f9328c20f58d3cfb4156d1174620c769d5595de7d21f346b2fc8f9e5

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