Malicious PDF — malware analysis report

Static analysis result for SHA-256 94256ed869b73653…

MALICIOUS

PDF

77.4 KB Created: 2021-04-03 11:34:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 526802a33bcfa66d6769078eda2bec05 SHA-1: 8e5ed69bc79a69f5c4274ec47d93a57bd0a6c817 SHA-256: 94256ed869b73653a6ea313b8dc89cc1f9d67efe355e22de33738b65df991041
186 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9991

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://soxebez.ru/strik?utm_term=how+to+cite+cdc+references+in+apa PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4444115/normal_60352beb49ebf.pdfIn PDF document text
    • https://morimisinasezub.weebly.com/uploads/1/3/1/8/131856414/4b221b882b689.pdfIn PDF document text
    • https://bexalasavego.weebly.com/uploads/1/3/4/6/134650617/4f51e.pdfIn PDF document text
    • https://zofazozudu.weebly.com/uploads/1/3/0/7/130739697/mizotefojiwezafuxef.pdfIn PDF document text
    • https://julupoberoraw.weebly.com/uploads/1/3/4/3/134353221/lavapefegudasedifo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495050/normal_5ffd257e59800.pdfIn PDF document text
    • http://robertferrell.net/56628926387jl27s.pdfIn PDF document text
    • https://luzulobopado.weebly.com/uploads/1/3/2/6/132681737/mogegajozi-jakaberemij-winaruzirajal.pdfIn PDF document text
    • https://jedidaril.weebly.com/uploads/1/3/4/6/134687024/4385848.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378153/normal_60144dc4d473f.pdfIn PDF document text
    • http://vvinorama.website/25333263769526ei.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420028/normal_606639e07cac8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415322/normal_60236af547396.pdfIn PDF document text
    • https://merasewutid.weebly.com/uploads/1/3/4/3/134348660/tafenutiwuto.pdfIn PDF document text
    • https://fiwerabonu.weebly.com/uploads/1/3/4/3/134347662/9400516.pdfIn PDF document text
    • http://zumodaronomana.iblogger.org/45661976189.pdfIn PDF document text
    • https://nerapusu.weebly.com/uploads/1/3/1/4/131438180/2435338.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jujabezemaluwe.rf.gd/proper_decline_cable_fly_form.pdfIn PDF document text
    • https://s3.amazonaws.com/jeromopelurab/vozuzajunatewojij.pdfIn PDF document text
    • https://s3.amazonaws.com/dumupa/vubapona.pdfIn PDF document text
    • http://dofumuligo.rf.gd/bimoliw.pdfIn PDF document text
    • https://s3.amazonaws.com/zatazewoz/amazon_kindle_for_windows_10.pdfIn PDF document text
    • https://s3.amazonaws.com/fumiposamisur/61696110600.pdfIn PDF document text
    • http://wazizofukukifog.epizy.com/fodezegik.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_off0000f0d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0D4 5172 bytes
SHA-256: f08352cd7fd6f6e5fd0f6dc47342652817bbfdfef9c3d5b78308eca9d0efe51a
font_01_sfnt_off0001028f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1028F 11060 bytes
SHA-256: 99ab722a66da50f3e898dedba838db64d8cfa34751c46ece011bd8495fc02f21

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