Malicious PDF — malware analysis report

Static analysis result for SHA-256 472c96dc5c3f36d9…

MALICIOUS

PDF

83.3 KB Created: 2021-03-04 08:47:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 8c89ad7891775b7ed977e1e382a50152 SHA-1: 8905be756ad0686a5d5c29ddf7ce2377820a1675 SHA-256: 472c96dc5c3f36d9360c8e30e6771476046ec7b6ed1df50c81e9a83e44844d67
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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 PDF contains numerous embedded URLs, many pointing to disposable hosting, suggesting a link farm or phishing operation. The primary URL, 'https://baarspo.ru/strik?utm_term=factorytalk+view+se+to+me+conversion', is likely the intended destination for the user, aiming to trick them into clicking through.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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://baarspo.ru/strik?utm_term=factorytalk+view+se+to+me+conversion PDF link annotation
    • http://zolekumosex.iblogger.org/10075536924.pdfIn PDF document text
    • http://wotidoteked.mywebcommunity.org/how_to_connect_ipega_to_iphone_7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369334/normal_6031f1023186d.pdfIn PDF document text
    • https://tojemiwavujiguv.weebly.com/uploads/1/3/4/4/134468879/81e70484a73b8a3.pdfIn PDF document text
    • http://rubewox.sportsontheweb.net/23393973359.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426075/normal_600cc95b7aad7.pdfIn PDF document text
    • https://vejikawotepux.weebly.com/uploads/1/3/4/8/134887167/bumenibukiditit-didoni.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489032/normal_60153b299f32e.pdfIn PDF document text
    • http://terugate.mypressonline.com/you_tube_tell_me_about_yourself_interview.pdfIn PDF document text
    • https://lixubirenolona.weebly.com/uploads/1/3/4/6/134669397/guzukeduxa.pdfIn PDF document text
    • http://gisoboxizaza.mygamesonline.org/how_to_wrap_a_gift_for_beginners.pdfIn PDF document text
    • https://pixiguva.weebly.com/uploads/1/3/2/6/132681827/235f3.pdfIn PDF document text
    • http://yeswins.space/dokedekejokupawoxe7z9.pdfIn PDF document text
    • https://xevaxeleputoli.weebly.com/uploads/1/3/0/7/130775823/5697e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403262/normal_6018b7205f6f8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://ninalosuza.rf.gd/28426564317.pdfIn PDF document text
    • http://tagejenetel.rf.gd/5497529184.pdfIn PDF document text
    • http://tugojolowok.epizy.com/88964124639.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fa1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA1E 5008 bytes
SHA-256: faaac1e1e92a2d36e64c67aec81965da9124ef6cd7ab96dafa69b43a53ab3746
font_01_sfnt_off00010b22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B22 11520 bytes
SHA-256: 30072addf59281be92cb423323da6be4c8106f4e58c6e9fbc0df232617822ae0
font_02_sfnt_off000131bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131BF 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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