Malicious PDF — malware analysis report

Static analysis result for SHA-256 22e1048497e8ec59…

MALICIOUS

PDF

81.4 KB Created: 2021-05-10 06:51:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: be5090d33ab0bf05d00177f6d5a96dc2 SHA-1: 2ba5d63e30b7b7d6bf5a58b0549ecae15dd95b4f SHA-256: 22e1048497e8ec599d88e8fd55b03e06b6dc713f4e2792b0e3a938e0cf1632e6
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are hosted on disposable domains or are part of a link farm, indicating a phishing or spamming campaign. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to direct users to phishing sites or potentially download further malware. No scripts were extracted, but the PDF structure itself is indicative of a malicious lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://pelibifir.ru/strik?utm_term=teknetics+delta+4000+vs+fisher+f22 PDF link annotation
    • https://cdn.sqhk.co/dokukavifig/hSjfFnr/blacksmith_stoves_instructions.pdfIn PDF document text
    • https://cdn.sqhk.co/tozegatopaxu/w2dmgh2/kuretuboparol.pdfIn PDF document text
    • https://poxusesemeli.weebly.com/uploads/1/3/4/4/134462398/fuzajo.pdfIn PDF document text
    • http://zutumufedige.getenjoyment.net/vuxovosepurumi.pdfIn PDF document text
    • https://bafiredevidif.weebly.com/uploads/1/3/1/3/131384403/7865959.pdfIn PDF document text
    • http://feremujidonigu.getenjoyment.net/tumores_benignos_de_pulmon.pdfIn PDF document text
    • https://cdn.sqhk.co/tarekekog/g2hh3hg/ordained_meaning_in_greek.pdfIn PDF document text
    • https://vepezoroz.weebly.com/uploads/1/3/4/6/134605761/xafemel.pdfIn PDF document text
    • https://cdn.sqhk.co/vakanaju/3chhbhi/16713570613.pdfIn PDF document text
    • https://nugilura.weebly.com/uploads/1/3/5/3/135317706/wituwote.pdfIn PDF document text
    • http://lezobul.medianewsonline.com/sepsis_pathogenesis.pdfIn PDF document text
    • https://kigadipokifexi.weebly.com/uploads/1/3/0/8/130813079/8490623.pdfIn PDF document text
    • https://cdn.sqhk.co/zudilubal/VhfgcWG/tezosuwezapevex.pdfIn PDF document text
    • http://lewijufe.sportsontheweb.net/vsepr_theory_questions_and_answers.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://c208ddc4-37ec-4cef-823d-79aeaa8cd68a.filesusr.com/ugd/d34c4d_b3c82b7b04a546749cfa91e425c04152.pdf?index=trueIn PDF document text
    • https://af1bea64-f5cd-41c2-a7c1-97f21c1aa057.filesusr.com/ugd/592671_c91b983704d14dd28bc6e2c20f7db31e.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/f4c1ce3c-e4a3-4706-98fc-b85d9d63062e/20344900147.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/653bb948-ce95-442b-ac38-481f0ca39738/jikanuleted.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/60445d20-80db-464d-bf0c-4ceff189c015/60434715569.pdfIn PDF document text
    • https://b595a6f9-6bcb-48d8-acfc-7cb8c696cf55.filesusr.com/ugd/21f311_c28c66f9a1b24723aacde6076a87eb21.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/waxegatulo/72651622213.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/abbfba46-6096-4e02-affd-1be3ef45a060/what_was_the_texas_constitution_of_1836.pdfIn PDF document text
    • https://s3.amazonaws.com/zerejibixupav/21456089146.pdfIn PDF document text
    • https://s3.amazonaws.com/zemunomipazikez/45632978209.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/929e47b1-194e-4819-b095-717958d6458e/8869657617.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_off0000f27b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF27B 5544 bytes
SHA-256: 23dabcb13ad900b10671b04805fcd06f025284383f3616978e469ea8831dbe1d
font_01_sfnt_off0001055b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1055B 2044 bytes
SHA-256: 4fb9759495a685ca401297c7630bcd1af71d4783277a8fe40ec2a56e93e17845
font_02_sfnt_off00010e31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E31 12152 bytes
SHA-256: 9adfa518525181c85f7cfb95531726ff35a29d3850348c91661a2079c9535ac2