Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed69833e129c7baf…

MALICIOUS

PDF

80.1 KB Created: 2021-02-23 01:17:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: dd160577db557157005725eeaee678f6 SHA-1: 7cfdab53c4351fc152a3104d5270d6dcb77881a1 SHA-256: ed69833e129c7baffc8ff4df1c117bfca36aeaf723620da4fdb3b57d497b5f09
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many pointing to disposable domains and employing UTM parameters, indicative of a link farm designed for SEO manipulation or malware distribution. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or trojan delivery. Although no scripts were explicitly extracted, the PDF structure and external links suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://jottigo.ru/strik?utm_term=what+are+some+examples+of+simile+in+poetry PDF link annotation
    • https://cdn.sqhk.co/degavorofala/w11hhgM/kakodosexinok.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480893/normal_60007a510b3a3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4503279/normal_60220f42e9956.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465018/normal_6027081ac98d1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455195/normal_602c48ad17aea.pdfIn PDF document text
    • http://opencabinets.xyz/55676961465koypy.pdfIn PDF document text
    • https://somigoduwus.weebly.com/uploads/1/3/4/4/134470899/kosuli.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475215/normal_5fe5cf7a704a8.pdfIn PDF document text
    • http://discout.online/gibuvesoderujirawabisuzd7dtt.pdfIn PDF document text
    • https://cdn.sqhk.co/xuzuvazol/gqbxATa/kobewitin.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464734/normal_601a62a9661f0.pdfIn PDF document text
    • https://jakemujilofadam.weebly.com/uploads/1/3/1/3/131380171/4265369.pdfIn PDF document text
    • https://cdn.sqhk.co/gudijupimeb/N4ghVge/44515158584.pdfIn PDF document text
    • http://sendgrid-de.com/75485732407rqm6e.pdfIn PDF document text
    • https://xuxewisi.weebly.com/uploads/1/3/4/2/134235501/tisufivosemi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4462073/normal_5fca72b6649a8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408009/normal_5fd8e837a0267.pdfIn PDF document text
    • http://djami.ru/xilisoft_video_converter_full_version_free_downloadz1z0z.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
    • https://s3.amazonaws.com/dedinavesute/dyson_cordless_attachments_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/luxaduzimase/sheet_street_head_office_contact_number.pdfIn PDF document text
    • https://s3.amazonaws.com/zagapaxa/how_to_know_which_drill_bit_is_for_metal.pdfIn PDF document text
    • https://s3.amazonaws.com/jalasilunaz/excel_freeze_panes_multiple_worksheets.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_off0000eec7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEC7 5112 bytes
SHA-256: 72e9765963f2f26ac17a40257acc1027a62407819f6e11d60a54ae5fdb04cfe6
font_01_sfnt_off00010017.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10017 10572 bytes
SHA-256: 128d9ddf91982a42774bca1621a76fc08846f3cbadb9e7e9c9d3341c7ac64bc1
font_02_sfnt_off0001244c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1244C 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230