Malicious PDF — malware analysis report

Static analysis result for SHA-256 a04d7f84ce9fdcf8…

MALICIOUS

PDF

95.1 KB Created: 2021-05-01 01:13:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 523c5a2e11d2471f5a666605be38c9d5 SHA-1: e1fe6f1f04f2164cd158773ad22fdca08642e2ba SHA-256: a04d7f84ce9fdcf83d851071c9c2133b1a58c5c5501c2933a80dba3716908dba
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a common tactic for link farms and phishing. One prominent URL, 'https://dugedepap.ru/strik?utm_term=doro+7060+price', suggests a phishing attempt related to product pricing. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://dugedepap.ru/strik?utm_term=doro+7060+price PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4458838/normal_6002389900fcc.pdfIn PDF document text
    • https://sudikefasegez.weebly.com/uploads/1/3/1/0/131070357/3a3f62188.pdfIn PDF document text
    • https://worojipe.weebly.com/uploads/1/3/1/3/131382243/defajoj_lipalu_wurapumu_kozakuxonibosep.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459477/normal_60115f987fbc1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4477409/normal_5fefb684d59af.pdfIn PDF document text
    • https://berafakeje.weebly.com/uploads/1/3/4/0/134000448/badokibo-xebabogen-guvuxivupunemad.pdfIn PDF document text
    • https://cdn.sqhk.co/tuseliwi/jhcjghg/saxexegizovelir.pdfIn PDF document text
    • https://kogezuzoxato.weebly.com/uploads/1/3/1/0/131070880/gopadirobige.pdfIn PDF document text
    • https://cdn.sqhk.co/rilowikapaz/Wjv7jhj/jewulu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/b5f24ef0-2fff-411a-ad17-fa3d5eea47cc/101_design_methods_vijay_kumar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/66d537dc-68a1-4815-9fdb-673f7aad2e4a/the_lord_of_the_rings__the_hobbit_collectors_edition_books_harpercollins_2013.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8b58f341-8259-48d4-be5f-f47aff17a4fe/wezuwesigidivopegoxizom.pdfIn PDF document text
    • https://9afb1793-bc57-4514-bb46-74e980466609.filesusr.com/ugd/11f207_cb06b4223a9944c49b4a456de4823d4d.pdf?index=trueIn PDF document text
    • https://6d706a39-1f93-4f1a-9423-caccf7e65e71.filesusr.com/ugd/69f91f_da36904a933141e3973e4fa00c72c280.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/4db6774b-329b-40d2-8864-fecadfd9d776/68690434701.pdfIn PDF document text
    • https://351e5f87-f9e5-4015-92cd-d601692b9ec3.filesusr.com/ugd/a0d0d3_290931d442754b6c93afb4f81f83c4de.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/de6a3d42-985d-44f5-9409-9c1664599922/replace_drum_brother_2270dw.pdfIn PDF document text
    • https://2065f6f1-29fb-48ac-a230-4f4ab2d4b746.filesusr.com/ugd/b62953_c5b73ff34ce14082afb9cefeecdcbd6d.pdf?index=trueIn PDF document text
    • https://6998e30b-c911-4113-ab34-4c15204891c7.filesusr.com/ugd/429b25_6531ec76a91e4faa8abded7bb36f46b4.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/1a11905e-da8c-4a14-8409-150df20407ba/lisilix.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6ee61db7-3b98-423f-a2cd-2d56da07a104/24654881469.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4ff7fa55-5bfa-4dfa-9b72-4565e0761098/cnbc_stock_market_live_updates_friday.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a5ac04ca-fbdb-4f8b-a8b1-ec20a01a2805/nopiligulawazuv.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_off0001392e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1392E 4884 bytes
SHA-256: dd2df8424b9955f3ec9772e311591d4450ca347d90f1ce39dcae30036f2e9a1b
font_01_sfnt_off000149ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x149EA 11528 bytes
SHA-256: a7039e68bfc59840d4523d5fc789bdb32550afa2bfc14dafc936e4e11daa5534