Malicious PDF — malware analysis report

Static analysis result for SHA-256 06fdfa910ee34e64…

MALICIOUS

PDF

88.0 KB Created: 2021-04-03 18:47:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 4e553bd0e5efeda4320e8b7357b09ef1 SHA-1: 6efcb3ab42ff1681b15babb83d28695f5aa8a7c9 SHA-256: 06fdfa910ee34e64d19edde77b63411f05759ae15f78a95ced1daf369a1973d5
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many hosted on disposable domains, suggesting a link farm or SEO manipulation tactic. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs point towards an attempt to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

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://seumenha.ru/award?keyword=dyslexia+journal+pdf PDF link annotation
    • http://fibutogu.mywebcommunity.org/77314904390.pdfIn PDF document text
    • https://botakukejase.weebly.com/uploads/1/3/4/6/134610266/lelimajeb.pdfIn PDF document text
    • http://kitafoged.medianewsonline.com/62629714343.pdfIn PDF document text
    • http://damewonuseba.sportsontheweb.net/33215626302.pdfIn PDF document text
    • http://votixibutiro.medianewsonline.com/helter_skelter_film_1976_streaming.pdfIn PDF document text
    • https://vukibipodut.weebly.com/uploads/1/3/4/6/134690361/9570737.pdfIn PDF document text
    • https://jusisobopat.weebly.com/uploads/1/3/4/3/134326654/rolito.pdfIn PDF document text
    • http://xoxosedefoxadu.mygamesonline.org/use_of_the_fifo_cost_flow_assumption_means_that.pdfIn PDF document text
    • http://taxurofetizi.22web.org/angina_de_pecho_scielo.pdfIn PDF document text
    • https://faxovidovatage.weebly.com/uploads/1/3/4/3/134378957/xonibamikibuf_mufapopodeno_gumevakadad.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://uploads.strikinglycdn.com/files/29d9e10c-8c7f-4801-ba59-b7b1ed99d068/bajoruliwobifasil.pdfIn PDF document text
    • https://s3.amazonaws.com/tesotiwapax/lurivotokoxokimit.pdfIn PDF document text
    • http://tabejarobovo.rf.gd/how_to_program_roku_3_remote.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f58883d0-5de2-441b-a7b4-8be0206d8791/practice_3-3_proving_lines_parallel_worksheet_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b152c8b6-2de6-4071-af6c-6d50f48c4809/48592103674.pdfIn PDF document text
    • http://ruvazopogidane.epizy.com/saxejupewodigavoroweloni.pdfIn PDF document text
    • https://s3.amazonaws.com/bogeguva/ordinal_numbers_worksheets_with_pictures.pdfIn PDF document text
    • https://s3.amazonaws.com/fogibi/beginning_python_games_development_second_edition.pdfIn PDF document text
    • https://s3.amazonaws.com/fejakixoweka/12_steps_of_aa_explained.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/45882caf-1522-46bf-a2ea-7495430220b7/kasefigixejig.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c1247dbb-e011-4eaa-b444-a72c511430cc/83632958162.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f6e58070-84ab-409f-be6a-2655cd51e28e/73429460884.pdfIn PDF document text
    • https://s3.amazonaws.com/widofafane/wondershareelement_ocr_plugin_portable.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/466619c8-844f-4081-a328-3a9caa025b3f/96598139482.pdfIn PDF document text
    • http://pilomewolax.epizy.com/46458016951.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fbc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBC7 5084 bytes
SHA-256: 92e30a4f50c9595db39a48117f718619358e984b3270d7647598bf152415badc
font_01_sfnt_off00010d27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D27 10224 bytes
SHA-256: b9e36f4f3fa88ef9021c067b6d38e6d8b590c3b1b5d4cfc9a32a470a55a51714
font_02_sfnt_off00013048.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13048 16088 bytes
SHA-256: ba49a359edda73fb432b2118eee43e8681603f6c6f845ef214af08c3a95321db
font_03_sfnt_off00014508.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14508 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333