Malicious PDF — malware analysis report

Static analysis result for SHA-256 7040ab6e7c2be365…

MALICIOUS

PDF

94.8 KB Created: 2021-03-29 11:48:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: c51ae0f0d639d4e3eaf735d590ea0e2b SHA-1: b2989f07fee8399c5e699f093b1e83439825ac9b SHA-256: 7040ab6e7c2be36592f8d0d811dca8b60287c3165f5460ef8c518191157b6610
126 Risk Score

Malware Insights

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

The PDF file contains an embedded URI pointing to a suspicious domain, identified by heuristics as a link farm on disposable hosting. ClamAV detection as 'Pdf.Phishing.Trojan' further supports malicious intent. The document body, though heavily obfuscated, contains keywords related to a guide, suggesting a lure to a phishing or malware distribution site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • 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 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://vilenefex.ru/wix?keyword=ff14+sephirot+ex+guide+deutsch PDF link annotation
    • http://gisomog.iblogger.org/wokonufewifi.pdfIn PDF document text
    • http://somixewavado.sportsontheweb.net/48023077741.pdfIn PDF document text
    • http://simekavo.22web.org/52548056609.pdfIn PDF document text
    • http://gomirakapo.22web.org/catecismo_para_primera_comunion.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/xalasawu/malincho_case_study_answers.pdfIn PDF document text
    • http://xelelurez.rf.gd/10558396147.pdfIn PDF document text
    • http://diwifesatikebak.epizy.com/how_long_to_cook_sirloin_steak_in_george_foreman_grill.pdfIn PDF document text
    • http://likewiwojuxus.atwebpages.com/fumadasawi.pdfIn PDF document text
    • http://pevivudawof.epizy.com/happy_birthday_wishes_to_boyfriend_yahoo_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/jolozidabi/30916896589.pdfIn PDF document text
    • http://limixawur.rf.gd/bononedujos.pdfIn PDF document text
    • http://jojanotesejivi.epizy.com/tavumopapeviron.pdfIn PDF document text
    • https://064d663d-f6b2-44cf-a6ad-083da5f315e5.filesusr.com/ugd/77eba6_f7bdedfecf904d7fa1779ed0ced09c96.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/mesotodimus/cpr_guidelines_2018.pdfIn PDF document text
    • https://8dac4d01-2cd1-45d2-8b5f-6005f802adc9.filesusr.com/ugd/1f96ce_fad951c6638a4cacbed8fb756c007da1.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/rujabepifar/86807705897.pdfIn PDF document text
    • http://difedomuki.epizy.com/baburnama_in_tamil.pdfIn PDF document text
    • http://mejisabipof.rf.gd/85077515405.pdfIn PDF document text
    • http://jutoxuriwiloja.epizy.com/jinevugezigabigadoroler.pdfIn PDF document text
    • https://s3.amazonaws.com/boduxatavepe/39529617954.pdfIn PDF document text
    • http://midelex.epizy.com/costco_braided_apple_strudel_nutrition_information.pdfIn PDF document text
    • https://3e1af3dc-cf37-4f58-935d-0a6065bc5ce9.filesusr.com/ugd/3ca236_f8a16116739643c8b845170bf443945c.pdf?index=trueIn 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_off00010e8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E8B 5112 bytes
SHA-256: ed0f33a24b8bf578b68ff4d55fa1b391300c62c4f9b6617f879b9f20ee050724
font_01_sfnt_off00012021.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12021 11868 bytes
SHA-256: c38c74cb2175d254aefd2eec874d52c46d173ccbeb1162812c804cdd25fb46fa
font_02_sfnt_off000147bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x147BD 16368 bytes
SHA-256: 052783cbef28ba8697f6f398be88201faa204901353438eaa804551b09720799
font_03_sfnt_off00015d96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15D96 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f