Malicious PDF — malware analysis report

Static analysis result for SHA-256 0aab4aa71aad5fbd…

MALICIOUS

PDF

80.6 KB Created: 2021-03-15 00:29:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7670bd94662d39c70b7b3f5d6544a541 SHA-1: ee1621421f7c6cd12bdd3c3e277aaa6e35139e6b SHA-256: 0aab4aa71aad5fbddb6d07188efb05200cbab486ae60bbed0103410b1dbb7c88
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URI pointing to a suspicious domain, vilenefex.ru. This domain is likely used to host phishing content or malware. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of embedded URLs suggests an attempt to redirect the user to a malicious site, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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=ecology+vocabulary+review+worksheet
    • http://siditomema.22web.org/55829383159.pdf
    • http://russianpatentexpert.com/88075590605vclpa.pdf
    • http://wide-mean.top/91486385531qh6qd.pdf
    • http://hairhome.moscow/what_are_3_characteristics_of_communism2qtvb.pdf
    • http://gepexoliv.medianewsonline.com/63625159302.pdf
    • http://digitalcalakk1.xyz/38310838765fm14q.pdf
    • http://checkmycredit.info/804198062649reyt.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/wutogugej/how_to_fix_ps4_auto_eject.pdf
    • https://uploads.strikinglycdn.com/files/e1b053e4-9675-4632-9fa5-7fd95e6dd9ac/how_to_say_mami_in_spanish.pdf
    • http://zaxuzut.atwebpages.com/les_animaux_fantastiques_les_crimes_de_grindelwald_livre.pdf
    • https://s3.amazonaws.com/dutimajizowa/meeting_agenda_template_for_project_management.pdf
    • https://s3.amazonaws.com/wulagisi/what_ink_does_the_hp_envy_5010_use.pdf
    • https://s3.amazonaws.com/padadutiseni/musekerija.pdf
    • https://s3.amazonaws.com/kujesulad/protein_shake_nutritional_information.pdf
    • https://uploads.strikinglycdn.com/files/c6284d1d-b7de-4771-873f-5142485812b1/17142371940.pdf
    • http://nivigiwaragere.epizy.com/annual_report_holcim_indonesia_2013.pdf
    • https://s3.amazonaws.com/widofafane/invoice_template_auto_repair.pdf
    • http://mutidulofof.epizy.com/gartner_antivirus_report_2018.pdf
    • https://s3.amazonaws.com/lerezazo/the_giver_chapter_14-18_summary.pdf
    • https://s3.amazonaws.com/kezemiradigu/sql_experienced_interview_questions.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ef78.bin
44a6e14672afdc0f5adae8a48b66e9e0b329dd0833caf25abd4c55e351577d51
pdf-font-stream PDF embedded font (sfnt) at offset 0xEF78 5476 bytes
font_01_sfnt_off0001022f.bin
1bb52a1121569bf4e1708f023694e8eb689e378a1bed0ad46dd3589c050a91f6
pdf-font-stream PDF embedded font (sfnt) at offset 0x1022F 2084 bytes
font_02_sfnt_off00010b3e.bin
c9db71662bdc0956ebbe05f2a5683087bbbf541c9974fb3db3de532e5bab752c
pdf-font-stream PDF embedded font (sfnt) at offset 0x10B3E 11976 bytes