Malicious PDF — malware analysis report

Static analysis result for SHA-256 094ffbfedeeaafd5…

MALICIOUS

PDF

78.2 KB Created: 2021-02-21 15:13:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 0ff5e32b639fe02bd82258e8010cdd02 SHA-1: 978a8e44b6a1f5a934c5e7131f88015ffb3c0818 SHA-256: 094ffbfedeeaafd5be92f5d392ea8649ed1146ac113bded392587df868330add
126 Risk Score

Malware Insights

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

The sample was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains numerous external URIs, with one pointing to 'baarspo.ru', suggesting a phishing or link-farming attack. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly indicates the PDF's purpose is to host a large number of links on disposable hosting, likely for SEO manipulation or to distribute further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://baarspo.ru/123?utm_term=ability+to+follow+instructions+example PDF link annotation
    • http://leadtop.co/20058024420q9qkb.pdfIn PDF document text
    • https://raxopukefafifi.weebly.com/uploads/1/3/2/6/132695755/zarubuvobivijax.pdfIn PDF document text
    • http://tizigigukaj.22web.org/vilniaus_autobusu_stotis_informacija_telefonas.pdfIn PDF document text
    • http://triple-doska5.club/84674723641x7q6a.pdfIn PDF document text
    • http://vorecan.space/zutupileri6kq4u.pdfIn PDF document text
    • https://gogesatita.weebly.com/uploads/1/3/4/3/134321397/7c0bbd0cba27df.pdfIn PDF document text
    • https://cdn.sqhk.co/baxalelizop/jhgcic4/binawagebisex.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380523/normal_5fe34390580e4.pdfIn PDF document text
    • http://ketrovk.xyz/chadariya_jheeni_re_jheeni_song_320kbpsvfgrx.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385204/normal_5ff7e7762bc83.pdfIn PDF document text
    • https://tenimuleletef.weebly.com/uploads/1/3/4/3/134343202/bde77.pdfIn PDF document text
    • http://pumba.fun/excel_list_of_sheets_in_workbook37yev.pdfIn PDF document text
    • https://cdn.sqhk.co/woleparos/dhgiiji/armor_fight_steel_blade_mod.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487625/normal_601c5cb3a7cbe.pdfIn PDF document text
    • https://zuzuvisaze.weebly.com/uploads/1/3/0/7/130738998/6988528.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/bisegilupuf/71784812691.pdfIn PDF document text
    • http://kopuperoki.epizy.com/family_members_in_english_worksheets.pdfIn PDF document text
    • http://wapinogure.epizy.com/zaboxakunobuzoxudulal.pdfIn PDF document text
    • https://s3.amazonaws.com/xebuvuwov/linear_approximation_and_differentials_worksheet.pdfIn PDF document text
    • http://zefixufedinokas.epizy.com/29381924704.pdfIn PDF document text
    • https://s3.amazonaws.com/werowibovezoje/jurosiwugosexejer.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_off0000f2a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2A4 5552 bytes
SHA-256: 17f2e90ff54d8f7e88623de611917bbd4b5632e95f3920d183195b762e95d34f
font_01_sfnt_off00010594.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10594 10544 bytes
SHA-256: 59a170fe7defd4c3d9412c421df66e90444527737d19a33cd4c1a932b9a6f031

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