Malicious PDF — malware analysis report

Static analysis result for SHA-256 bfe463c1b6fb4378…

MALICIOUS

PDF

71.2 KB Created: 2021-04-03 10:09:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 5b9fecb5e213fba33ceb3eeaaa57a6ed SHA-1: 74167becf2cef4fa937024e3597cdc1e843dc9e7 SHA-256: bfe463c1b6fb4378310e6b0061a62bc64f39f16572a0e46dbc887bdf4dd88f7b
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://midufefew.ru/123?utm_term=abortions+performed+per+day+in+the+us PDF link annotation
    • https://cdn.sqhk.co/numovasovev/id9Rrgd/tekamurebaselakujazulol.pdfIn PDF document text
    • http://pusatokolerax.mywebcommunity.org/tituzozogowubiror.pdfIn PDF document text
    • http://3bureaureport.info/lesco_ride_on_spreader_sprayertzwpz.pdfIn PDF document text
    • http://venameripuna.22web.org/adwords_fundamentals_exam_questions_and_answers_2020.pdfIn PDF document text
    • http://all-system7.xyz/woputixanerofadesojas8qsb.pdfIn PDF document text
    • http://lajodibibodi.getenjoyment.net/valanokinemijiperofa.pdfIn PDF document text
    • http://avit0.cc/431640747717fn7s.pdfIn PDF document text
    • https://cdn.sqhk.co/petebeki/nghjfhi/run_fit_run_shirt_crowder.pdfIn PDF document text
    • http://hisgohar.site/66214869138yg35a.pdfIn PDF document text
    • https://cdn.sqhk.co/nuxowilag/dfjg7X5/talionic_law_definition.pdfIn PDF document text
    • https://cdn.sqhk.co/letarezetap/CDWhbqq/bamogapewinifusofenarilog.pdfIn PDF document text
    • http://indonesia2health.online/14275844740lpwy3.pdfIn PDF document text
    • http://cosmicgig.com/52513958565cgfld.pdfIn PDF document text
    • https://cdn.sqhk.co/dijowasedop/ghifqVw/43220696681.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://luvibiw.epizy.com/78540801726.pdfIn PDF document text
    • http://lalowaxe.epizy.com/95469467711.pdfIn PDF document text
    • https://5090c2af-253d-40c3-bfb7-942fc6db26b0.filesusr.com/ugd/0511f5_3334e00e04d5467f9f9b1a3be6c21853.pdf?index=trueIn PDF document text
    • https://6afed14e-2b01-442b-8c2e-11a8a6f39965.filesusr.com/ugd/46a5ae_d6015f7d745542a191215c660e0e1054.pdf?index=trueIn PDF document text
    • https://786c536d-253b-4a15-94df-129c4693a223.filesusr.com/ugd/1fc311_54bc8072f3aa48fdb9037c14d8be6119.pdf?index=trueIn PDF document text
    • http://dipibezepipes.rf.gd/88434821194.pdfIn PDF document text
    • https://1dfef493-bba3-4db0-89f7-7cef958ceea2.filesusr.com/ugd/3dbeb3_59f9e1b4fe17434bb7af665f02dc177e.pdf?index=trueIn PDF document text
    • http://lovamavip.epizy.com/dakej.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_off0000d615.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD615 5480 bytes
SHA-256: 205ecd1907b5abb925c3df746d55064e18ccc10f2e4a05b6d480f818861068bc
font_01_sfnt_off0000e88c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE88C 10720 bytes
SHA-256: 538fbc90a6c65431715543cb0d046f2c319588061b1f50ad1a0e2d655cef7084

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