Malicious PDF — malware analysis report

Static analysis result for SHA-256 b323cc2b2af6ed75…

MALICIOUS

PDF

123.2 KB Created: 2021-04-10 16:54:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: b33d881bf102d842bff859de2a951d25 SHA-1: ef1a0b3fd1c2be471c1a4249cc6e5420f2ba9da5 SHA-256: b323cc2b2af6ed75483465518b49dcd30fe8cb5fce627b8c5f02a13831fdde40
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://botokaw.ru/strik?utm_term=what+is+not+a+characteristic+of+italian+renaissance+art PDF link annotation
    • http://fukiwurezopukof.mywebcommunity.org/sapajajubikudeseba.pdfIn PDF document text
    • http://wosozage.mypressonline.com/anche_in_italiano.pdfIn PDF document text
    • http://sutiboju.sportsontheweb.net/76056330288.pdfIn PDF document text
    • http://gukivuzijisuva.getenjoyment.net/gidusaregikegirogetoseb.pdfIn PDF document text
    • http://jixewelo.scienceontheweb.net/bissell_powerforce_bagless_vacuum_parts.pdfIn PDF document text
    • http://dariduv.22web.org/27730498737.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446270/normal_5fd62826d0f8c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418370/normal_60302def3a665.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
    • http://puteroxono.epizy.com/jotaboma.pdfIn PDF document text
    • http://widepidaba.atwebpages.com/69854820162.pdfIn PDF document text
    • http://xafezup.rf.gd/how_to_use_old_kenmore_sewing_machine.pdfIn PDF document text
    • http://bavival.rf.gd/what_are_the_three_parts_of_a_narrative_text.pdfIn PDF document text
    • http://ludumidajite.rf.gd/huebsch_washer_and_dryer_for_sale.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c25715cb-5e13-4c2c-8e23-9dfb39992d96/how_much_does_a_sandwich_bag_weigh.pdfIn PDF document text
    • http://zonafikepejese.onlinewebshop.net/43164547264.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c5ec6fa-13ac-4ec5-a390-0a3741c5190c/marvel_spider_man_miles_morales_ps5_wallpaper.pdfIn PDF document text
    • http://gelunavobulago.epizy.com/5963975902.pdfIn PDF document text
    • http://bopulamumu.rf.gd/vofabunufanuvaduwen.pdfIn PDF document text
    • http://jopanitovoxa.epizy.com/gmp_ich_guidelines_for_accelerated_stability_testing.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00019aeb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19AEB 4768 bytes
SHA-256: fd908437647b9a9c111388344c7d9e342cb0f79d3f152a473fa2e3bdeb4dfaf9
font_01_sfnt_off0001ab12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1AB12 10992 bytes
SHA-256: 48a90968ea1e44192f0768d9fc89175070d74feb8e8cd4ed184414352d273616
font_02_sfnt_off0001cfee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1CFEE 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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