Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae466802b791fe8f…

MALICIOUS

PDF

72.4 KB Created: 2021-03-07 01:16:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 7f8973db5f6dde12c6a2bf03d02d270f SHA-1: 23b77fdb700310f51f25155792a8886159da3548 SHA-256: ae466802b791fe8fddc7091525262553c8ee50f483de036d0351dda20a8eeac8
186 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by a ML classifier and ClamAV, indicating a high likelihood of malicious intent. It contains a large number of external links, many pointing to disposable domains, suggesting a link farm or phishing campaign. The primary URL, https://mezovuduw.ru/strik, is likely used to redirect users to malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://mezovuduw.ru/strik?utm_term=britax+marathon+rear+facing+height+limit PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4369638/normal_602d0146b3ba1.pdfIn PDF document text
    • https://panikudar.weebly.com/uploads/1/3/1/4/131437701/lizakoba.pdfIn PDF document text
    • https://cdn.sqhk.co/mejofiwog/jejagiC/tugezebija.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4401982/normal_5ff9a92c17ff9.pdfIn PDF document text
    • https://gebedosoxabitox.weebly.com/uploads/1/3/5/3/135324181/3632575.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484994/normal_6035a59e2f83d.pdfIn PDF document text
    • https://cdn.sqhk.co/regomesu/dgfgijj/53106386519.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497109/normal_601853d3a9f54.pdfIn PDF document text
    • https://cdn.sqhk.co/fabozesemi/aXVQthc/can_i_apply_paint_protection_film_myself.pdfIn PDF document text
    • https://fenorepaxok.weebly.com/uploads/1/3/1/8/131856491/kogagufujariri-befamezotadoli-wawowepik.pdfIn PDF document text
    • https://dagevonedil.weebly.com/uploads/1/3/4/7/134736192/c8beae8f.pdfIn PDF document text
    • https://cdn.sqhk.co/fowurona/hfjgPhS/diy_wood_file_cabinet_plans.pdfIn PDF document text
    • https://cdn.sqhk.co/luzorisu/eE5Cxzz/62021764433.pdfIn PDF document text
    • http://foxilajat.sportsontheweb.net/dell_optiplex_780_sff_power_supply_upgrade.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370074/normal_600c1eaf210d5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4492580/normal_602ce38d3f569.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://salajire.onlinewebshop.net/zopudivuzewobusiv.pdfIn PDF document text
    • http://mijovutotukedes.onlinewebshop.net/commercial_cooler_repair_calgary.pdfIn PDF document text
    • http://minivenema.atwebpages.com/what_is_the_nespresso_signature_welcome_gift.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_off0000df4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF4A 5232 bytes
SHA-256: a53b0fb0c9d892a567754b6ea1f5f1f4c1ff624f5e3eb9e11f02e97fe78e219a
font_01_sfnt_off0000f0f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0F9 10328 bytes
SHA-256: f21e4ba42a13300e8ca699b03df548d6308d3496be9522817634c0911074eda0

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