Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b22f4f27df0534d…

MALICIOUS

PDF

70.8 KB Created: 2021-03-22 14:58:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 6689a025725b42c241e51ae724916563 SHA-1: d7816a2772bb441b841ec8dc5c93d70970eb77af SHA-256: 0b22f4f27df0534d1028aebdfa870b57b9a176457af57986c29a5ddae048a23a
186 Risk Score

Malware Insights

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

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 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://jumiwimov.ru/aws?utm_term=td+jakes+books+2020 PDF link annotation
    • https://cdn.sqhk.co/senosekagoko/jiPif3k/hungry_dragon_umbra_gameplay.pdfIn PDF document text
    • http://copyrights-notices-helps.com/50510167106secle.pdfIn PDF document text
    • http://alcexpress3.xyz/ingersoll_rand_p185_compressor_service_manualqd4jw.pdfIn PDF document text
    • http://newberginvestmentproperty.com/my_little_pony_in_the_sims_descargar_serie_espaolhhkol.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460463/normal_600a5416b2952.pdfIn PDF document text
    • https://cdn.sqhk.co/fepexeguma/iigh1gi/begupawazumawifotegatufi.pdfIn PDF document text
    • https://cdn.sqhk.co/fudamozomeb/njcr7T9/37202668962.pdfIn PDF document text
    • https://cdn.sqhk.co/jujejorule/cmhcicE/fexuvatubusovob.pdfIn PDF document text
    • https://cdn.sqhk.co/figakeves/jikijhb/armageddon_chess_rules.pdfIn PDF document text
    • https://cdn.sqhk.co/nizidevogaka/dihWhiQ/44404909514.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480886/normal_5fda312600ac5.pdfIn PDF document text
    • http://mantenancie.com/norton_anthology_of_english_literature_volume_2_contentsgmif9.pdfIn PDF document text
    • http://setlyb.online/resistor_color_code_chart_calculator2j9w0.pdfIn PDF document text
    • http://yildirimotobursa.com/health_and_safety_plan_for_construction8oc6d.pdfIn PDF document text
    • http://flowerport.market/18282778111rndho.pdfIn PDF document text
    • https://cdn.sqhk.co/vivakawibaki/idgcRgf/3d_pool_ball_hack_version_download.pdfIn PDF document text
    • http://copyrightshelpscenters.com/bacteria_and_viruses_worksheet_answersowwn6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://a7da3e60-63c8-46c1-a846-eab7df628ed2.filesusr.com/ugd/bba345_fa4ee9c4e81a450b9cc4d5570008e6b6.pdf?index=trueIn PDF document text
    • https://39c3e2ba-dcb8-4bc0-9ed7-0058f02c59d5.filesusr.com/ugd/fd4c29_94c72499a072416c9d364c8df01f455e.pdf?index=trueIn PDF document text
    • https://37bdae34-bb2f-403f-997c-54a7c09d9c06.filesusr.com/ugd/dc98cc_2b34cc9414884b8db398e1022d93d7bd.pdf?index=trueIn PDF document text
    • https://9eb5ee95-128e-4115-bcd6-d8db8525ce49.filesusr.com/ugd/9904c2_dd9aab180e854250bea752b3906c8475.pdf?index=trueIn 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_off0000d6ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6AE 5196 bytes
SHA-256: 3082695df664937c536d8e7dac8225512e4c0716f692ecc480cad1881898cef1
font_01_sfnt_off0000e871.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE871 11152 bytes
SHA-256: 5dd7094ac91eef1225a1dff799b416fe91f4d58d06bdf652407ff613b9d5ba57