Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc000c630657f6f2…

MALICIOUS

PDF

76.5 KB Created: 2021-04-18 16:19:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 9eabf59ce8401a98fe70d28f86d67a3f SHA-1: ef157c7c6c874d75a892f385eed0262f95a99272 SHA-256: bc000c630657f6f2fd59d83b6a86a055292ce699e695c73eb2a8a4ea82f9730b
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document was flagged by a machine learning classifier and ClamAV as malicious, indicating it likely exploits a vulnerability for client execution. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing lure. The primary URL observed is https://jacksth.ru/strik?utm_term=how+to+use+conair+extreme+steam+fabric+steamer.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://jacksth.ru/strik?utm_term=how+to+use+conair+extreme+steam+fabric+steamer PDF link annotation
    • https://cdn.sqhk.co/fopeziriga/gjhgchc/hero_xtreme_bike_price_in_bd.pdfIn PDF document text
    • https://cdn.sqhk.co/modurasisuwu/gjWibjg/real_football_2020_offline_apk.pdfIn PDF document text
    • http://reduslim-europa.site/33372724844z7d59.pdfIn PDF document text
    • http://about-central.com/75313527200lulb7.pdfIn PDF document text
    • http://sesizuxewewax.mygamesonline.org/general_data_protection_regulation_gdpr_2018.pdfIn PDF document text
    • http://marifivelaj.mygamesonline.org/wefujoxefumuvajiwidav.pdfIn PDF document text
    • https://cdn.sqhk.co/lisesemafo/f0heijl/tisaso.pdfIn PDF document text
    • http://itravelgr.com/statistics_for_dummies_website40l2b.pdfIn PDF document text
    • http://bezprovodov.guru/234963816412ue9e.pdfIn PDF document text
    • http://sq11mini.com/xaginonm52o4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sajulugebimisu.myartsonline.com/62939279097.pdfIn PDF document text
    • https://63dbeab4-18c6-4677-a808-17cd77aec119.filesusr.com/ugd/963d80_21a027300fa74f5a904848d3331812e1.pdf?index=trueIn PDF document text
    • http://duxegejuw.atwebpages.com/25488943479.pdfIn PDF document text
    • https://332892e0-6a2b-40ad-946e-e7c92c61c867.filesusr.com/ugd/3e5d97_3a944f6df66e4ce1ab0bdcea0ab7ca10.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dedinavesute/dabawuruw.pdfIn PDF document text
    • https://97783159-ced7-426e-9fbd-60d2bb3342fb.filesusr.com/ugd/00058f_cbf7b9386869456bbfc4d397f82b063f.pdf?index=trueIn PDF document text
    • https://070488ba-e3d9-4c74-834b-445551f5513c.filesusr.com/ugd/fb83f1_d4e5a0b85bd8476eab5f5ecff990553a.pdf?index=trueIn PDF document text
    • https://393102e6-89af-4738-8cad-89662dba8dc5.filesusr.com/ugd/33a16d_ea159cbc4e0e44969d83c1bb36fd1e9c.pdf?index=trueIn PDF document text
    • https://7fad2989-91b8-457c-89bc-9a0e7aeef19f.filesusr.com/ugd/b03ff3_895a7699bfa94f92bd2253d1f6c8cdd8.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tokafanawa/28125908190.pdfIn PDF document text
    • https://8fa10226-37c2-454d-bd65-ced70ecbf0c4.filesusr.com/ugd/c34aa9_697b051b322f47d39656b23358e5ebfe.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/varolexexus/metal_gear_solid_enemy_alert_sound.pdfIn PDF document text
    • https://b3079848-b07e-4d89-9244-05dfa5dd91fe.filesusr.com/ugd/3ab5ed_ad2969b53d684ec1b414ceb7c9685e19.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/votuweroxigezog/bujuwebajizo.pdfIn PDF document text
    • https://ab60d57a-1f92-408f-9079-0b325776b613.filesusr.com/ugd/724fb5_eeba0f03b64b49b387358a88d726839f.pdf?index=trueIn PDF document text
    • https://893c8be9-d140-4a04-8a3e-66bd54b472cd.filesusr.com/ugd/efd7ea_438541e962d24e139d6987084cbad32d.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_off0000ee22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE22 5256 bytes
SHA-256: 2b288171d9b7c30f80ad2678fd40e83cfdcf541935576618f192335134e9aaf5
font_01_sfnt_off00010006.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10006 10476 bytes
SHA-256: ff8b8c8f85447be21d2bccee01379265a6be84f34518595b2402ed83adba338c