Malicious PDF — malware analysis report

Static analysis result for SHA-256 5784daef8f061ddf…

MALICIOUS

PDF

100.1 KB Created: 2021-03-22 10:53:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 3232426d50d934e97e778a979cf4debb SHA-1: 46a559ac10b326170c711d1cc57ed751a98503cf SHA-256: 5784daef8f061ddf9bc71a70e46a8eb6b8c38303b7598fc11b8d5ec20ec91ffa
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

This PDF file was identified as malicious by ClamAV and an ML classifier. It contains a link farm with 30 external URLs, many hosted on disposable domains, suggesting a phishing or SEO manipulation scheme. The presence of embedded JavaScript, though obfuscated, indicates potential for further malicious actions such as downloading second-stage payloads.

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://zajinet.ru/strik?utm_term=weber+spirit+e+210+original+flavorizer+bars PDF link annotation
    • http://tedaxebipajir.iblogger.org/how_to_connect_ps3_controller_to_ps4_without_adapter.pdfIn PDF document text
    • http://wamuwosola.mygamesonline.org/9193648879.pdfIn PDF document text
    • https://noxolawozin.weebly.com/uploads/1/3/1/4/131452883/6066931848b.pdfIn PDF document text
    • https://luvofebujapima.weebly.com/uploads/1/3/0/9/130969865/1500e4be861519.pdfIn PDF document text
    • http://tofoxewesaxizuz.mywebcommunity.org/moto_g6_plus_pattern_unlock.pdfIn PDF document text
    • https://vizodifoberesin.weebly.com/uploads/1/3/4/9/134900429/mosesabuwezekufijid.pdfIn PDF document text
    • https://fasukawoj.weebly.com/uploads/1/3/1/4/131453618/679e24ba0552626.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://8b5ac0f3-2bc4-49a6-9a99-2541af31b215.filesusr.com/ugd/f2ef67_f745de388473429aa7addb923df01705.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/3ab7cb58-c630-47a4-935f-fe239e1d7d29/sifuwodufimajugabigapif.pdfIn PDF document text
    • https://c46c713f-5e69-4c64-aad4-d86f29440f76.filesusr.com/ugd/957c7b_dd15c80c5baf40689b0f91a1a7a04eaa.pdf?index=trueIn PDF document text
    • http://todugiremo.epizy.com/83600750611.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c3ac1da2-0ce3-4518-827f-66a65a8db623/xolurejizume.pdfIn PDF document text
    • http://naremijex.epizy.com/wopenadimiwigaropufin.pdfIn PDF document text
    • http://jowatazurusu.epizy.com/what_is_a_jeep_grand_cherokee_srt8.pdfIn PDF document text
    • https://2cc12256-1025-444a-bacb-901a9f007bda.filesusr.com/ugd/d1fcfc_ad369ea74e934ca59ca9418894e2fa0d.pdf?index=trueIn PDF document text
    • http://nodimetonakijeb.epizy.com/tavugodewajobevadef.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/57e6c7d9-7484-47e8-ac17-f8ab26bda0cf/viper_4115v_installation_manual.pdfIn PDF document text
    • https://cdb53ace-3f3f-41e1-823e-0ecf3add8ba2.filesusr.com/ugd/47e9e0_46b782eade5148ea91334b355c8ce0ff.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/bebbc61b-d154-4210-8a02-23b5f132f578/disanuduf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a62960f4-a4a8-4e81-9608-04c98305b815/29405011809.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_off00014a5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14A5B 5656 bytes
SHA-256: 2603e778b68d93bb14c47bb624318515850737bfa6ba141f964934fe7a95af7a
font_01_sfnt_off00015dd6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15DD6 10828 bytes
SHA-256: e270deced929ec1eda57e2b8fc5d3cf2e7ab5dd9bf247b2aa372f244e45da8c3