Malicious PDF — malware analysis report

Static analysis result for SHA-256 25962140990e3f40…

MALICIOUS

PDF

87.0 KB Created: 2021-04-05 21:19:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 03563f9ddb8453b120383bb273a7f5ae SHA-1: 133d10ba1430ccde686514f444ebede742835687 SHA-256: 25962140990e3f4072f8b3a3cb58771102eaac7d76809c4a4988e5241343cb0b
126 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that redirects to a domain associated with phishing. Heuristics indicate it's a link farm designed to obscure the final malicious destination. ClamAV detection confirms its malicious nature, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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 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=wjec+a+level+biology+past+papers+2013 PDF link annotation
    • http://munivujikax.22web.org/kixuwalufigit.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465257/normal_605d753de6695.pdfIn PDF document text
    • http://vejofewi.iblogger.org/kitamazevopevuraked.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456116/normal_6027babf7278d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444115/normal_5ff8b6a1ab739.pdfIn PDF document text
    • http://lerasusakibura.22web.org/fire_emblem_heroes_merge_allies_guide.pdfIn PDF document text
    • http://kowesawu.iblogger.org/ergonomic_desk_setup.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379722/normal_6011d0219cbc5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/6f42c591-bea6-4902-b8cc-ab89611e98b7/64059825481.pdfIn PDF document text
    • http://badiwoxot.rf.gd/adobe_indesign_cc_2020_the_professional_portfolio_series.pdfIn PDF document text
    • https://s3.amazonaws.com/fazujo/rehras_sahib_full_path_audio_mp3.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2fc91414-8ce4-43a5-974a-f6cf5faadeb0/dometic_penguin_duo_therm_air_conditioner_shroud.pdfIn PDF document text
    • http://wuwepapose.epizy.com/ayo_and_teo_videos.pdfIn PDF document text
    • https://s3.amazonaws.com/dotivaf/nudazejoferizabuwizinaba.pdfIn PDF document text
    • http://besasasef.rf.gd/free_you_ve_been_booed_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8ce868e1-7c0d-40c6-a1c2-5ad737df6f90/line_6_floor_pod_review.pdfIn PDF document text
    • http://vafukibugaf.epizy.com/54450354732.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b25cccf-0440-4406-a984-e91a806f20a8/bijowemofavosoro.pdfIn PDF document text
    • http://vuzudaru.epizy.com/administrative_management_3rd_edition_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/637ce5b7-5dcd-43bc-9605-5abb93b4463b/how_might_you_collect_qualitative_data.pdfIn PDF document text
    • https://8d6920c1-aef5-45ed-b1a0-e693d63948fb.filesusr.com/ugd/0a593f_a0b8c39627ac4469a69eed991c1a8ec3.pdf?index=trueIn PDF document text
    • https://d12d056d-c16f-42d2-bb36-b12dbd13f8e5.filesusr.com/ugd/a2005d_1bc696ed2c4d421fae955ff01ffa9425.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_off0001112a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1112A 5980 bytes
SHA-256: 6e5fa918b296734d91e52438558f1602ce8009af52dad5d35793faabf90374f0
font_01_sfnt_off000125b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125B8 11484 bytes
SHA-256: 7fc4f99f2c98a2c0afc67c0262d6709a5f873c6d33fdd50db6630c6363b0cb84

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