Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7100d416f4a7993…

MALICIOUS

PDF

88.2 KB Created: 2021-04-15 09:40:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 775dda70d768742eed68a0218d632eac SHA-1: bddc80e3b52d4bebcb5b4fdd1282236c8bf698d0 SHA-256: b7100d416f4a7993158d36ec6f4f7718e46d540fc5785fa299034a1c04f945b9
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file is a PDF document that contains an embedded URL pointing to a malicious domain. The document body, though heavily obfuscated, suggests a lure related to 'strategic human resources planning'. The presence of the PDF_URI heuristic and the ClamAV detection strongly indicate malicious intent, likely to redirect the user to a phishing or malware distribution site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://kuzutuzo.ru/strik?utm_term=planeaci%25C3%25B3n+estrat%25C3%25A9gica+de+recursos+humanos+pdf PDF link annotation
    • http://lamejix.scienceontheweb.net/20112171995.pdfIn PDF document text
    • http://sirunome.mypressonline.com/atrahasis_tablets.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376600/normal_6008fde48331a.pdfIn PDF document text
    • http://jovasetiveduza.scienceontheweb.net/repogesoxikotabeburufuje.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455194/normal_6013158cedd02.pdfIn PDF document text
    • https://cdn.sqhk.co/wuzirixowev/jgdhggh/25427431948.pdfIn PDF document text
    • https://cdn.sqhk.co/ranemagesoga/jLhg0hh/microsoft_teams_app_for_chromebook.pdfIn PDF document text
    • http://veviwumifuvemuz.mypressonline.com/42458562943.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416153/normal_605b723bac261.pdfIn PDF document text
    • https://cdn.sqhk.co/nadetajagupe/krFNahc/seriza.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/midaguvimabof/formation_en_alternance_definition_en_anglais.pdfIn PDF document text
    • https://s3.amazonaws.com/fosagoba/past_perfect_tenses_exercises_with_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/kelukakeb/what_does_a_low_moca_score_mean.pdfIn PDF document text
    • https://s3.amazonaws.com/potamotaz/aquaculture_journal.pdfIn PDF document text
    • https://s3.amazonaws.com/pogolo/65423930452.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eb08f6d7-279e-4ccd-8653-d270d96c3916/how_do_you_start_an_argumentative_essay.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ddad3463-b5a4-4ae9-b92b-9b5d4d2b73f8/7596782799.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/813af5bb-7990-42b2-9dc2-00a79ed6f947/66276815689.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5a881408-c533-4030-b313-8f1fe6b35926/bejesetudemo.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_off000116f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116F6 5848 bytes
SHA-256: 34453d6c9d987f216eefd18d92f1b0abfa27bddc29f5bb95e9706223f650b59f
font_01_sfnt_off00012a20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A20 11920 bytes
SHA-256: 72549a6eb0751ff9c3488ec0d1803fd5939d60370e404406eb0f1d6cfc5b9297

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