Malicious PDF — malware analysis report

Static analysis result for SHA-256 b5de9a5c90350964…

MALICIOUS

PDF

80.7 KB Created: 2021-03-29 22:59:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: a534c9e7c7fbf561a75306c48f5e5bfa SHA-1: 275087c64715a09458a365e83190d6c1097d5eea SHA-256: b5de9a5c90350964fc799136987e4b61bb35127aca48c9aeda5e6361f61791d6
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URI pointing to a suspicious domain, masquerading as a 'career development plan'. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. While no scripts were directly extracted, the PDF structure and embedded URL suggest it's designed to redirect users to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://seumenha.ru/award?keyword=career+development+plan+pdf PDF link annotation
    • http://healthit.space/74172342960awzku.pdfIn PDF document text
    • http://all-system7.work/28372068165u1q1p.pdfIn PDF document text
    • https://cdn.sqhk.co/sifajoxojif/ii8oijg/lowivan.pdfIn PDF document text
    • https://cdn.sqhk.co/litawoxelida/haBhb9K/poxasi.pdfIn PDF document text
    • http://autobuff.xyz/388078599252lh5n.pdfIn PDF document text
    • http://retys.space/samsung_rfg297hdrs_service_manualwrw4j.pdfIn PDF document text
    • http://blue-tick-central.com/water_resources_engineering_related_jobs_in_indiau8frh.pdfIn PDF document text
    • https://cdn.sqhk.co/wadalibituge/YAhgWge/memobagoto.pdfIn PDF document text
    • https://cdn.sqhk.co/bitenutugiw/DenCibb/bad_religion_world_war_iii_lyrics.pdfIn PDF document text
    • http://sunny-web.ru/81528840023zq9nd.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/petuzutemixuvod/rirevosesasububenubil.pdfIn PDF document text
    • http://wurebosuloxu.myartsonline.com/jodibaragesot.pdfIn PDF document text
    • http://kulebosux.myartsonline.com/napiwofomiwadomamozize.pdfIn PDF document text
    • http://mozilerinalut.epizy.com/vupukaxiganefeni.pdfIn PDF document text
    • https://s3.amazonaws.com/pekatikisuruki/por_que_se_bautizan_los_nios_pequeos.pdfIn PDF document text
    • https://s3.amazonaws.com/sikuva/how_to_make_a_successful_life_coaching_business.pdfIn PDF document text
    • https://s3.amazonaws.com/pazerogasarinu/birulofasovebejiwig.pdfIn PDF document text
    • http://lexaxixamu.rf.gd/vamifolapinolagopefiga.pdfIn PDF document text
    • http://gulopajekojof.epizy.com/colonoscopy_cancer_screening_guidelines.pdfIn PDF document text
    • http://pagikojezokatu.rf.gd/81813881077.pdfIn PDF document text
    • http://widifusi.myartsonline.com/a_dictionary_of_chinese_symbols.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f37f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF37F 4832 bytes
SHA-256: aa6892ec570acb1af4c0b37a087d13ab0f23a940614ceb482c7fa65fb4ee1cb4
font_01_sfnt_off000103df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103DF 10424 bytes
SHA-256: 6dc385ffe2913ab6d855d2591f4f7bb90227bd67f1e31829b7b552dcc843276d
font_02_sfnt_off00012739.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12739 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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