Malicious PDF — malware analysis report

Static analysis result for SHA-256 1867b53c32ac8592…

MALICIOUS

PDF

76.9 KB Created: 2021-03-31 02:27:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 2e9c3ccff2cb6e1aad1afb1d5117b82b SHA-1: 11ae5b8a093a6276cd7e8c23d45e0ceb507c9868 SHA-256: 1867b53c32ac859242f68ce9c287b8efc49859c2a5b27c8abad36a427d62158a
126 Risk Score

Malware Insights

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

The PDF contains an embedded URL pointing to a suspicious domain, identified as a phishing or malware distribution lure. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URI suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://pelibifir.ru/award?keyword=separation+anxiety+disorder+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4422622/normal_605f36682add9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393026/normal_5ff1bc27676bf.pdfIn PDF document text
    • http://gutagige.sportsontheweb.net/regalame_una_foto_translate_to_english.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465691/normal_602b2b8e1adee.pdfIn PDF document text
    • http://difozoxezepi.getenjoyment.net/2530828023.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4504568/normal_605417e31fede.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449992/normal_605c9b42b8b7c.pdfIn PDF document text
    • http://xelipev.22web.org/armored_core_4_answer_regulations.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/fe9f0a53-ecf3-428d-84ba-ad90c3e8d784/how_to_get_ripped_with_trx.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fe03e33e-852f-4984-ab52-ec28dbedcc88/pumasopibagaxaf.pdfIn PDF document text
    • http://pumajuxav.rf.gd/asp.net_mvc_interview_questions_code_project.pdfIn PDF document text
    • https://s3.amazonaws.com/veledabejufi/chart_of_accounts_template_xero.pdfIn PDF document text
    • https://03dfb0eb-7fe6-4188-ad87-ea2b88df7b19.filesusr.com/ugd/f967ac_47e973b7fa2347d3af221983eeb2fa46.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/bf3aed2e-687a-4c02-8302-f19ba5dc22fa/kumon_math_books_grade_7.pdfIn PDF document text
    • https://fc06435f-e709-4c80-b59d-96fa470c1a13.filesusr.com/ugd/bdc04d_01e0d3e1518e4009a2e2577f984318d2.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tozaduliwubega/86927947946.pdfIn PDF document text
    • http://wodowepakimeko.onlinewebshop.net/davagufatimalizokiwesuxe.pdfIn PDF document text
    • https://s3.amazonaws.com/debamijizozexo/xavazokewaxegogotan.pdfIn PDF document text
    • https://s3.amazonaws.com/tasufagijaremo/bibliography_format_in_turabian_style.pdfIn PDF document text
    • https://e25b5f36-ee09-4010-8803-019b2853a23b.filesusr.com/ugd/c34eac_e6a67f6e928643f797ed163e1596b17b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/petikamov/showbox_onto_android_box.pdfIn PDF document text
    • http://dinedolorexos.rf.gd/safe_work_method_statement_template.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_off0000ed68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED68 5276 bytes
SHA-256: 13cd06450813776bd4ba48333c2259fa34b3709f6f33a15257abf25de22b01cc
font_01_sfnt_off0000ff79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF79 11264 bytes
SHA-256: 34112057a6a7090995c1249a09b420a157be7fc82085a81dfb173f34d470e9d6