Malicious PDF — malware analysis report

Static analysis result for SHA-256 993613dd88703ebf…

MALICIOUS

PDF

77.4 KB Created: 2021-03-21 01:02:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 2b8ef8b117ce147baf20c54357a84172 SHA-1: 1483a6066ddf0716538cfdf5115538e281c361e5 SHA-256: 993613dd88703ebf13941da9e9c9dae8f9049988abc9277cad767abacbb1d9c3
156 Risk Score

Malware Insights

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

The PDF file contains heuristics indicating it is a link farm and has been flagged as malicious by ML classifiers and ClamAV. The embedded URL points to a domain that is likely used for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and the presence of external links suggest an attempt to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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 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.
  • 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://mezovuduw.ru/award?keyword=types+of+bearing+with+images+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4477139/normal_5ff38e0a4db5f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445558/normal_5ff9b5549d211.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392660/normal_601e56bf20165.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480905/normal_6015806dd448d.pdfIn PDF document text
    • https://kesoxebexug.weebly.com/uploads/1/3/2/6/132681937/8841446.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476123/normal_604fed353349a.pdfIn PDF document text
    • https://pokotozumunas.weebly.com/uploads/1/3/1/4/131453498/ridazexumo.pdfIn PDF document text
    • https://kapilike.weebly.com/uploads/1/3/4/6/134686456/7569395.pdfIn PDF document text
    • https://jitosagar.weebly.com/uploads/1/3/4/3/134318128/4558df9d9901.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/kosamupim/kirchhoff_s_law_worksheet_with_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d7a7f18d-17cf-445f-8bf0-1b994264cb8d/bram_stokers_dracula_full_movie.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1f1940b1-d203-46c3-8c21-32d4bde5bbe8/price_of_generac_whole_house_generator.pdfIn PDF document text
    • https://s3.amazonaws.com/bidurudilidujug/96066472852.pdfIn PDF document text
    • https://s3.amazonaws.com/dudurat/36310031034.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/65f120f3-fbaf-4201-87ed-25755d838ca9/jiwuriroladam.pdfIn PDF document text
    • https://s3.amazonaws.com/dotivaf/policy_approval_process_template.pdfIn PDF document text
    • https://s3.amazonaws.com/varoximu/iq_test_questions_with_answers_in_urdu_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/busutafitufe/32210165600.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f93bdce7-2ed5-4291-9608-45c6867903af/wowaka.pdfIn PDF document text
    • https://s3.amazonaws.com/wezukep/wexurabuguzareranune.pdfIn PDF document text
    • https://s3.amazonaws.com/wogikokuzotaxa/64757013778.pdfIn PDF document text
    • https://s3.amazonaws.com/viwoxuz/lakshmi_stotram_in_telugu_download.pdfIn PDF document text
    • https://s3.amazonaws.com/vovuzize/edtpa_task_2_instruction_commentary.pdfIn PDF document text
    • https://s3.amazonaws.com/bejeseja/68748689608.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_off0000f224.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF224 5708 bytes
SHA-256: 5164cd6ca26a2ea88adadae823570525eb86e32abab45c3888842b4e2794265a
font_01_sfnt_off00010577.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10577 10164 bytes
SHA-256: eec626f34f694b87266ea7fcbdde448d1ae908aa3025b497b63f93ad7f5a6d16

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