Malicious PDF — malware analysis report

Static analysis result for SHA-256 bfd32455bb9c58e4…

MALICIOUS

PDF

73.2 KB Created: 2021-05-21 12:13:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 3c31ee6030d44bea2814e27f47148062 SHA-1: 26d3c341378f736bd8cd223a28e56f230a36c129 SHA-256: bfd32455bb9c58e47449413be05a08abf1aaa40b028a5858f1a8d3d0ce373738
96 Risk Score

Malware Insights

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

The PDF file contains a URL that mimics a search result for VMware ESXi software, likely intended to trick users into downloading a malicious payload. ClamAV and ML classifiers strongly indicate malicious content. The embedded URL is the primary indicator of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://vilenefex.ru/strik?utm_term=vmware+esxi+6.0+iso+download+free PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4372980/normal_5fcf3f6fb66d7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389599/normal_602a4c4b8feea.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487413/normal_605dbfe73f016.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469827/normal_5fd662b8c78b9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4373778/normal_5fdfae3d4361d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489839/normal_603ae8847f6d7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376850/normal_604cd96743b1e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460072/normal_5fea4603a198b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459774/normal_60523a1254954.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495055/normal_603b914b639f4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417024/normal_6046cbe998c94.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/010e1234-2de6-4855-9254-ad3f00d1215f/miss_adele_amidst_the_corsets.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bf39a790-c106-4a62-b17f-a5ac652befa8/95229094571.pdfIn PDF document text
    • https://s3.amazonaws.com/paropabaru/livre_guide_de_survie_des_jeunes_retraits.pdfIn PDF document text
    • https://s3.amazonaws.com/gozilum/xisozawojuzadilaleguvejov.pdfIn PDF document text
    • https://s3.amazonaws.com/rekawexuretowo/how_many_months_does_navy_training_last.pdfIn PDF document text
    • https://s3.amazonaws.com/savifin/dreamweaver_8_for_windows_10.pdfIn PDF document text
    • https://s3.amazonaws.com/sojuravewi/farm_lease_agreement_template_south_africa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a62b38f9-56bf-491b-89f5-e12484e55c48/what_does_fire_and_blood_mean.pdfIn PDF document text
    • https://s3.amazonaws.com/dazinibonofobi/how_to_write_twenty_hundredths_in_decimal_form.pdfIn PDF document text
    • https://s3.amazonaws.com/biwubeleba/thanos_meme_template_endgame.pdfIn PDF document text
    • https://s3.amazonaws.com/migivewuwe/fractional_distillation_worksheet_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/vabedafozo/rascals_movie_ringtone.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_off0000dfd7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFD7 5508 bytes
SHA-256: 62a6370e2455efed72dfb1ead9a08f254a657670c6a9e38cc00dac04823bf188
font_01_sfnt_off0000f295.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF295 10712 bytes
SHA-256: 61c73092647eda1a3ba6b574bae89a3c65a7a946b5a24cea426d373d423d93ab

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