Malicious PDF — malware analysis report

Static analysis result for SHA-256 f83d5baf26d8b3ea…

MALICIOUS

PDF

94.5 KB Created: 2021-05-22 20:32:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: f6e92625e2437dfadd62eceefd203d5c SHA-1: 73ada8b713b0581e3148ddb9c9aa4073ecbbb12a SHA-256: f83d5baf26d8b3eae6c93e297e61788c59488ed744fc3466954c35db88a6bd27
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. The document contains a large number of external links, many of which point to PDF files hosted on platforms like Weebly and Strikingly, suggesting a link farm or redirection scheme. The primary URL, https://leonvi.ru/strik, appears to be part of this scheme, likely leading to further malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://leonvi.ru/strik?utm_term=atharva+veda-black+magic+pdf+in+kannada PDF link annotation
    • https://vudubigudimuw.weebly.com/uploads/1/3/4/0/134016717/xopabofe.pdfIn PDF document text
    • https://peniwifagupe.weebly.com/uploads/1/3/0/7/130738894/9136084.pdfIn PDF document text
    • https://lapifebe.weebly.com/uploads/1/3/2/6/132695874/vebibebijutev.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473379/normal_5fdc49d6e8dab.pdfIn PDF document text
    • https://mijolepeworid.weebly.com/uploads/1/3/5/3/135394353/5617029.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388169/normal_600a98c7e08ba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484169/normal_5fd0e84b2bc96.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/kexamoxusinixu/15146896552.pdfIn PDF document text
    • https://s3.amazonaws.com/tokit/43673560225.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/396c4807-d72d-4bf4-82bf-b9366a9fbe55/how_to_get_hired_at_chick_fil_a_corporate.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/12b59cec-ade2-4ac7-a53d-c6220946fd1d/72116943054.pdfIn PDF document text
    • https://s3.amazonaws.com/pisik/42712738048.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4f4f8cab-50f8-4951-9e33-db6547930223/network_and_computer_systems_admin_jobs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/79e50c6d-4010-40c3-a5f3-db11ffd65b22/ar15_operation_gif.pdfIn PDF document text
    • https://s3.amazonaws.com/padosumifubobo/all_basic_guitar_chords.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ba306b1a-fe04-42cc-94e1-81ee785f20a0/741709074.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/59e68e1e-63ca-46a5-9478-bf79e13013a5/is_there_a_new_twilight_coming_out_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8299e46c-44d8-4ff9-b946-570e47d1e1fd/exercises_to_improve_report_writing_skills.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e1cf8a90-2d47-4144-8c6d-4fc6f981271b/13251101063.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b490ad59-10de-4313-8739-9307fa26323c/how_to_use_ryobi_hedge_trimmer_attachment.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/85f33a16-a6cc-4513-9324-0dfdcefba19f/serato_dj_pro_macbook_air.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_off000131f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131F2 5676 bytes
SHA-256: fb3aac1c0b84e488a033fe4fb4bb43cadc37f9e8d05a8bcca4bcbd95c631767d
font_01_sfnt_off0001452a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1452A 11608 bytes
SHA-256: 4dea0d6773bb881ccffdad5793e2dbdb4d574c09bcc07235339e5c279d54fd1e

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