Malicious PDF — malware analysis report

Static analysis result for SHA-256 565ea288a90428a0…

MALICIOUS

PDF

79.8 KB Created: 2021-04-14 04:47:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 59f616e378b216999d7243dc62bc5f59 SHA-1: d8f5d5b70d5273be2a7de81c337ee09619a4e8d7 SHA-256: 565ea288a90428a0b3df57a3e4114b9b5b326bb117bfc6af512b4dc9eeffc7ec
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://crophysi.ru/strik?utm_term=the+leftovers+season+3+episode+6+review PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4488815/normal_5fe1602f3eb3c.pdfIn PDF document text
    • http://guwejusu.22web.org/employee_engagement_survey_results_template.pdfIn PDF document text
    • http://wukijomenanop.iblogger.org/ginowewuji.pdfIn PDF document text
    • http://didavixakodix.22web.org/blood_sugar_sex_magik_lyrics.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480758/normal_604496ea4364e.pdfIn PDF document text
    • http://vadosixajobirug.mygamesonline.org/astm_steel_grades_chart.pdfIn PDF document text
    • http://powajaxib.medianewsonline.com/how_do_i_pair_my_costco_hearing_aids.pdfIn PDF document text
    • http://dovurulegusima.22web.org/nirenavutopux.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://c5c27394-2042-4749-9b39-d1c24dcbd9f0.filesusr.com/ugd/e9b987_c4bdad7e02b74144bddc3fa766a3345e.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/c229f542-8da3-43ef-b967-cad4fcdd4d4f/tobumumija.pdfIn PDF document text
    • https://4f0f5a39-0a2f-4cdf-b4e4-40a644fad8b9.filesusr.com/ugd/2024fe_167478c842bc4c54bec92200085cc270.pdf?index=trueIn PDF document text
    • http://resifukizuve.rf.gd/nibafor.pdfIn PDF document text
    • https://30de3caf-c510-4ce9-8691-b8280dc60d9b.filesusr.com/ugd/4980ee_c5f5b78bea9941ad8ecbe0f77368ac77.pdf?index=trueIn PDF document text
    • https://61069a5e-3c5f-4884-a3c7-8c7552058b74.filesusr.com/ugd/0789d5_67044e4231a042ffb2bb141e9c1b339e.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/e81b6b64-3fe5-4a4e-8ba6-81e2fdfd8cf9/gutenori.pdfIn PDF document text
    • http://noxoxuf.rf.gd/evenflo_infant_car_seat_cleaning_instructions.pdfIn PDF document text
    • https://356bbf58-84af-4bff-99a9-d03346e46411.filesusr.com/ugd/b5472a_565b431026f84a129e4737b386480bbf.pdf?index=trueIn PDF document text
    • http://dejamatokato.rf.gd/kupixolagujizofovegovo.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_off0000fa6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA6F 5548 bytes
SHA-256: ebbc5a75c2bed6c19b644251d2ce01441bbed21be7138ba70c9744f5a2643514
font_01_sfnt_off00010d57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D57 10808 bytes
SHA-256: 5b6f8fcfca1387300f5c7d10b0a213fec095d124587983779d83fb4bf853bde2

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