Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5bdf1fe4edc1820…

MALICIOUS

PDF

76.1 KB Created: 2021-04-05 18:36:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: d3a2853ddca1d496d024009780af17bb SHA-1: 1d2ac0d709205a888fa6fd728856373178ea7399 SHA-256: f5bdf1fe4edc18201535acd8c684caf21bacb39f5d0d55a1a799a1173d3a6bd4
214 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing indicating it links to known malicious redirector infrastructure, specifically a URL related to 'epson workforce 600 wireless setup'. Another critical heuristic identifies it as a PDF SEO link farm, containing numerous external links. The ML classifier and ClamAV detection strongly indicate maliciousness, likely phishing or malware distribution.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/strik?utm_term=epson+workforce+600+wireless+setup In PDF document text
    • https://biwopotalar.weebly.com/uploads/1/3/1/4/131438783/rakoperixipuvamo.pdfIn PDF document text
    • https://lejegibovijidup.weebly.com/uploads/1/3/1/4/131438293/6836c388.pdfIn PDF document text
    • http://shoop-fn.ru/kedovukadetijidux63y33.pdfIn PDF document text
    • https://galixasuja.weebly.com/uploads/1/3/4/5/134518214/rewodejerado_nirep_tinotipatotolud_segojuw.pdfIn PDF document text
    • http://fastdonwload.space/hp_folio_9470m_specsd28lj.pdfIn PDF document text
    • http://natlab.ru/kajizi1a3je.pdfIn PDF document text
    • https://toxodapakaxoza.weebly.com/uploads/1/3/4/5/134525452/lebawununimagu.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/gosete/polaris_trail_boss_250_2_stroke_top_speed.pdfIn PDF document text
    • https://s3.amazonaws.com/zazelujeju/66576369424.pdfIn PDF document text
    • https://s3.amazonaws.com/jawusawar/tudavolupi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e35463b-bc14-4f5f-beb4-de2b18614262/how_to_reset_a_bosch_ecosense_dishwasher.pdfIn PDF document text
    • https://s3.amazonaws.com/posufij/asteroids_meteors_and_comets_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ce0f7ab3-7976-426c-baa3-74c15f07dbe8/honda_hrc216_commercial_mower_for_sale.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dce770f2-347a-4986-993e-8eb1c0ef6192/62883044719.pdfIn PDF document text
    • https://s3.amazonaws.com/leteraxewe/bimorafabo.pdfIn PDF document text
    • https://s3.amazonaws.com/memexelu/camtasia_studio_9_softonic.pdfIn PDF document text
    • https://s3.amazonaws.com/kezemiradigu/pazovubujoviraruxerow.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c2f23844-6b18-4c54-98c3-ec46b8f7c351/81301051008.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_off0000eba7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBA7 5208 bytes
SHA-256: 28f4b52f96baa97ea69f9f9db5ba01dd570b549e173f25a25f6f2cf6993fdb0e
font_01_sfnt_off0000fd90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD90 10916 bytes
SHA-256: 43b733abb39ec6c67b9caf882a8fe3d82c653a6231ff11e8553429b791849c68

Open this report in the interactive analyzer, or submit your own file for analysis.