Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0c1ff19b24e12b8…

MALICIOUS

PDF

107.8 KB Created: 2021-03-16 19:44:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 4441319b057be5fe6f5469f9330cb17d SHA-1: 24528dd0c599c91bcf389cd77bb967b906f78d1a SHA-256: e0c1ff19b24e12b882c0c446a372d96fc8b24caf52e762bc5cbaca1df8f629a7
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. The PDF contains a large number of external links, with one prominent URL pointing to a suspicious domain ('resalured.ru'). This suggests the document is part of a link farm or phishing campaign designed to redirect users to malicious content. No scripts were extracted, but the PDF structure itself is indicative of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://resalured.ru/wix?keyword=roberto+duran+net+worth+2019 PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4426813/normal_6007f4e99d25b.pdfIn PDF document text
    • https://dafufiwe.weebly.com/uploads/1/3/4/3/134368649/d2880.pdfIn PDF document text
    • https://pidakulosa.weebly.com/uploads/1/3/4/3/134391257/newigezepinif.pdfIn PDF document text
    • https://jorosovepi.weebly.com/uploads/1/3/4/7/134706332/6331402.pdfIn PDF document text
    • https://mejodedasebedo.weebly.com/uploads/1/3/4/7/134725949/kefovexajabedunapub.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392659/normal_604790bebcf16.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368495/normal_5ff850f9147fd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388620/normal_60149e8b54df9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373769/normal_603f32a86871d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471256/normal_5fd8e7fc4d5b3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424024/normal_5fe52dd2ac285.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/zerejibixupav/36661095735.pdfIn PDF document text
    • https://s3.amazonaws.com/wurivuve/how_many_heart_pieces_links_awakening.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c113c97e-788f-4792-9c33-5528dcfb74b2/how_much_weight_can_a_plastic_pallet_hold.pdfIn PDF document text
    • https://s3.amazonaws.com/pekatikisuruki/10_day_green_smoothie_cleanse_modified_results.pdfIn PDF document text
    • https://s3.amazonaws.com/vatosolikijike/zogizu.pdfIn PDF document text
    • https://s3.amazonaws.com/gixawetopoli/cp_plus_kvms_pro_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/roxawo/63191163979.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1f474bd3-0ebd-497a-81a1-97d7fa52b4b7/kawasaki_engines_gear.pdfIn PDF document text
    • https://s3.amazonaws.com/gowebabuxogiro/brother_mfc-240c_not_recognizing_ink_cartridge.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_off000166dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x166DC 5424 bytes
SHA-256: f28f9a2f20f1dfded842c6279afc07e02459d1e92f84832a9f3c3414768a9238
font_01_sfnt_off00017959.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17959 12664 bytes
SHA-256: 5908134ecd4ea8eee6072f93a455d9931028018696fe203b37db452340a6d338

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