Malicious PDF — malware analysis report

Static analysis result for SHA-256 93b9de570fbbad74…

MALICIOUS

PDF

93.1 KB Created: 2021-05-29 21:47:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: b743d5cb903b98dcd26e5a48433c2758 SHA-1: 741f0b52298c2fc90f92ff2de84e7034f1488a8b SHA-256: 93b9de570fbbad74f8b443e684e06e1fc6aaa3afb63dace2e9873c1b9e8e4128
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are dynamically generated and point to other PDF files, indicating a link farm or SEO abuse tactic. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or distributing further malware. The embedded URLs are the primary indicators of compromise, directing users to potentially harmful content.

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://lozipotod.ru/strik?utm_term=a+traves+de+la+biblia+notas+y+bosquejos+pdf PDF link annotation
    • https://xiwaxodo.weebly.com/uploads/1/3/4/3/134319271/bavipizamarabenuveb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496014/normal_5fd35852ecfd5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4472753/normal_5fcd548396827.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408586/normal_6066668de39c7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460232/normal_5fde9d5c63492.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4458132/normal_5fd0601b064ae.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444117/normal_60583df3ec37a.pdfIn PDF document text
    • https://xusukimijep.weebly.com/uploads/1/3/2/6/132681495/9861ad760f2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385231/normal_6040eeb67850f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4488141/normal_5fc99b841bb6c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481828/normal_60623e8953012.pdfIn PDF document text
    • https://raxuvutozorar.weebly.com/uploads/1/3/7/5/137512290/18c8c9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4406466/normal_5fffa905d1e71.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/258693b1-c70b-49ec-a607-f5cca8e8a0e3/how_to_hack_star_warfare.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/98b943e2-4429-4f07-9a13-03880c1a765a/gofotimibadafetokozez.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/903f5ee1-0680-41c6-8cc1-9d4209fa44b3/56730267376.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0d1596e2-5aa0-4940-a480-d968ca98064d/how_to_reset_an_lg_sound_bar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9bae6d3d-13e9-4605-88b9-3fadb63deb2f/groove_essentials_1.0_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8bb41f19-945b-4b47-8226-777ed943ace7/short_run_and_long_run_cost_curves_in_economics.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_off0001274b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1274B 5528 bytes
SHA-256: 9a1bf4e72c230ffe6bc61b42980b2a39e70ba3c8af5a50f0a86b92f0ea28e5fb
font_01_sfnt_off00013a2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A2C 13568 bytes
SHA-256: ec2ccd8231fdc1e49d1ea14c3aa4bf3ac09d4e4f3b36fc8a3a1a73e2989a6a47

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