Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2408d2fbec707ab…

MALICIOUS

PDF

67.2 KB Created: 2020-12-16 19:32:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 54b970261dac2064b7ae0ec9fa30aa68 SHA-1: 9b93609577dfbfa8de90655f515dfc183cb1223f SHA-256: a2408d2fbec707abe55843b557b6c303c6362a62487236cead7ec2cb3b88d4da
186 Risk Score

Malware Insights

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

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 0.9996

Heuristics 6

  • 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.
  • 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://trafffe.ru/strik?utm_term=lee+value+turret+press+kit PDF link annotation
    • https://ruxodinari.weebly.com/uploads/1/3/4/3/134377607/tupubusajigum-zovevuzut-xivaruwet.pdfIn PDF document text
    • https://kobetuditi.weebly.com/uploads/1/3/4/4/134446504/pobipisasatazo.pdfIn PDF document text
    • https://bexatumabe.weebly.com/uploads/1/3/4/8/134852132/3295275.pdfIn PDF document text
    • https://zojokoladateru.weebly.com/uploads/1/3/4/4/134497877/lisimume.pdfIn PDF document text
    • https://lajogaful.weebly.com/uploads/1/3/4/4/134481829/25df5c441f7.pdfIn PDF document text
    • https://mofalapew.weebly.com/uploads/1/3/4/3/134307760/senebu.pdfIn PDF document text
    • https://zuzekogidu.weebly.com/uploads/1/3/4/6/134699906/8f5ca0f3d.pdfIn PDF document text
    • https://danikobunib.weebly.com/uploads/1/3/4/7/134755608/1754431.pdfIn PDF document text
    • https://xisuviwilizej.weebly.com/uploads/1/3/4/3/134320176/retuge-zotexixala-vofamo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/pojojagajevuxa/13384711288.pdfIn PDF document text
    • https://s3.amazonaws.com/midizaxopazeji/autograph_tamil_movie_video_song.pdfIn PDF document text
    • https://s3.amazonaws.com/waxejajinigafu/open_ports_windows_defender.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc4e6c8df132613bbd7397d/t/5fcbb93611c29807e6dff6d3/1607186742860/best_fruit_carving_tools.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b48e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB48E 2940 bytes
SHA-256: 5abd1102bbb49cd9fee3e8c7db4f4b96944035d8cd52b1c4794f50b825db5b40
font_01_sfnt_off0000bf1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF1A 4544 bytes
SHA-256: 54ed9ff6234274b36e606c493a249bac495b5373145742eb6b4a8bd637f3ef49
font_02_sfnt_off0000ce9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE9F 10184 bytes
SHA-256: 7fc91c7ac80777dc9dfcf67b26b47246ed44d46f5b99e79cb370f7b11936ba25
font_03_sfnt_off0000f17f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF17F 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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