Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d1a994d4c4e8752…

MALICIOUS

PDF

67.6 KB Created: 2020-11-18 22:24:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: bbb2307c86ab89631788e88ccdbcf530 SHA-1: 909c8d3017214bdad7cb66bdd196dc0b8208c4ba SHA-256: 2d1a994d4c4e8752491aa08deac3ea0b61771e66dc125f0b49687cbac68af0d3
156 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9998

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://traffking.ru/strik?utm_term=proline+21+user+manual PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4461791/normal_5fa704fa4f392.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487413/normal_5fb25b438e6c5.pdfIn PDF document text
    • https://jaserasozupog.weebly.com/uploads/1/3/1/4/131454215/juzewuruborefibu.pdfIn PDF document text
    • https://liforofejot.weebly.com/uploads/1/3/4/3/134350560/7747378.pdfIn PDF document text
    • https://vonolorijamitef.weebly.com/uploads/1/3/4/4/134452045/gexez.pdfIn PDF document text
    • https://rejudizik.weebly.com/uploads/1/3/4/7/134701546/davepexogusonu.pdfIn PDF document text
    • https://poxaneduwi.weebly.com/uploads/1/3/4/2/134234601/7175769.pdfIn PDF document text
    • https://mutazodot.weebly.com/uploads/1/3/0/8/130874237/fogepet.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/c8d365a9-c15c-4897-ba16-72e6e0055aba/xibugubedu.pdfIn PDF document text
    • https://s3.amazonaws.com/fazujo/arbonne_30_day_plan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6ea42f15-d622-4c98-9c59-1d691f41112f/32119370876.pdfIn PDF document text
    • https://s3.amazonaws.com/vawoginele/polk_county_assessor_iowa_gis.pdfIn PDF document text
    • https://s3.amazonaws.com/mefadedosuw/4778032124.pdfIn PDF document text
    • https://s3.amazonaws.com/veraxawewib/creating_defect_reports_in_jira.pdfIn PDF document text
    • https://s3.amazonaws.com/muvemasoxaji/84565116158.pdfIn PDF document text
    • https://s3.amazonaws.com/bifamomove/the_outsiders_chapter_3_questions_and_answers.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_off0000ce3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE3A 5016 bytes
SHA-256: 3ba5a98b08d6b8f6f0f59607916cd68b1a94005ab37cf41ad5a830d7e35e636f
font_01_sfnt_off0000df2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF2F 9928 bytes
SHA-256: 0af29e028af1e24e2ae269c63d9b041e9207ff3ddeba5bb06611f1eb6ee17499

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