Malicious PDF — malware analysis report

Static analysis result for SHA-256 17205debee02ea18…

MALICIOUS

PDF

69.0 KB Created: 2021-04-08 03:17:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 4cf21bcdc30606daf8d210dd1193fec1 SHA-1: 1013e75d7cc5c47b9c6b4bb29b0aa353c0616ab3 SHA-256: 17205debee02ea189b752fb3af8ad3a112cf002a28c8cf56318ec5363715a7fb
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://xezojetit.ru/wix?keyword=red+rhino+fireworks PDF link annotation
    • https://buliduxefexefux.weebly.com/uploads/1/3/1/6/131636978/bupin.pdfIn PDF document text
    • https://cdn.sqhk.co/godanalumado/iKjcWdx/bigudaridabetexam.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382187/normal_60473196b10b5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418399/normal_5fd0bd7568212.pdfIn PDF document text
    • https://cdn.sqhk.co/lukapokobejo/TgiWCia/bird_of_paradise_plant_meme.pdfIn PDF document text
    • https://babuzusevajuwo.weebly.com/uploads/1/3/4/8/134878483/jifetopupapema.pdfIn PDF document text
    • https://zogopovedizojux.weebly.com/uploads/1/3/1/4/131408172/2ed6460a53.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4505358/normal_5ff2043c3b541.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368477/normal_605a2239a7b57.pdfIn PDF document text
    • https://cdn.sqhk.co/xubodijixali/ihaicK0/sibumubig.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/babuxufarizuxur/wisirenifaxim.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/76e88640-c589-4b42-b8ea-bda6e062aaea/construct_2_3d_tutorial.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e5cb0947-1aba-4f75-9cbd-6c7588057439/2525560527.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/96d2b5b3-de69-492c-ae0e-b1ba38495dd9/42250146311.pdfIn PDF document text
    • https://s3.amazonaws.com/palevijuj/carlsberg_annual_report_2007.pdfIn PDF document text
    • https://71b34470-2e60-4936-811b-9f14cb47e32b.filesusr.com/ugd/1dbbf0_6bb5753712ef460180a290351e2e5417.pdf?index=trueIn PDF document text
    • https://bf23b77b-49a9-4bef-a898-a03cfb94aefa.filesusr.com/ugd/134172_9900f53afb7543db888067a3663956cc.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lolijexejomak/probability_and_random_processes_3rd_edition_solutions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9f9360bf-be22-408b-af98-803cd80bc6cd/how_to_respond_to_a_good_yelp_review.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_off0000d0c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0C5 4916 bytes
SHA-256: 4717c7f69332489833ec859c29eb6340a4f3f06d953def4ce8522b58b322093e
font_01_sfnt_off0000e191.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE191 10396 bytes
SHA-256: cbb2f9560343d726ec4fdd9544882a70678f731da531fe4638333e5aeca6060d

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