Malicious PDF — malware analysis report

Static analysis result for SHA-256 96b04dd082c8df2d…

MALICIOUS

PDF

72.9 KB Created: 2021-04-01 10:05:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: aae73396276bbe36da5c3bae3de3a0fc SHA-1: aff244199daf63408803d6dd21a4d68bd272276a SHA-256: 96b04dd082c8df2dbbe42d7945975a0cb41f5cca3e456368fa559ca692105876
186 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 0.9997

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://leonvi.ru/wix?keyword=wamsutta+dream+zone+fitted+sheet PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4366050/normal_60232f1daa5e5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488133/normal_6052b13c20f3c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4491934/normal_5fcc8e7f5af32.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369779/normal_601f6e577f0d5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495854/normal_5fe92ad436811.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389599/normal_5ff897601e8bc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481067/normal_5fd3293b99401.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rajokonola.epizy.com/74568523409.pdfIn PDF document text
    • https://d2ea4bfc-f92a-4379-acf2-d9b69981ddb7.filesusr.com/ugd/739437_5c52bf5c22464d3c84ac0b58fc9d67ce.pdf?index=trueIn PDF document text
    • https://170a7d3c-74f0-42f5-9ead-98ae292a4922.filesusr.com/ugd/a18aa6_0de8e6bfdea44dd9bf74ec7a70d5822e.pdf?index=trueIn PDF document text
    • http://boxawigituwa.rf.gd/use_of_computer_in_e_commerce.pdfIn PDF document text
    • http://telenusu.epizy.com/33460175295.pdfIn PDF document text
    • https://s3.amazonaws.com/lixisariwulo/zofedodikowezedigadawex.pdfIn PDF document text
    • https://c216880a-03a2-4774-ab7e-121c93799e8f.filesusr.com/ugd/b5aed9_0a04b9a2d0c54abeaeb797c87670f211.pdf?index=trueIn PDF document text
    • https://93dbb2ad-f1e8-4c6c-adfd-2ef134399473.filesusr.com/ugd/df4650_c537148872e440e5945e9dee0efb4d5f.pdf?index=trueIn PDF document text
    • https://781b76d0-895c-4d4e-90f3-491762fad171.filesusr.com/ugd/894952_f4c88fd2f0eb447ea77486c2ceea064d.pdf?index=trueIn PDF document text
    • https://299bc67c-4c9a-44ea-852c-18f2d39dca40.filesusr.com/ugd/954c8b_7dc18bd175314bc6b02a6da5fa1fbf32.pdf?index=trueIn PDF document text
    • https://d04c2b29-3777-4fe6-aaa9-ab96f87c3324.filesusr.com/ugd/43eb95_453689f5e2e146b3a4c9831fca41a381.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dinisemowoge/breakfast_menu_template.pdfIn PDF document text
    • https://07d68bf2-0661-47e2-9ffe-eae068a071af.filesusr.com/ugd/fef806_2970da9bebc84baba30d8512d7ef436d.pdf?index=trueIn 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_off0000e0e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0E6 5180 bytes
SHA-256: 930cb8a1531ae24292006755a39b61080822e8589b353969c9b2f3466571cc2c
font_01_sfnt_off0000f26b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF26B 10688 bytes
SHA-256: f44a8862fa86414c3db8725e76f4883afbe54de4fd7496c7a2d09fc2a2d5d02d

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