Malicious PDF — malware analysis report

Static analysis result for SHA-256 c9e6b356d3134f72…

MALICIOUS

PDF

75.4 KB Created: 2021-03-14 00:53:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: d7fd420a0e41a0ece937ee569af97978 SHA-1: 930f0caa12ad8ffeb859ae048c1450b56bf28f81 SHA-256: c9e6b356d3134f7221483e29ac33845820f56e3f896cc22f82ee96e569b1fb6a
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many pointing to disposable domains, suggesting it's part of a link farm or SEO manipulation scheme. The primary URL `https://mezovuduw.ru/wix?keyword=pinoy+tambayan+movies+replay` is likely a lure to redirect users to further malicious content or phishing pages.

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://mezovuduw.ru/wix?keyword=pinoy+tambayan+movies+replay PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4468540/normal_602ee6928e2e7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446776/normal_60045be01a180.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491432/normal_6046710d282f3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423189/normal_601a088f78db1.pdfIn PDF document text
    • http://rumepado.mypressonline.com/what_is_programmed_instruction_in_tamil.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416318/normal_602be115edbfe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384026/normal_60461f24726a7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452845/normal_5fd358ee14842.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388282/normal_5fced7429cdc3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388174/normal_600adc9b394ec.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480899/normal_601b435abec62.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365607/normal_5fc660118b26d.pdfIn PDF document text
    • http://wativeb.mypressonline.com/10308936281.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453890/normal_5fde0e6520e55.pdfIn PDF document text
    • http://jekeluxuto.mywebcommunity.org/80093517081.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402481/normal_5fedf3c326ea1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://48bd7725-9370-4d18-884e-e75d7b70c9c4.filesusr.com/ugd/f241d9_e43728628e9042debe3fa59c8d87c42b.pdf?index=trueIn PDF document text
    • https://67258aaf-84c5-4a88-bfd2-1aa7ddb6c27a.filesusr.com/ugd/850f07_13dbb8500b1e4151b55cfe5772ebff09.pdf?index=trueIn PDF document text
    • http://tirisesu.onlinewebshop.net/52615889758.pdfIn PDF document text
    • https://9db8f275-5044-409a-aa1b-3306d9dda9bd.filesusr.com/ugd/361f4b_51c6429bf8de4d969972192a33ae7b53.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_off0000eb32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB32 5268 bytes
SHA-256: 6084182a614b30f82687dc5ea3652faf60e6e19476bb0fdc57d680ff15031fad
font_01_sfnt_off0000fd0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD0C 10572 bytes
SHA-256: b2fa86ac456ba0ca14000e15c1c113a96e057f75da2bc237a2582b5961b758cf

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