Malicious PDF — malware analysis report

Static analysis result for SHA-256 47414122c1cdd03b…

MALICIOUS

PDF

79.9 KB Created: 2021-03-18 06:23:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 5e24e60abe702252d0808ae25151fa24 SHA-1: 7786e165c098ffe1dd2db0219a9301e41a2006a4 SHA-256: 47414122c1cdd03b21138d612b159449af5688e5b3c368eecbbf77ca4924d8bb
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file is identified as malicious by ClamAV and an ML classifier, indicating a high probability of malicious intent. It contains a large number of external links, suggesting it functions as a link farm, potentially for SEO manipulation or to redirect users to malicious sites. The presence of multiple disposable hosting domains further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 6

  • 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 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://fokemale.ru/strik?utm_term=should+you+wake+up+someone+having+a+nightmare PDF link annotation
    • https://fanarise.weebly.com/uploads/1/3/4/3/134377412/d9a2fe0b5d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373769/normal_6042d0a3becb3.pdfIn PDF document text
    • https://vawoxaju.weebly.com/uploads/1/3/1/3/131379227/7734b5f0f5cc1fb.pdfIn PDF document text
    • https://gidutuzewefira.weebly.com/uploads/1/3/1/3/131380066/1ce6c74193a8c12.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4373520/normal_5feb0d14da0c9.pdfIn PDF document text
    • https://javesuput.weebly.com/uploads/1/3/0/8/130873829/47145c442.pdfIn PDF document text
    • https://zibefaxad.weebly.com/uploads/1/3/4/5/134594794/kediwuwelidekopix.pdfIn PDF document text
    • https://satizivuzaked.weebly.com/uploads/1/3/4/3/134383512/dezexetepu.pdfIn PDF document text
    • https://xudarusutovupaf.weebly.com/uploads/1/3/0/8/130814591/gadozujevipurobag.pdfIn PDF document text
    • https://zitozujenuzudip.weebly.com/uploads/1/3/4/0/134042901/1211073.pdfIn PDF document text
    • https://warolola.weebly.com/uploads/1/3/4/6/134600536/4882751.pdfIn PDF document text
    • https://viwutexotopuj.weebly.com/uploads/1/3/4/5/134522905/3922193.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dabogubomukifu.rf.gd/watugupanixigab.pdfIn PDF document text
    • http://dujazenemelix.epizy.com/hp_laserjet_p2055dn_driver_for_mac_os_x_10.15.pdfIn PDF document text
    • https://931f52e6-cb68-4a93-8e02-54808d33f8b6.filesusr.com/ugd/6290de_5151a090ecf64ee9b3602a8931a5792b.pdf?index=trueIn PDF document text
    • https://b03e51a8-7171-48c0-94d6-e4c032e6f37f.filesusr.com/ugd/9421c8_d1715edb945a4e7987e6f4e282070c50.pdf?index=trueIn PDF document text
    • https://aa4de0c4-a7fb-47f6-97fe-5721705e71c1.filesusr.com/ugd/824332_5db9a90d859748dbbc0b3616933fbad7.pdf?index=trueIn PDF document text
    • https://62abf401-5fc9-4991-ac00-cb6a0c8cf8ec.filesusr.com/ugd/e4ff69_8dfde0b9657b46849dfaee9fdaa036d5.pdf?index=trueIn PDF document text
    • https://709e7e89-b264-4d73-b757-064736ed86f1.filesusr.com/ugd/f523c3_521e828f876e43d1b62a5ebaf4350725.pdf?index=trueIn PDF document text
    • https://1058d175-53f8-4d86-9201-ae9c1fc74009.filesusr.com/ugd/62a633_62e46d053f874cbb8fd5047ec0e22f69.pdf?index=trueIn PDF document text
    • http://suvoxezol.rf.gd/xupize.pdfIn PDF document text
    • http://kadelidiror.epizy.com/johnsons_reconstruction_plan_strengths.pdfIn PDF document text
    • https://504706c9-3a86-45eb-876a-6494ef133fff.filesusr.com/ugd/80c1db_207231fbad074b0fb56b7f918bac66ff.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_off0000f866.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF866 5792 bytes
SHA-256: 06ecc4712c16b6f222d744f76a04bb3b6c128a2f2e0ece98dd7788f55add2395
font_01_sfnt_off00010c12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C12 11080 bytes
SHA-256: 0fa055c6548bc2eab1f28097d250996b2d729c6e34bf2979e21908b722a8859a

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