Malicious PDF — malware analysis report

Static analysis result for SHA-256 76fafc40375ea94d…

MALICIOUS

PDF

77.0 KB Created: 2021-04-10 20:19:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: b4630f4b266611be06d19bce5f252e9b SHA-1: 40e1635b5b50510a4c5fd608bb9930b24e117c80 SHA-256: 76fafc40375ea94de176d4a4083f413eea16dba3699bd9a4e9699ba34c0d1135
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 0.9996

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 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://baarspo.ru/strik?utm_term=how+to+connect+soundbar+to+vizio+tv PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4448346/normal_5ff5f429e2cce.pdfIn PDF document text
    • http://gebajajax.22web.org/55764554849.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454041/normal_604d2b163579c.pdfIn PDF document text
    • https://cdn.sqhk.co/lelabepena/d9RaUji/paw_patrol_rescue_run_apk_free_download.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460043/normal_5ff7088d42b00.pdfIn PDF document text
    • http://rasezinetoge.iblogger.org/nurivar.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485296/normal_6052ac565f825.pdfIn PDF document text
    • https://cdn.sqhk.co/tabotewo/chD7Ogd/57266535675.pdfIn PDF document text
    • https://cdn.sqhk.co/jurufovowufu/367jf9q/75243566683.pdfIn PDF document text
    • https://cdn.sqhk.co/josurowelimu/jg2nFia/91028048362.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://f1ddcea9-c323-452c-a4d3-aaefec61e50a.filesusr.com/ugd/defd8a_0e55dcccea2f4e109767eeb29cf374bb.pdf?index=trueIn PDF document text
    • https://6f847715-c85a-45d9-ae5c-7c68cc800588.filesusr.com/ugd/6e100b_c35f79421f0d42738fc572ea74c98cca.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/867bb285-b5ad-41c4-958b-0730767a6c17/marketing_strategy_plan_template.pdfIn PDF document text
    • https://a49ec80b-b4e3-4dac-84ed-d687b6aff6a5.filesusr.com/ugd/46d696_dacdddf181f04a61859d83d1b529fd48.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/b66854f9-e8ed-432b-8487-edefd49c455e/9588640707.pdfIn PDF document text
    • http://lenamopotinapar.epizy.com/renaissance_francaise.pdfIn PDF document text
    • http://zobawukesilebaf.epizy.com/sepegajojamurerubup.pdfIn PDF document text
    • http://liroporegabofi.epizy.com/how_to_start_interior_design_course.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/97364578-6505-4365-8aaf-5710ec17efea/dufabovaxuguwofixo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/18a80570-f013-4dd3-9239-2842f9200fd3/wixekexusukanivavizekame.pdfIn PDF document text
    • https://f64a1a0a-debf-4843-a838-a34c0cae0f4a.filesusr.com/ugd/89602e_81cde6cd53b74294b3f4270f0229ccab.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/4f448c6e-9050-4138-8c73-67eda6f5bcce/dujuvivigopasasolosewi.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_off0000eedf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEDF 5204 bytes
SHA-256: 741430b8074696cf375da4be81f7639f26ba4cb869ee0ffbedf82873c0d3c11b
font_01_sfnt_off000100ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100BA 11092 bytes
SHA-256: 9b0e193c4dc78a8c35c8fc66df2fb94ec93d82cb773f7376ee0a2f2c3bfbaf5a

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