Malicious PDF — malware analysis report

Static analysis result for SHA-256 eafeb024724bc36b…

MALICIOUS

PDF

123.0 KB Created: 2021-05-11 01:32:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 7b980218390d4cf1f338f9ea5c4a05dc SHA-1: a25bd32db2dce3a8fe3f52f02abd33ff8561a3f4 SHA-256: eafeb024724bc36bc6ba36a5cd7526fce4ebb003167e17b84ad3879d179dee52
194 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains a link disguised as a 'Mercruiser 4.3 l wiring diagram' that redirects to a malicious URL. This URL is flagged as a redirector to known malicious infrastructure, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly support its malicious nature, likely exploiting PDF vulnerabilities to execute a payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://dafemum.ru/strik?utm_term=mercruiser+4.3+l+wiring+diagram In PDF document text
    • http://jebifawulu.mywebcommunity.org/mastering_business_intelligence_with_microstrategy_free_download.pdfIn PDF document text
    • http://vowufijetapiko.sportsontheweb.net/65987904474.pdfIn PDF document text
    • http://sdek-24.cc/xerigogilirumuduedu8a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409092/normal_5fec4d0b3fb49.pdfIn PDF document text
    • https://gosasolana.weebly.com/uploads/1/3/4/5/134523876/fawazito.pdfIn PDF document text
    • http://sarkife.site/zepotevojosogexusezopimab6fi6u.pdfIn PDF document text
    • https://bibomezu.weebly.com/uploads/1/3/2/7/132710601/datawarosudavizade.pdfIn PDF document text
    • http://rejorevubirobu.sportsontheweb.net/bhairavi_vandana.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401732/normal_6034533cbf8f7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gakamaxoluzes.atwebpages.com/the_umbrella_academy_comic_espaol_descargar_gratis.pdfIn PDF document text
    • http://nononulavojiki.myartsonline.com/hamilton_beach_food_steamer_review.pdfIn PDF document text
    • https://s3.amazonaws.com/vetamedisoz/69375129162.pdfIn PDF document text
    • https://s3.amazonaws.com/jinotugiwomo/vawugafoxufawularomuror.pdfIn PDF document text
    • http://raneluwet.rf.gd/solicitud_de_inscripcion_de_auxiliares_de_comercio.pdfIn PDF document text
    • http://zoguberuwanu.rf.gd/5684491724.pdfIn PDF document text
    • https://s3.amazonaws.com/rozebofukixus/dagavanatonuj.pdfIn PDF document text
    • https://s3.amazonaws.com/fuwuzerijofa/tepezesazomu.pdfIn PDF document text
    • http://gawexerexi.rf.gd/wadav.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_off0001a33b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A33B 5640 bytes
SHA-256: 2b0034b34f5a036b379a8e0238d1907a55cce0b426a32a189c8f69a7d799b6a9
font_01_sfnt_off0001b688.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B688 11872 bytes
SHA-256: 6edcb3c7905cfe92536c5775438d65a142312881cfa89e1feff51aeb37ca3a73

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