Malicious PDF — malware analysis report

Static analysis result for SHA-256 dfe5a78170c560d1…

MALICIOUS

PDF

75.7 KB Created: 2021-03-08 22:50:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: c0e62367002cd3b75831947b0df5b718 SHA-1: 5375fee164fe89588558d0b859eb6d7deded60a8 SHA-256: dfe5a78170c560d1ee1f29b403e829ad3efb643ee8ad991a8a4bae7a68100a24
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains and link farms, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious documents designed to redirect users to malicious sites, likely for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://maypoin.ru/wix?keyword=armitron+wr330+set+time+instructions PDF link annotation
    • https://xinofebew.weebly.com/uploads/1/3/5/3/135305957/gasabo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366625/normal_5fcdc3454460d.pdfIn PDF document text
    • https://nopovufarake.weebly.com/uploads/1/3/1/3/131379277/5373203.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454808/normal_601ffc996c95b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4504791/normal_601a1a0fb0301.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368976/normal_5fe0f07e50242.pdfIn PDF document text
    • https://vesanawe.weebly.com/uploads/1/3/4/6/134602832/3054685.pdfIn PDF document text
    • http://junujagar.iblogger.org/noluvavubagunawatawile.pdfIn PDF document text
    • https://toruganaduloxo.weebly.com/uploads/1/3/5/3/135347606/tibokisiv.pdfIn PDF document text
    • https://dugigoje.weebly.com/uploads/1/3/4/7/134754128/lutewarixu-lilovatogopuvuw-jomefale-zulujovatifivum.pdfIn PDF document text
    • https://puzomukasudugun.weebly.com/uploads/1/3/4/8/134865935/ad7a57782.pdfIn PDF document text
    • https://gekonoxare.weebly.com/uploads/1/3/4/4/134480638/4748954.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377388/normal_5fc676dd3c876.pdfIn PDF document text
    • http://bijakolonan.iblogger.org/baby_dance_video_tamil.pdfIn PDF document text
    • https://xuxomesepek.weebly.com/uploads/1/3/4/6/134681539/f758b77.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/wobuzisibal/cottage_ownership_guide.pdfIn PDF document text
    • http://zakuvusebaj.epizy.com/wovupofofir.pdfIn PDF document text
    • http://zupitatip.atwebpages.com/jusalerexapa.pdfIn PDF document text
    • http://muvekalufisu.atwebpages.com/1213651734.pdfIn PDF document text
    • https://s3.amazonaws.com/zowibatev/95772157845.pdfIn PDF document text
    • https://s3.amazonaws.com/pevarijidasalop/wodozomo.pdfIn PDF document text
    • https://s3.amazonaws.com/bisapovepizaj/tumavuzoxoribugofiz.pdfIn PDF document text
    • https://s3.amazonaws.com/veraxawewib/momovolaxuxujibar.pdfIn PDF document text
    • http://kababotatage.epizy.com/toledenuxivexarik.pdfIn PDF document text
    • http://xuguriganuzako.epizy.com/84650471945.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_off0000eb21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB21 5088 bytes
SHA-256: 1dbcd2a38c6d795ed623001e646cc6b39f61883a6035fe8e6d13154d2cfab9bd
font_01_sfnt_off0000fc73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC73 10740 bytes
SHA-256: 9f81ba858e4c760022cf7313ff45e7fab37face2be55bc249a33ba4acd2820bb

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