Malicious PDF — malware analysis report

Static analysis result for SHA-256 77046c3650b99678…

MALICIOUS

PDF

72.1 KB Created: 2021-02-24 23:18:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: e0be3b7d948805f79bb4859f1bc4c490 SHA-1: 65fc5a715d974c11f76649ba83e2cc5a38f14486 SHA-256: 77046c3650b99678fb3f0c430e204420d6661a16d63625a52386aa92f36fea4c
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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.
  • 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/award?keyword=php+html+file+to+string PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4370737/normal_600d6d2194e26.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450336/normal_5ffbdeb943e1f.pdfIn PDF document text
    • https://cdn.sqhk.co/xopuxuvop/7J9mhhe/ramufagifiner.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450636/normal_601192cb1edb3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416128/normal_6016840a726e1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4479214/normal_5ffb100ce5449.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366028/normal_5fd0c14c13772.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379485/normal_5fdc87d787173.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421939/normal_5fdd862647422.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367275/normal_5fded70fcd333.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/tobaziw/wholesale_bed_sheets_online_india.pdfIn PDF document text
    • https://s3.amazonaws.com/falejogajir/wekegemagavefe.pdfIn PDF document text
    • https://s3.amazonaws.com/najubu/faxurofenigikawodojunulu.pdfIn PDF document text
    • https://s3.amazonaws.com/kozewuposoridil/70125007363.pdfIn PDF document text
    • https://s3.amazonaws.com/vonusirukete/govazusiporib.pdfIn PDF document text
    • https://s3.amazonaws.com/silubebebefuju/85784118546.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_off0000ddd6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDD6 5108 bytes
SHA-256: 2b2cd83403e2907baeac4776409a1f3b947b2868dc7704b02a11cd61f9ac7099
font_01_sfnt_off0000ef19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF19 10568 bytes
SHA-256: 34cfe90588d1bdfb58aad41277acf9b33758a28eee0548bbe4ac4d4531c6acec