Malicious PDF — malware analysis report

Static analysis result for SHA-256 b39c37bee54c9022…

MALICIOUS

PDF

70.4 KB Created: 2021-02-13 23:41:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 8cd34a19095086489a1cc1bd2f095b2c SHA-1: feb3c227359c1f88f1eace4ea3a02d89151c5b15 SHA-256: b39c37bee54c9022be981f6eda613e9c81491a3234fba0ab7a5f02426f4f7974
204 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 7

  • 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 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.
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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=wt+grant+stores PDF link annotation
    • http://healthytrands.com/33933095653pmsqo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368245/normal_60057d2199e6d.pdfIn PDF document text
    • http://lovelyhouse.online/729882206120c1g3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450513/normal_5fddfe9e8d922.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4406168/normal_5ff0ee33dd310.pdfIn PDF document text
    • https://vetitigozep.weebly.com/uploads/1/3/1/4/131437709/gawoxu.pdfIn PDF document text
    • http://13millions-warzone.store/12th_botany_practical_manual3bexn.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416806/normal_5ff115a9bc460.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408463/normal_5fe84377241d5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369146/normal_600654fa40d10.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490125/normal_5ffdb7eaa880e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4479902/normal_5ff4d3a4771e0.pdfIn PDF document text
    • http://prostosite.site/208524498823b1a7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449992/normal_60197b83904e8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000d928.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD928 4836 bytes
SHA-256: ca90fe86ffdbdd65ed73723da382107f99372f5c18d01b506e74f588c9750fc7
font_01_sfnt_off0000e9b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9B6 10456 bytes
SHA-256: 9ba1f61ebad23e4e2ca5b8dee580c09ec6995dcc579b1e79f0029823fde6e090

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