Malicious PDF — malware analysis report

Static analysis result for SHA-256 73fd44cc4c863903…

MALICIOUS

PDF

65.2 KB Created: 2020-11-18 22:44:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 8e6392b40a7d8832d0bad2089798a9cf SHA-1: 4b109bfb92ac079b0ec8739b2e7d84e5d8fa4c04 SHA-256: 73fd44cc4c863903026d7043e0b64e780e1f3bd8f65b46347bea3cfd2bfb209c
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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://traffset.ru/123?utm_term=gigantes+del+cibao+en+vivo PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4403127/normal_5fa03d4243509.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366374/normal_5f87418819f0b.pdfIn PDF document text
    • https://manabaxijex.weebly.com/uploads/1/3/4/6/134626004/39a3e01cbe76b.pdfIn PDF document text
    • https://bogadisosupotaj.weebly.com/uploads/1/3/0/7/130776541/5226296.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366407/normal_5f98e0301bc3e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391331/normal_5f9056ad6398f.pdfIn PDF document text
    • https://visoruze.weebly.com/uploads/1/3/4/1/134109001/809641.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/magapeguwabe/number_line_0-_20.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb6d5d1e-cbd3-4fa6-91c5-2f29a8482a17/34425100450.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/52faf1ca-8977-4a32-823e-d0001c9db1eb/83670649683.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0a95d661-c53d-46b6-b14b-af0fc297e8dd/20767856237.pdfIn PDF document text
    • https://s3.amazonaws.com/xovekolamoxe/what_did_android_17_wish_for.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e403f5d-974a-40d6-a6dc-a3f1c5044856/fakegonepivofopumagek.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3193d350-3486-4670-9ef8-b71b8d32e05e/watch_madea_goes_to_jail_play_2006.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_off0000bf14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF14 5244 bytes
SHA-256: 7512f50a43315f3bf9185d207810f54355412e9b36a7ade85c4993e52404b0a6
font_01_sfnt_off0000d103.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD103 11808 bytes
SHA-256: 71e39e7f79780409efbdf8416cb7b29149a961f2e4a372063a8e4027eee37914

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