Malicious PDF — malware analysis report

Static analysis result for SHA-256 87b56068d31c939e…

MALICIOUS

PDF

76.2 KB Created: 2021-02-15 14:45:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 3f9eb3ae1507ec1279b52422c1dfd717 SHA-1: 5779fe4afc29845b70c0bc54f4433f7b71c9d116 SHA-256: 87b56068d31c939e934d2da830979bc08d108c5c07c474e562408df7a85579b2
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://leonvi.ru/strik?utm_term=old+snapper+riding+mowers+for+sale+near+me PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4454182/normal_602742afc8872.pdfIn PDF document text
    • http://toolsbestpricemicrometer.site/miluf0f8ju.pdfIn PDF document text
    • http://medyahanem.com/cot_bed_mattress_sheetij05h.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4529087/normal_601ef6872d6ab.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417830/normal_5ff405c62d66f.pdfIn PDF document text
    • https://panikelixiguju.weebly.com/uploads/1/3/4/4/134478359/1041076.pdfIn PDF document text
    • http://momentikshop.space/effortless_mastery_audiobookla79l.pdfIn PDF document text
    • http://bloomwithdeanna.com/879249534927u8dr.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421783/normal_5ff4bf80bded1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376852/normal_5fe16b5aba44e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387219/normal_5ffd48673a073.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413701/normal_5fe3b23a508f1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451350/normal_5fd88664c179d.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/xesigeze/50192606376.pdfIn PDF document text
    • https://s3.amazonaws.com/duzexefemosaxe/doretufuvijikurazuneko.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_off0000ed8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED8D 5480 bytes
SHA-256: 627b30e35e3d7a6359725ec4a9b91cf9a6f15dcd2b45baca1d09329515acb898
font_01_sfnt_off0001002e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1002E 10376 bytes
SHA-256: e3633a507e37c4a68a5fafdb1ab794b0c65458090df64730801852f19c86de32