Malicious PDF — malware analysis report

Static analysis result for SHA-256 863a869d4ba81985…

MALICIOUS

PDF

72.3 KB Created: 2021-02-15 14:42:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 368951dfc767201b61564068df449129 SHA-1: 5ca4f945dc42a1c64728a77c7aa8da980e60910e SHA-256: 863a869d4ba81985588fe712b9527d31cb6267aa0e4d33f19b3c31babe0b5e24
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=sharp+microwave+oven+ratings PDF link annotation
    • https://rotaxavevun.weebly.com/uploads/1/3/4/8/134884867/f0f9175.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371004/normal_5fe461e4e716f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480182/normal_5ffdd51b01a6f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403959/normal_5fe694592f7cb.pdfIn PDF document text
    • https://cdn.sqhk.co/wixexozesila/54hz7R4/53663143439.pdfIn PDF document text
    • https://cdn.sqhk.co/forokuxodel/dgdR4ha/onedrive_download_size_limit.pdfIn PDF document text
    • https://xuzubakew.weebly.com/uploads/1/3/0/9/130969304/9f0f10b.pdfIn PDF document text
    • https://bulodogezuso.weebly.com/uploads/1/3/4/8/134868115/6c7a95fe2.pdfIn PDF document text
    • https://cdn.sqhk.co/manigonodapu/chaigA3/note_taking_app_android_2020.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446272/normal_5ff62e6f05003.pdfIn PDF document text
    • http://regsenatvumen.website/ajax_form_field_validation_phpvut9j.pdfIn PDF document text
    • https://damujulul.weebly.com/uploads/1/3/5/3/135335913/kidajuxep-gusot-kafobeni-sifuxunokeb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375708/normal_5fe05863db921.pdfIn PDF document text
    • https://cdn.sqhk.co/senaveduwiz/gcgjugd/papa_s_freezeria_unblocked_games_6969.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4401692/normal_5ff7856aa393f.pdfIn PDF document text
    • http://new-leggins.site/85617492058hvha.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392658/normal_60246bb1a2548.pdfIn PDF document text
    • https://cdn.sqhk.co/rigizisojix/eLo4bVu/bovetefigofosasadip.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_off0000dbca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBCA 5572 bytes
SHA-256: e646caf7cbf4367827f338241aa74f29e91ab0f08a66724637a52ae0ff761e34
font_01_sfnt_off0000eea8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEA8 11140 bytes
SHA-256: e221427293a8e51e60c4c401a229bded3dc92498ca765b416eb8dd4fba41b520