Malicious PDF — malware analysis report

Static analysis result for SHA-256 de9fd063702d61d4…

MALICIOUS

PDF

72.3 KB Created: 2021-02-18 17:20:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 68c91677f312a256edb937fdb8d62839 SHA-1: d7cf85a23dd769ce2466a6e3bf90bef3712a01cf SHA-256: de9fd063702d61d41e2fdb3b17862f98ba08145fbc6538f0c28e13b711ed4d52
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jacksth.ru/aws?utm_term=how+does+paul+die+in+the+movie+a+river+runs+through+it PDF link annotation
    • https://cdn.sqhk.co/nijusukelok/gjrgeia/95819840318.pdfIn PDF document text
    • https://zuzumesagodufen.weebly.com/uploads/1/3/2/6/132695194/segugulagorekaf-rojere-zasuwaxabon-kedujuvezep.pdfIn PDF document text
    • https://cdn.sqhk.co/retesixabe/hsZ3qif/horizon_credit_union_spokane_phone_number.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401515/normal_60216179a0f9c.pdfIn PDF document text
    • https://cdn.sqhk.co/navimoxa/Eiajfjj/fodademebafuwuzikokituje.pdfIn PDF document text
    • https://cdn.sqhk.co/tosuwukiwate/hg7hbhg/12692450163.pdfIn PDF document text
    • https://lamuwopinu.weebly.com/uploads/1/3/4/6/134632291/b22a9d60a146bdb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454550/normal_600fd90e64858.pdfIn PDF document text
    • https://cdn.sqhk.co/toneribabut/gyjdjdR/simple_to_do_list_free_printable.pdfIn PDF document text
    • https://cdn.sqhk.co/tonuviwa/hCig7hd/sazazijogi.pdfIn PDF document text
    • https://cdn.sqhk.co/vopofuxo/gw0dj9i/40388764357.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382772/normal_60032d7309d3f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379973/normal_601e889ecbd95.pdfIn PDF document text
    • https://cdn.sqhk.co/janawezexoj/5Mhf6ge/48839300673.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xefukogan.rf.gd/patanjali_ayurvedic_medicine_list.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_off0000daf9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAF9 5484 bytes
SHA-256: 06b9b182ce2768ebcf58a69e1cfad1bd9284885915180f91619d287820321ba5
font_01_sfnt_off0000ed8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED8B 11148 bytes
SHA-256: dfeeb0e0d9702e39b1e93663d8f5948391d5a29daee6a2fbb0b1b79209d4c298