Malicious PDF — malware analysis report

Static analysis result for SHA-256 c28ad138c396abb7…

MALICIOUS

PDF

59.9 KB Created: 2021-02-12 11:57:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 6b873ee461c5a27c88b87d4f0f8d9605 SHA-1: 3270da8f8cfa7af596cf8e5e5bbfec64995fb434 SHA-256: c28ad138c396abb7d75ea7b342193cf03b834f33bbe10401681064ad2accf44c
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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/aws?utm_term=up+arrow+gif+images+free PDF link annotation
    • https://cdn.sqhk.co/vumulevezuf/eufRgeY/95098082636.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367268/normal_5fe81b5f3dfbd.pdfIn PDF document text
    • https://cdn.sqhk.co/kaxonavi/hdjdLLE/17136099193.pdfIn PDF document text
    • http://onlinesos.tech/37267337509njhw9.pdfIn PDF document text
    • http://hotita.fun/como_puedo_buscar_mi_iphone_desde_androidkxjpl.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479214/normal_600a57a40ed57.pdfIn PDF document text
    • https://cdn.sqhk.co/vafodagusun/hl4ig4Z/one_good_deed_children_s_book.pdfIn PDF document text
    • https://cdn.sqhk.co/lomotutuwe/jimjdqX/maze_medical_abbreviation.pdfIn PDF document text
    • https://cdn.sqhk.co/vibebexez/kifqggL/wolefadaxezinudumudikid.pdfIn PDF document text
    • https://feposejixadolo.weebly.com/uploads/1/3/4/7/134744373/9602457.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413983/normal_6016a8d3b78e3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xaterukojokose.rf.gd/96299045435.pdfIn PDF document text
    • http://sanenuxaxegozez.rf.gd/lagu_yang_terdalam_lirik.pdfIn PDF document text
    • http://gozajogef.rf.gd/nyx_drop_foundation_shade_guide.pdfIn PDF document text
    • http://pamapubosozule.epizy.com/74598570120.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_off0000b183.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB183 5272 bytes
SHA-256: a5c9077666f183d5fa1597b040381acd536dc192c7fdb27201bdd4afc05c7a64
font_01_sfnt_off0000c377.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC377 9276 bytes
SHA-256: 9fb58d6c539b947e7407b6e331378cc5002ef1c6458bfa8974fe20fb35db575c