Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3c94621ed851498…

MALICIOUS

PDF

72.9 KB Created: 2021-03-01 18:53:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: b5377a28798c084b4f5893011f8eac22 SHA-1: 8d71ea969974be275bbefc5bbccaa0c401ba13c9 SHA-256: d3c94621ed8514988fdf25b3417e7e730e504c9bf343b562b5345c40ad985606
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://golowaki.ru/award?keyword=how+to+draw+christmas+stuff+easy+and+cute PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4487894/normal_5fd9ce5b1d2ea.pdfIn PDF document text
    • https://zigudufojivop.weebly.com/uploads/1/3/4/7/134718002/jetokeji.pdfIn PDF document text
    • https://tenosufude.weebly.com/uploads/1/3/1/4/131455069/171272.pdfIn PDF document text
    • https://juzudibat.weebly.com/uploads/1/3/4/3/134328144/safak_gevov.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414161/normal_5feb6f8940e38.pdfIn PDF document text
    • https://cdn.sqhk.co/lekusovu/ijvpAaR/abba_greatest_hits_vinyl_1976.pdfIn PDF document text
    • http://xariketixagat.mypressonline.com/how_much_does_a_construction_manager_make_in_california.pdfIn PDF document text
    • https://bosaralox.weebly.com/uploads/1/3/4/6/134608385/8616844.pdfIn PDF document text
    • http://bamejudodenor.iblogger.org/formal_letter_writing_topics_cie.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420028/normal_5ff3ee06e7dec.pdfIn PDF document text
    • https://voxipomawo.weebly.com/uploads/1/3/1/3/131379395/gofokenabi.pdfIn PDF document text
    • http://xoziduso.mypressonline.com/27273585117.pdfIn PDF document text
    • http://ronifibofizet.medianewsonline.com/international_journal_of_research_in_marketing_special_issue.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pikaderobiw.atwebpages.com/do_you_capitalize_mother_nature.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_off0000e2b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2B1 5384 bytes
SHA-256: 8dd75d6e369d59ba72b54b438fb923b24496a66b25c68cd380b7eaa6c965a69c
font_01_sfnt_off0000f4eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4EB 9956 bytes
SHA-256: 0a4f1b63b46ca33f8ae294fd69b81b5b4fe5e719495defaba44e9817f39d826b