Malicious PDF — malware analysis report

Static analysis result for SHA-256 c831d52221aac14d…

MALICIOUS

PDF

68.1 KB Created: 2021-02-11 14:30:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 883005e79e3b838c23301a7a42ed73f4 SHA-1: de25e70e0acf2e5f494f281e721f709e339a1235 SHA-256: c831d52221aac14d2265d6f79e456a9cfdd29ab5e8d2275f067dcfcb59322313
186 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.
  • 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://bologen.ru/wix?keyword=make+analog+synthesizers+pdf PDF link annotation
    • https://cdn.sqhk.co/mofijovelu/pjhjave/42653493167.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448357/normal_5fe075b866d40.pdfIn PDF document text
    • https://cdn.sqhk.co/mojupesonon/hfjcjgQ/poner_saldo_a_mi_at_t.pdfIn PDF document text
    • https://cdn.sqhk.co/motuvitewodi/jcidLib/79504521090.pdfIn PDF document text
    • http://sokfresh.fun/ps4_pro_rebuild_database_time9d1g4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407314/normal_5fe489f0b959b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391305/normal_5fea1f23774df.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367296/normal_5fe302e956da9.pdfIn PDF document text
    • https://lomewulepizava.weebly.com/uploads/1/3/3/9/133999744/bevulu.pdfIn PDF document text
    • http://vigastlens.xyz/zedge_free_ringtones_for_iphone_xc29td.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369654/normal_6008b2a956f4a.pdfIn PDF document text
    • https://komomofuxuz.weebly.com/uploads/1/3/4/4/134494735/ligex.pdfIn PDF document text
    • https://wilibupa.weebly.com/uploads/1/3/2/6/132681560/temopizijiri.pdfIn PDF document text
    • https://cdn.sqhk.co/gobuwovuv/U3hikij/pebinigobubataze.pdfIn PDF document text
    • https://vewirorerisemi.weebly.com/uploads/1/3/4/6/134627211/90d8e6e5c2159.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bfbb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBFBB 5312 bytes
SHA-256: 4d9fb5d26f28c07015623c5ffeaff9023d526976959700d9c4147eefa7ca3465
font_01_sfnt_off0000d1db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1DB 10460 bytes
SHA-256: f9ec04bc4fbb16ce7e9bab692dc6666d4ba47d3cc164dd2fe846e05a587319de
font_02_sfnt_off0000f5b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5B9 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f