Malicious PDF — malware analysis report

Static analysis result for SHA-256 1481788abd2a893a…

MALICIOUS

PDF

70.0 KB Created: 2021-02-03 13:02:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 3204a596c7018110a95874980a7c1b28 SHA-1: 43b42fe22055b900849548949700f67744b0f1e6 SHA-256: 1481788abd2a893a9734bc578fc88f9ead5944b164426d4ef8fad5261a6610a2
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://seumenha.ru/123?utm_term=social+security+building+kapolei PDF link annotation
    • http://prequester.online/ielts_general_writing_task_1_structureqptjz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402533/normal_5ff1217b16a09.pdfIn PDF document text
    • https://cdn.sqhk.co/girewobo/WTiOA1D/vitamin_c_supplements_for_skin.pdfIn PDF document text
    • https://wugoxuvalego.weebly.com/uploads/1/3/4/0/134017666/dosibimetiremum.pdfIn PDF document text
    • http://malespw.xyz/blossoms_of_the_savannah_study_guidewxjbq.pdfIn PDF document text
    • https://vebavorosufate.weebly.com/uploads/1/3/4/7/134742301/5101772.pdfIn PDF document text
    • http://stixlife.info/bazake0b568.pdfIn PDF document text
    • https://cdn.sqhk.co/piwizogir/jcifgin/40453810174.pdfIn PDF document text
    • http://myluckywin.site/673481538537zvyk.pdfIn PDF document text
    • https://cdn.sqhk.co/polopomoset/hb9Khan/calgary_stampede_chuckwagon_race_wreck.pdfIn PDF document text
    • https://cdn.sqhk.co/patagarinixa/jlBlwM8/puvoxowanotivuborimefu.pdfIn PDF document text
    • http://silvanozito.online/54841241405ybfk6.pdfIn PDF document text
    • https://cdn.sqhk.co/noxibogalu/y621hcd/78645003191.pdfIn PDF document text
    • https://cdn.sqhk.co/ruzudulo/GhaeVVh/kaxadotigab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450434/normal_6016df897fb56.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_off0000d455.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD455 5648 bytes
SHA-256: 31c1bca7913a1fc7c1fa276aef32dd4c472efef5f954119c966da47c51bbb347
font_01_sfnt_off0000e79d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE79D 10568 bytes
SHA-256: f6d0b446460b403728ca71261b3fe615e7691702e8cb9b7925fcd050b3296114