Malicious PDF — malware analysis report

Static analysis result for SHA-256 665c81db7fdce88b…

MALICIOUS

PDF

68.2 KB Created: 2021-02-15 11:30:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 895d13e816e96c8fd012115abd1ca644 SHA-1: 286de14de943b9fb9d3e93a5609327a0b4103a13 SHA-256: 665c81db7fdce88b5910192e500987c415656994e89ed71581e1e7175844f92e
196 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.
  • 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://baarspo.ru/wb?keyword=chatal%20band%20music%20download%20mp3%20naa%20songs PDF link annotation
    • https://cdn.sqhk.co/ganuniwiku/gKihl8h/xawuwe.pdfIn PDF document text
    • https://cdn.sqhk.co/navotezive/s6jekST/mine_survival_mod_menu_2._1._8.pdfIn PDF document text
    • http://whysmall.space/bootstrap_carousel_multiple_items_responsive_freee2hlt.pdfIn PDF document text
    • http://gladkoe-telo.xyz/z_nation_wiki_cassandra4saq8.pdfIn PDF document text
    • https://nesibebinirudeb.weebly.com/uploads/1/3/5/3/135311353/8304335.pdfIn PDF document text
    • https://suzexefovewav.weebly.com/uploads/1/3/4/6/134640410/beposutavetosiwog.pdfIn PDF document text
    • https://cdn.sqhk.co/zovaratigu/ZeNhbr1/pesovokukefimiwavaberezo.pdfIn PDF document text
    • https://cdn.sqhk.co/fukonovum/jLLij7r/srso4_state_of_matter.pdfIn PDF document text
    • http://dreabling.online/ejercicios_de_numeros_cuanticos_resueltoszi632.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/zoluwivebiro/wemudeme.pdfIn PDF document text
    • https://s3.amazonaws.com/zemunomipazikez/9545541961.pdfIn PDF document text
    • https://s3.amazonaws.com/kisagoz/scientific_notation_math_practice_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/wupiwupiwot/75305831580.pdfIn PDF document text
    • https://s3.amazonaws.com/sabobenuwe/pizuroludori.pdfIn PDF document text
    • https://s3.amazonaws.com/wurivuve/determining_optimal_capital_structure.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_off0000cdaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDAA 5692 bytes
SHA-256: 16a4aef0666e2217cabd2c84f9873d7c13bc34002c95c993d05b6f719656d7d3
font_01_sfnt_off0000e0e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0E6 10324 bytes
SHA-256: 22d882b74f55b6afcb1bab65cd2e519cb8d15f2a760a3ad9f91e29c084cff79a