Malicious PDF — malware analysis report

Static analysis result for SHA-256 8591ae5ad3d6c9cd…

MALICIOUS

PDF

66.1 KB Created: 2021-03-04 11:43:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 70c12d014c65d09595f4080734059b6f SHA-1: ebff188a03076d9ce67b20ade160b9f7b9ae1984 SHA-256: 8591ae5ad3d6c9cd9758fbcb7d5c4d9744341eee6f30c55b391a34a8199997b8
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://resalured.ru/award?keyword=surah+yaseen+full+hd+pic PDF link annotation
    • https://moxuvobojivoz.weebly.com/uploads/1/3/0/8/130873852/bijizujumonumomezo.pdfIn PDF document text
    • http://lnstagramservicecopyrights.com/lutokilepubood4ys.pdfIn PDF document text
    • http://bachanalytics.com/24168752673aj4aa.pdfIn PDF document text
    • https://binigikuvoloxog.weebly.com/uploads/1/3/5/3/135332024/a9325bf7063f.pdfIn PDF document text
    • http://kanshoper.site/56846568160m6nxh.pdfIn PDF document text
    • http://aduo5.online/rosobemijunokaa9gpp.pdfIn PDF document text
    • http://tiktokhd.design/hoja_de_balance_de_comprobacionpb742.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://nisetekotixob.myartsonline.com/danotuwaneparodizifigufez.pdfIn PDF document text
    • http://nowimirozox.atwebpages.com/imprimir_para_nios_tablas_de_multiplicar_del_1_al_12.pdfIn PDF document text
    • https://s3.amazonaws.com/lezopobigeza/5097960442.pdfIn PDF document text
    • https://s3.amazonaws.com/niwotipugonuvoz/goraji.pdfIn PDF document text
    • https://s3.amazonaws.com/penale/border_songs_ming.pdfIn PDF document text
    • https://s3.amazonaws.com/wovedukevikov/40773064205.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ba6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA6C 5140 bytes
SHA-256: 908d07df3cd22b1c1325e0d6d9a438dc177ca9887f5f3dd70755b014737563ff
font_01_sfnt_off0000cbd9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBD9 10036 bytes
SHA-256: 41dd63c5198652f14ffc8ef4161354635a9a12aeabfcbfa8046bf235a8e5422f
font_02_sfnt_off0000edc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDC7 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176