Malicious PDF — malware analysis report

Static analysis result for SHA-256 99122c026455ed37…

MALICIOUS

PDF

73.7 KB Created: 2021-02-27 06:30:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-01
MD5: 0f6cbf3c1bc0cb28a753e1ab259f6f2d SHA-1: 9baa5ba6d40fd551bdf7065bc7a933603f6cda02 SHA-256: 99122c026455ed373628ed1ad6db834a7c3c27b0afcfb0c9b12e1e4512916a20
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://jottigo.ru/award?keyword=how+to+value+a+broker%2527s+book+of+business PDF link annotation
    • https://rudofodirofebas.weebly.com/uploads/1/3/0/7/130739781/fc8cf.pdfIn PDF document text
    • http://mebelintera.ru/young_life_campaigners_weekendw0u7g.pdfIn PDF document text
    • http://idealica-ufficiale.site/winnie_the_pooh_vintage_book_set6cpbq.pdfIn PDF document text
    • http://bcpreactiva-enlinea.com/why_is_my_printer_not_responding_canondb3ev.pdfIn PDF document text
    • http://zakomuxoza.getenjoyment.net/what_does_availeth_mean_in_spanish.pdfIn PDF document text
    • http://reduslim-official.website/puremif8a76a.pdfIn PDF document text
    • http://hrushch.space/51922018949wdrc1.pdfIn PDF document text
    • http://detonicinitalia.website/80026646945z7wf0.pdfIn PDF document text
    • http://com-connexion.xyz/72530759724j5yvc.pdfIn PDF document text
    • http://copyrighthelpptteam.com/tabeno8t07g.pdfIn PDF document text
    • http://shtangennstutkupitseychas.xyz/vigevuzer1b7up.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/tudawufed/terawifezamodun.pdfIn PDF document text
    • https://s3.amazonaws.com/tevigotu/avengers_theme_song_tuba_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/gasodamuza/verirawoxuji.pdfIn PDF document text
    • https://s3.amazonaws.com/risalenefazozo/44359750492.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_off0000e4a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4A6 5112 bytes
SHA-256: fbc4478b55048612671edc50c4643728989f5e56f4559e1ea581db65c7228e02
font_01_sfnt_off0000f634.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF634 10368 bytes
SHA-256: bd9ce168dc1251c186a86089ce6b1b4c73b6ce81855dd415ef020c2e551f1ebe