Malicious PDF / .VIR — malware analysis report

Static analysis result for SHA-256 91251b7c3d686f92…

MALICIOUS

PDF / .VIR

75.7 KB Created: 2023-10-28 11:19:41 +03:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 5.15.10) First seen: 2024-06-13
MD5: f523a1ad62fe3db1bbb5557d3066ce42 SHA-1: 3b22c8462e15cbf8da5f69e91139f294a5de49f0 SHA-256: 91251b7c3d686f92ce72f83aecd3f9081f655046c8f8bdbca097902a5f36da17
194 Risk Score

Machine Learning

  • Nyx PDF Classifier clean score 0.2193

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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.
  • Clickable PDF combines external action with parser-evasion structure high PDF_ACTION_PARSER_EVASION
    PDF has an external clickable URI together with object graph or xref structures that make parsers disagree, such as divergent duplicate objects, parser divergence, or xref offset mismatch. That combination is stronger than a plain link: the document is both an outward-action carrier and a parser-confusion/evasion sample.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://wopidetazonazaw.oapsirs.com/327702490747568940?zuzuxadikuxevuzuragopovimepegemidalanazujusazavuvisovepironuwukipatavupiporowagov=lumuworikofolegudipevibaroxipozugofixesatukelipafuwavekidajipirasetaninopavonevipilabopunuguvifiperapirekigukikikutixoreruwabufeguxuputavokevefodunowonasunewexalojurivipunedutunuwubejulazinisalobulepanuwub&keyword=dstv+channel+225+tv+guide&japufojisukuloravaxojobotilutotesifusiduwerexokiwufifow=fozakagubewenotewusajenifixawidaxewoxawiwedurevimutanenanajesopemovexamotedulukozukajevobawopexofujunobivetolefirifubuzu In PDF document text
    • https://wopidetazonazaw.oapsirs.com/327702490747568940?zuzuxadikuxevuzuragopovimepegemidalanazujusazavuvisovepironuwukipatavupiporowagov=lumuworikofolegudipevibaroxipozugofixesatukelipafuwavekidajipirasetaninopavonevipilabopunuguvifiperapirekigukikikutixoreruwabufeguxuputavokevefodunowonasunewexalojPDF link annotation
    • https://wopidetazonazaw.oapsirs.com/327702490747568940?zuzuxadikuxevuzuragopovimepegemidalanazujusazavuvisovepironuwukipatavupiporowagov=lumuworikofolegudipevibaroxipozugofixesatukelipafuwavekidajipirasetaninopavonevipilabopunuguvifiperapirekigukikikutixoreruwabufeguxuputavokevefodunowonasunewexalojurivipunedutunuwubejulazinisalobulepanuwub&keyword=dstv+channel+225+tv+guide&japufojisukuloravaxojobotilutotesifusiduwerexokiwufifow=fozakagubewenotewusajenifixawidaxewoxawiwedurevimutanenanajesopemovPDF link annotation
    • https://img1.wsimg.com/blobby/go/e8f5ff17-08ce-4867-bc3b-13297d6f8ac2/downloads/sonabudozabenepisikejojo.pdfIn PDF document text
    • https://uploads-ssl.webflow.com/64ee0414556e591a8ce4196e/653667378935884ad52e8c57_75182123148.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://dejavu.sourceforge.netIn extracted file (font_00_sfnt_off0000e06a.bin)
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn extracted file (font_00_sfnt_off0000e06a.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e06a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE06A 15672 bytes
SHA-256: fad7b23245180fcbd4cad696cd8bcc75fce5768cb3e1722a612ea45c06488886
font_01_sfnt_off000108bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108BF 11436 bytes
SHA-256: 5e4ac9bef94bd2d91f2dc2d62b5d3f4ad947e1e17c68aa7748b79a2cd58f74a5