Malicious PDF / .VIR — malware analysis report

Static analysis result for SHA-256 f37ca35f19e4d8fc…

MALICIOUS

PDF / .VIR

284.6 KB Created: 2023-10-17 18:43:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2024-05-27
MD5: 90ae4326cfa318508812cfbbd7f75993 SHA-1: d73e0dce0e17957c8094aa9ff141d217c157641b SHA-256: f37ca35f19e4d8fcf09a6764a568102dbd899f557fe4aad7a26fc54a0d82d65a
194 Risk Score

Machine Learning

  • Nyx PDF Classifier clean score 0.1984

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://wanejavozu.gluvoob.com/9714424374365719230688?zoxiratitijerikabulogulidoma=ganewavewomiposonatekotirededekedugulazisixiwimamokawodupezoxejatuxeruzusotutusidovajovemofilugebiperikaroxuposizudulubejabigasoduwilulanekoxutovijilukalexitetavifuwegesutuwejuropulewafuvanewezurazulikudizu&utm_term=weekly+action+plan+template+pdf&kowegininejizufajolowomalavarenilatonivilomuk=sopojigurezafejakemunepizejimidafoduwovomuzifajigofevajifopabegamusiwugomesoleviliwamabozubipaxijasafoveliwiweximonebobug PDF link annotation
    • https://wanejavozu.gluvoob.com/9714424374365719230688?zoxiratitijerikabulogulidoma=ganewavewomiposonatekotirededekedugulazisixiwimamokawodupezoxejatuxeruzusotutusidovajovemofilugebiperikaroxuposizudulubejabigasoduwilulanekoxutovijilukalexitetavifuwegesutuwejuropulewafuvanewezurazulikudizu&utm_term=wPDF link annotation
    • https://img1.wsimg.com/blobby/go/0a2e88a7-385b-4aed-a81e-123c037cba5d/downloads/british_council_for_ielts_coaching.pdfIn PDF document text
    • https://uploads-ssl.webflow.com/64f1a92802940058e3b7fae6/6527f24618936cd8546a4781_visibuxunigasavitiburowi.pdfIn PDF document text
    • https://uploads-ssl.webflow.com/64ee19fc1049f08f42555926/6527f23645ee639edd6bef76_xoketikupunusaji.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_off00042051.bin)
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn extracted file (font_00_sfnt_off00042051.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00042051.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x42051 16548 bytes
SHA-256: 26131921591b891b0cf8a7e93d071246c4bc65f19b269cf1727a8f714b7d37e4
font_01_sfnt_off00044ac7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x44AC7 11204 bytes
SHA-256: 0a9229bf250e07a25d430ae0c818962e47b94146120508bf18f14690c61d1550