Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e5bc4832970a3ca…

MALICIOUS

PDF

89.0 KB Created: 2021-02-15 13:43:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 188e481c8cdbc6bc03abf1df339fe284 SHA-1: ad3893f97167a3cf4391afd8bceb2120e66a5b2e SHA-256: 6e5bc4832970a3cadf057a1786c7a7449a78032010b549697ea601afd2290883
254 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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/wb?keyword=shmoop%20song%20of%20solomon%20chapter%2014 In PDF document text
    • http://kenanimit.iblogger.org/2036965933.pdfIn PDF document text
    • http://chelamela.org/bandori_events_guidedxjnh.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454054/normal_6002e6557c07a.pdfIn PDF document text
    • http://fastpysystem.online/lenguaje_corporal_gestos_y_su_significadoxsdeh.pdfIn PDF document text
    • https://dawemewi.weebly.com/uploads/1/3/4/7/134747996/6209004.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485580/normal_5fd8c19821125.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496826/normal_600fd48cdb792.pdfIn PDF document text
    • http://pedufan.iblogger.org/install_google_authenticator_app_for_android.pdfIn PDF document text
    • http://gouliwer.online/crash_course_economics_worksheets_answersjelqo.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/gidibesuxi/yummy_mummies_tv_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/xakusineba/49610063332.pdfIn PDF document text
    • https://s3.amazonaws.com/wupagivoz/ewg_guides_cleaners.pdfIn PDF document text
    • http://xuraxanab.epizy.com/lokijikimado.pdfIn PDF document text
    • https://s3.amazonaws.com/vidadaviwal/fasafef.pdfIn PDF document text
    • http://pewijaxenutudum.rf.gd/alone_wallpaper_images.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_off00011b87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B87 5672 bytes
SHA-256: a3f52578e200f3dbc2a24d0cfd98acab30227769d6449e2226df3fa61b37ab52
font_01_sfnt_off00012eb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EB3 11692 bytes
SHA-256: 0d91128354da70b9a4ddd9e90ddd7de1df4a80ff2eec27413e8c5d4314cd2ed4