Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a88b26d84cf9cd5…

MALICIOUS

PDF

73.0 KB Created: 2021-02-19 13:35:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 5e3987b5e4e4c88635219233f42ec709 SHA-1: 5fb348136248e58fe5e178ed211a12c1d2f6a0c8 SHA-256: 6a88b26d84cf9cd53af369e7f7156dc4ee052b78a5419ff8540aeaebf36d8d48
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • 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/aws?utm_term=what+do+the+leaf+symbolize In PDF document text
    • https://static.s123-cdn-static.com/uploads/4495841/normal_5fed9b0a34061.pdfIn PDF document text
    • http://reduslimitaly.website/81723905650i39tb.pdfIn PDF document text
    • http://levantemosaic.com/factory_reset_android_tablet_forgot_password7twf8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388612/normal_5fc6f3bfb1cd7.pdfIn PDF document text
    • http://freshnatur.fun/fureje5dvw.pdfIn PDF document text
    • http://viwimewi.22web.org/naqaab_bengali_movie_filmywap.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412900/normal_5fffc1116c11e.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/wemupajese/adelaide_oval_parking_information.pdfIn PDF document text
    • http://banamuf.rf.gd/fiximala.pdfIn PDF document text
    • http://nonogopikizezed.rf.gd/pasipekijejedagisapi.pdfIn PDF document text
    • https://s3.amazonaws.com/somisilegex/power_outage_report_houston.pdfIn PDF document text
    • http://zefixufedinokas.epizy.com/asus_zenfone_3_laser_mobile_information.pdfIn PDF document text
    • http://gesesasogibigaw.rf.gd/tuvugu.pdfIn PDF document text
    • https://s3.amazonaws.com/bejenosugede/dross_crossword_answer.pdfIn PDF document text
    • https://s3.amazonaws.com/vifusupegiza/81546399430.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_off0000e187.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE187 5356 bytes
SHA-256: 5f0dfa1445756f2abebe7faf6d3f6eb5d46486fcbca7f9100edaeb8edca465a8
font_01_sfnt_off0000f3b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3B6 10388 bytes
SHA-256: 45fce222aaaae34b82d46afbf1cc6112229a101409a518104d0793efe55009a1