Malicious PDF — malware analysis report

Static analysis result for SHA-256 7874e5fef0274b60…

MALICIOUS

PDF

67.9 KB Created: 2021-02-26 08:16:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: a16d55a9d5921d4122028cf8f1eb066c SHA-1: 14be0bd76f65b14e2221ae2ca74a5df6362d1092 SHA-256: 7874e5fef0274b60792ebe094f2284395f65d16500638a31ae1e4cb3d22f6366
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/wix?keyword=arborist+certification+study+guide+ebook In PDF document text
    • http://wepirafigezatid.22web.org/blockman_multiplayer_for_minecraft_pe_apk.pdfIn PDF document text
    • https://kejobogufepemis.weebly.com/uploads/1/3/0/7/130775396/jorixajo.pdfIn PDF document text
    • https://cdn.sqhk.co/pesasotiro/igjcjgn/musicals_movies_list.pdfIn PDF document text
    • https://dunelakanova.weebly.com/uploads/1/3/1/4/131410870/8020446.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459640/normal_5fcf622aaecaf.pdfIn PDF document text
    • https://cdn.sqhk.co/totafeta/cigQnie/31577156095.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379231/normal_5ff5cd53dd798.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4466661/normal_5fcf67953e2ac.pdfIn PDF document text
    • http://zonizubiro.getenjoyment.net/61231944387.pdfIn PDF document text
    • https://nukubutanedun.weebly.com/uploads/1/3/5/3/135309192/a332762bc0.pdfIn PDF document text
    • https://cdn.sqhk.co/xawobovuji/m5dPNgd/kezopu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459170/normal_6002b82a180ad.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485450/normal_5ff85b40e1fe7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366040/normal_601bb06f040ab.pdfIn PDF document text
    • https://cdn.sqhk.co/pasededi/gc87cig/94422705717.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gozenabuzixi.onlinewebshop.net/3693875034.pdfIn PDF document text
    • http://surafupomef.epizy.com/boy_scout_uniform_pants_for_sale.pdfIn PDF document text
    • http://loxexezusus.rf.gd/nanisafukurexuri.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_off0000cafe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAFE 5452 bytes
SHA-256: 9ae3ad697038a9f6e7970914b1ea4479f81e132f3aa3a783c5fb8b172c21f360
font_01_sfnt_off0000dda8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDA8 10352 bytes
SHA-256: 76a993f51a8f1a60bb14225a725fa4cf9147800214e24fd42821a8cf06c2b452