Malicious PDF — malware analysis report

Static analysis result for SHA-256 a884126cb7158988…

MALICIOUS

PDF

69.3 KB Created: 2021-02-11 18:10:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: ca6a9875370f7f4ddab3e1c73d79265e SHA-1: a790bf1bf308cb38a835bd91f549b9ef3166292b SHA-256: a884126cb7158988532c8f896f26c56b167d942d813b632978dfed6e76580877
196 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
  • 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.
  • 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://maypoin.ru/wix?keyword=luxemburg-casco+school+district+luxemburg+wi PDF link annotation
    • https://pebarefilegiz.weebly.com/uploads/1/3/5/3/135325086/vivepagamuwene.pdfIn PDF document text
    • https://cdn.sqhk.co/laxefotogulo/jMgijcG/vukekomafa.pdfIn PDF document text
    • http://kino-vezde.ru/43675581547lxvg8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465688/normal_5fe4136202f01.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380070/normal_5ff4eeff1c1ce.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417807/normal_5ff2a41f5a2f0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426073/normal_5fcdf26f8b6f9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495839/normal_5fc8f2a140ef8.pdfIn PDF document text
    • https://jimigafekalese.weebly.com/uploads/1/3/1/4/131407537/pulimixanogu_zedine.pdfIn PDF document text
    • http://vash-komfort5.ru/kuxubulajh18zg.pdfIn PDF document text
    • http://rentline.pro/asian_cup_2019_schedulepbilx.pdfIn PDF document text
    • https://cdn.sqhk.co/jetirivotu/ihhifYT/13476329830.pdfIn PDF document text
    • https://vozunekoba.weebly.com/uploads/1/3/4/9/134902797/rolerivu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480423/normal_6017b2ab3507b.pdfIn PDF document text
    • https://cdn.sqhk.co/wejagamewo/gcLYJxq/ximakimomama.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/baposivarabuj/gexopukatalafedewirudarod.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_off0000d1fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1FE 5624 bytes
SHA-256: 1b0cfe71073cf3e279e5b2dea11197efce9aaaeffe31f634d189b660a5fba8b3
font_01_sfnt_off0000e50f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE50F 10328 bytes
SHA-256: 5fee658b3b6fd5cef5ecf4c21784ea08fd05f83a900d863a5d0f605cd8f5afea