Malicious PDF — malware analysis report

Static analysis result for SHA-256 e23c3461006ae434…

MALICIOUS

PDF

61.8 KB Created: 2020-11-29 05:01:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-09
MD5: 3eba8b234d676d73b654af58457e0330 SHA-1: d6abecf5f5ae1419dfae8bdc2aa449a741f83e03 SHA-256: e23c3461006ae434c4602ba50c2d420739dc942d0827dca848271633ee1279be
254 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://traffmen.ru/wb?keyword=common%20adjectives%20in%20english%20pdf In PDF document text
    • https://gorelafuxom.weebly.com/uploads/1/3/4/4/134497365/jeluwu-rixemebu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488100/normal_5fb44e7c49972.pdfIn PDF document text
    • https://mibebedobosuv.weebly.com/uploads/1/3/4/3/134322580/0ca7fe7f9cc3c.pdfIn PDF document text
    • https://leziwave.weebly.com/uploads/1/3/4/4/134446015/sopidusexelogive.pdfIn PDF document text
    • https://fodexugamo.weebly.com/uploads/1/3/4/8/134851562/a893a0a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471710/normal_5fa8bd0987506.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/lorifumofelu/basseterre_high_school_st_kitts.pdfIn PDF document text
    • https://s3.amazonaws.com/wovugi/11895289270.pdfIn PDF document text
    • https://s3.amazonaws.com/zunaduxa/rawozukisupitavutoxefusik.pdfIn PDF document text
    • https://s3.amazonaws.com/kawotexulozax/film_bts_bring_the_soul.pdfIn PDF document text
    • https://s3.amazonaws.com/webipejonavuv/76324139480.pdfIn PDF document text
    • https://s3.amazonaws.com/wusone/near_doubles_worksheet_ks2.pdfIn PDF document text
    • https://s3.amazonaws.com/jemazejodep/81052701828.pdfIn PDF document text
    • https://s3.amazonaws.com/divikufifir/animasi_terima_kasih_power_point.pdfIn PDF document text
    • https://s3.amazonaws.com/felasorarabipis/narotawab.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_off0000b31a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB31A 5512 bytes
SHA-256: 486805c03b0a70dfb50245cb8cca02409ba0bbd6db56c4d59100555e546cc22b
font_01_sfnt_off0000c5c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5C2 10884 bytes
SHA-256: 37aee1e0029e4e0d32c40ecce76fa89e78ff6c64087f22d2281864e00500d644

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