Malicious PDF — malware analysis report

Static analysis result for SHA-256 380d4221381606ce…

MALICIOUS

PDF

90.6 KB Created: 2021-02-27 02:58:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 40dea031293b5b4e4fb28bd8611ea773 SHA-1: 267087cbedbac0c6594621213a1cd7d788fa2d2d SHA-256: 380d4221381606ce88f06e2535d6ffaded0d449d28b66290465e357fba5d34db
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan threat. It contains an embedded URI and a high-severity heuristic firing for a PDF SEO UTM redirector link, pointing to the URL https://kuzutuzo.ru/aws?utm_term=stress+reduction+activities+for+college+students. This suggests the document's primary purpose is to lure users to this external site, likely for phishing purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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://kuzutuzo.ru/aws?utm_term=stress+reduction+activities+for+college+students PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4405674/normal_5ff45d6415dc0.pdfIn PDF document text
    • https://cdn.sqhk.co/soziwariru/2qgfejj/37389695740.pdfIn PDF document text
    • https://cdn.sqhk.co/papebikuwi/f9WggFv/star_wars_characters_costumes_diy.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402519/normal_5ff0f5552217e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473645/normal_602d80e21f6ce.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470826/normal_5fdda3ea5e8d4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466673/normal_5fd298bee5c41.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380867/normal_5fc6c91b85516.pdfIn PDF document text
    • https://cdn.sqhk.co/lewoxiguj/fhejdgj/1246402266.pdfIn PDF document text
    • https://cdn.sqhk.co/zijigemeworu/jhike3i/murilifozakefedipuv.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471971/normal_5fcc2b8d0bd32.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454430/normal_5fe23a7b9f9ba.pdfIn PDF document text
    • http://taxurofetizi.22web.org/81496314300.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/metakibeme/aluminium_potassium_sulphate_msds.pdfIn PDF document text
    • https://s3.amazonaws.com/wetowuzuxit/how_to_dissolve_epsom_salt_in_water.pdfIn PDF document text
    • https://s3.amazonaws.com/wesezuzuvalirik/69287190452.pdfIn PDF document text
    • https://s3.amazonaws.com/ronenitevodo/bukuxokufupune.pdfIn PDF document text
    • https://s3.amazonaws.com/rodakarugupoko/49329131982.pdfIn PDF document text
    • http://mapixuxiloko.epizy.com/website_landing_page_free.pdfIn PDF document text
    • https://s3.amazonaws.com/kubafezin/mavubimesosev.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012670.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12670 5352 bytes
SHA-256: 71e9a8d45b1b831891227ef5f2ebb0f976d2fc626f86242c60ccc55e5d6aee3a
font_01_sfnt_off000138ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x138BA 10500 bytes
SHA-256: f9473ec413113311583c539cbbbb2028eebdd50581b04e7fb9e98be759496fec

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