Malicious PDF — malware analysis report

Static analysis result for SHA-256 4450f18a868ca8b6…

MALICIOUS

PDF

305.1 KB Created: 2022-03-21 13:06:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-12
MD5: e6de80aca3abdb2767b607befc573ee5 SHA-1: 8f72eca9cbce0fb16a7d579d0cb4569419248405 SHA-256: 4450f18a868ca8b6ed64be872e5c6d0c5f1968cf17b87422b84a9975d460db84
136 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a PDF that contains multiple embedded URLs, one of which is identified as an SEO redirector for a free-download phishing lure. The ClamAV detection and ML classifier further indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to trick users into downloading further malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8991

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://mifuj.co.za/XSRYdR1H?utm_term=erikson%2527s+psychosocial+stages+summary+chart PDF link annotation
    • http://aiaato.com/FileData/ckfinder/files/20220201_6993976AC6AA8D9B.pdfIn PDF document text
    • http://afi-dwls.de/upload/files/52145699552.pdfIn PDF document text
    • http://galerie45.com/userfiles/file/tepex.pdfIn PDF document text
    • https://adikkeempat.com/contents/files/46133166853.pdfIn PDF document text
    • https://socardan.com/userfiles/files/30637182532.pdfIn PDF document text
    • https://www.myjamaicais.com/wp-content/plugins/super-forms/uploads/php/files/20069b05919568b242ab15ce9c4f121f/69153661811.pdfIn PDF document text
    • http://erbamedica.org/userfiles/files/rowopiwil.pdfIn PDF document text
    • http://reklama-kemerovo.ru/files/files/82428543199.pdfIn PDF document text
    • http://xinyuemu.net/assets/202202/files/20220209220137423344.pdfIn PDF document text
    • http://ez-surveying.com/htdocs/cljr/data/files/59755892633.pdfIn PDF document text
    • http://vaynhe.com/upload/files/lenod.pdfIn PDF document text
    • https://sy-chemical.com/UserFiles/file/79478737205.pdfIn PDF document text
    • https://www.ideaklinik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16236bf7cc942a---jeneliwixatatutisafoja.pdfIn PDF document text
    • http://www.iharoskezmuvesek.hu/ckeditor/kcfinder/upload/files/ladetudukuv.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00045414.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x45414 18568 bytes
SHA-256: 69d1431dbc3ed283335b7b792e2562271befd0c2fc61ac9bf38ec1615a0677e5
font_01_sfnt_off000484f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x484F7 16560 bytes
SHA-256: 924ad5cb737cfd9a34472b2046831991df4d3950e5f0d7b552a18309318c2ee9
font_02_sfnt_off00049c17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x49C17 11144 bytes
SHA-256: 52d43d0185affd82a3a653304f4f65d637aad4f2a293c294c5d42fd1ebf680ae

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