Malicious PDF — malware analysis report

Static analysis result for SHA-256 4451918592d48616…

MALICIOUS

PDF

399.9 KB Created: 2021-12-14 23:00:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-12
MD5: fe501cb9911554b77af1466101e46361 SHA-1: 5d094b607b5805d9c7ef6a4ee0c1cb8ee653bbc8 SHA-256: 4451918592d48616d5e85e5a6a16878f287b029d946531470bd4da1ae036ad37
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to compromised WordPress upload storage, identified as a lure for free downloads and phishing. The ClamAV detection and ML classifier further indicate malicious intent. While no scripts were directly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7982

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
  • 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.
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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 http://meadescafe.com/userfiles/file/63408446600.pdf In PDF document text
    • https://praktijk-fix.nl/userfiles/image/file/repowazuxexumerizoto.pdfIn PDF document text
    • http://alimentosldm.com/userfiles/file/88757501751.pdfIn PDF document text
    • http://chengzechem.com/upload/files/79614448784.pdfIn PDF document text
    • http://hanauhrova.cz/files/91406349376.pdfIn PDF document text
    • https://www.entornopublicitario.com/wp-content/plugins/super-forms/uploads/php/files/271c160d18e949dcf27452e960926b12/rizodamimoguja.pdfIn PDF document text
    • http://czdashan.cn/uploadfile/file/2021121206125973499.pdfIn PDF document text
    • https://hrmconsulting.biz/upload/files/bisudajanirobobusubizawo.pdfIn PDF document text
    • http://heninrealty.com/userfiles/files/rekenedotobevip.pdfIn PDF document text
    • https://sts-cct.com/app/webroot/userfiles/files/33945281869.pdfIn PDF document text
    • http://rent-lease-no1.com/userfiles/file/20211206152331.pdfIn PDF document text
    • https://minlinart.com/archive/upload/files/xefox.pdfIn PDF document text
    • http://msdoubrava.cz/foto/images/file/6701805662.pdfIn PDF document text
    • http://coiffurenais.com/userfiles/file/titevatigutulabigasuxu.pdfIn PDF document text
    • http://furkansigorta.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1614482f13ab98---xixisazaxitirojalezolobu.pdfIn PDF document text
    • https://infoenergie-loire.org/userfiles/file/zojimalakifekutunove.pdfIn PDF document text
    • http://inwallendorf.de/userfiles/file/98863637071.pdfIn PDF document text
    • https://cecprint.com/images/file/61155468850.pdfIn PDF document text
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/q9ctt09hse7cd5fk74da9q4537/xibafamuvofibuzurip.pdfIn PDF document text
    • http://infinity-pro.ru/userfiles/file/84153474432.pdfIn PDF document text
    • https://swotin.com/wp-content/plugins/formcraft/file-upload/server/content/files/16185eabb26d47---zopegoses.pdfIn PDF document text
    • https://nuregio.de/wp-content/plugins/formcraft/file-upload/server/content/files/1619c654506412---sowiwalulelelova.pdfIn PDF document text
    • http://feedproxy.google.com/~r/MbOu/~3/UsNeCLCzgYg/uplcv?utm_term=how+to+write+a+case+report+bmjPDF link annotation
    • 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_off0005d02d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D02D 10732 bytes
SHA-256: 8f4064b412e5178e138b85aab07fd787bdf09db37ddbfdf2c59d66d37cbff3a7
font_01_sfnt_off0005e8a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E8A8 18916 bytes
SHA-256: db3661d92aa771eb32949ad435941a232e7e9197da6c447da0f1f7f8fe16629f
font_02_sfnt_off00061953.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61953 16416 bytes
SHA-256: cfa2c3fbce80cc5607e01af033b793d17c57c214fb1d96e845eedea48cccd336