Malicious PDF — malware analysis report

Static analysis result for SHA-256 4459b5c3cdc9cb3c…

MALICIOUS

PDF

250.6 KB Created: 2022-03-25 02:02:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-12
MD5: 553c9127e5a1509cd66d65f3772cae07 SHA-1: 41adafd3943c4f9a511bf19fa307368a8630c417 SHA-256: 4459b5c3cdc9cb3c3cbd6dfdec73275199a5d5f2597b76bf9c8ccedc76c02185
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple heuristics indicating it's a phishing lure, specifically using an SEO redirector to disguise the malicious intent. The presence of numerous embedded URLs, many pointing to compromised CMS upload storage, suggests an attempt to host and distribute further malicious content. While no scripts were explicitly extracted, the PDF structure and URL patterns are strongly indicative of a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8194

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 https://lazav.co.za/XSRYdR1H?utm_term=circleville+letter+writer PDF link annotation
    • http://prtl.pl/userfiles/file/miwogedi.pdfIn PDF document text
    • https://pastijptoto.com/contents/files/marosofogij.pdfIn PDF document text
    • http://thiennhanduong.com/ckeditor/kcfinder/upload/files/kuvetima.pdfIn PDF document text
    • http://paradoxine.com/upload/files/14423435833.pdfIn PDF document text
    • https://retentionstudentexperience.com/wp-content/plugins/formcraft/file-upload/server/content/files/16201f7ed8543b---vokifobalajipewogisul.pdfIn PDF document text
    • http://isped.net/kcfinder/upload/files/gorajujuk.pdfIn PDF document text
    • http://igigeothermal.jp/userfiles/file/625826327.pdfIn PDF document text
    • http://avto-sova.ru/upload/files/1357350488.pdfIn PDF document text
    • http://myshalewell.com/userfiles/file/76155612076.pdfIn PDF document text
    • http://rlmlaw.com/images/edit_images/file/wobojulujituraposogisej.pdfIn PDF document text
    • http://merten-antik.su/kcfinder/upload/files/gobajazanob.pdfIn PDF document text
    • https://e-s-c.fr/lib/ckeditor/kcfinder/upload/files/gedegegajodudasonup.pdfIn PDF document text
    • https://aurorabersinar2.com/contents/files/rodefedopopegadowutezebax.pdfIn PDF document text
    • http://www.fairvalesecondary.co.za/kcfinder/upload/files/letux.pdfIn PDF document text
    • https://celebicatering.com/upload/ckfinder/files/44069057163.pdfIn PDF document text
    • http://islamsamara.ru/upload/files/rodumewisuda.pdfIn PDF document text
    • http://www.shjkyq.com/up_files/FCK/file/97995283546.pdfIn PDF document text
    • https://unifor975.ca/userfiles/file/japuwizuvugarovoju.pdfIn PDF document text
    • http://www.alm-machines.be/kcfinder/upload/files/55629389013.pdfIn PDF document text
    • http://mfplus.ba/wp-content/plugins/formcraft/file-upload/server/content/files/1620196f9b33ba---tizozemuzixudukeguruf.pdfIn PDF document text
    • https://hunglivet.com/uploads/files/202203241848005878.pdfIn PDF document text
    • https://tecsal.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1622d0a634461d---kikitonutexowat.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_off00038154.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x38154 16560 bytes
SHA-256: 924ad5cb737cfd9a34472b2046831991df4d3950e5f0d7b552a18309318c2ee9
font_01_sfnt_off0003986f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3986F 17780 bytes
SHA-256: 7abcb12f1ba039068cbff97bd9e5221a25554e32aa42057394404699d63944a6
font_02_sfnt_off0003c6bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3C6BF 9852 bytes
SHA-256: 8faa9ef1ee4093ae36305710798c16e010486820836e881ce710a3f70441fb2a