Malicious PDF — malware analysis report

Static analysis result for SHA-256 91b6d0c15171f2bf…

MALICIOUS

PDF

659.7 KB Created: 2021-07-02 05:15:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 52da2c144506f8826dd60871349d42e6 SHA-1: a67212f28c2fd67f048347957accc1ad067ee9b0 SHA-256: 91b6d0c15171f2bf58a67419a89a37c2e1da5ad0259b67cd85080555c54536d3
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links pointing to compromised CMS upload storage and SEO redirectors, indicating a phishing attempt disguised as a free download. The ClamAV detection and ML classifier further support its malicious nature. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it is designed to lead the user to malicious content, likely through a JavaScript exploit or redirect chain.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7472

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://trucraftsmanship.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7962a7bc02---55306531557.pdf In PDF document text
    • https://ipcare.nl/wp-content/plugins/super-forms/uploads/php/files/c6q4gnjb1qahbt65g8phmbl99t/gipewabufivuzebopigez.pdfIn PDF document text
    • http://freetourscadiz.com//ckfinder/userfiles/files/xoxogujamoxolu.pdfIn PDF document text
    • https://stewsites.com/wp-content/plugins/super-forms/uploads/php/files/af0b63e1746f67a9c7de867d2cc8e1b4/madogenunolixexa.pdfIn PDF document text
    • http://www.mostenpo.jp/userfiles/files/91170220884.pdfIn PDF document text
    • http://yuha.be/_files/file/44519597337.pdfIn PDF document text
    • http://wamer.org/userfiles/file/dazakod.pdfIn PDF document text
    • http://ptk-astana.kz/wp-content/plugins/super-forms/uploads/php/files/48158c1fc044b5eda13b98ad1cc9493a/55578746678.pdfIn PDF document text
    • https://beaumont-residence.com/wp-content/plugins/super-forms/uploads/php/files/88h5tbrh0om5s91f3qav6ugit6/tonisepofe.pdfIn PDF document text
    • http://vegasoft.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160a35a7c4ba5a---fotirozuvaje.pdfIn PDF document text
    • https://kodcomputers.ro/2664/uploads/wogobedaxoboxegivunavaku.pdfIn PDF document text
    • http://www.gametimecatering.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095210e44c74---texitamikuz.pdfIn PDF document text
    • https://mannerfeltdesignteam.se/ckfinder/userfiles/files/kiraza.pdfIn PDF document text
    • http://www.gametimecatering.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8ba9464143---zajew.pdfIn PDF document text
    • http://www.barankayalar.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16072345def71c---53253258915.pdfIn PDF document text
    • https://asiatravel.kg/wp-content/plugins/super-forms/uploads/php/files/c42db56efd9ebfa10844c64c732b135c/nepozija.pdfIn PDF document text
    • https://myhoorayhealth.com/wp-content/plugins/super-forms/uploads/php/files/4gftt58cbaj7g702kpdc41c4e7/14636376319.pdfIn PDF document text
    • http://www.inhd.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c281ab96dbd---kukevomuletiwuvatepaludis.pdfIn PDF document text
    • http://www.infranetltd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160737beb9c966---butunesawekupedafaxidika.pdfIn PDF document text
    • http://remont-etalon.ru/upload/files/66279995832.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=fundamentals+of+electrical+drives+by+gk+dubey+pdfPDF 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_off0009d7d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9D7D1 19048 bytes
SHA-256: 1ce85fb10533dcbeeb95b5f886532de789050d92723d11af2e1a3b67949937b2
font_01_sfnt_off000a0801.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA0801 11452 bytes
SHA-256: b479c54758d631fd5b868ea0af549f6d8b8060bf96babca33cda0808af2924ae
font_02_sfnt_off000a22bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA22BB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1