Malicious PDF — malware analysis report

Static analysis result for SHA-256 71230f454fd5cd4e…

MALICIOUS

PDF

85.0 KB Created: 2021-06-28 15:33:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 06d7b647b2cb617e870823875ad4786e SHA-1: f27940fb7a9c62249b3251e2e448a554c71a932a SHA-256: 71230f454fd5cd4eaa6445d5e4926e519f38598137eef5b5d1fdf42ee8710290
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. Several heuristics indicate the PDF acts as a link farm, pointing to numerous URLs hosted on compromised WordPress sites. These URLs are likely used to distribute malicious content or conduct phishing attacks.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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
  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. 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://www.megasaludips.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a509baddc8---julaxivib.pdf In PDF document text
    • http://pvsystreports.com/wp-content/plugins/super-forms/uploads/php/files/0kdfdnnou1hna8q0pbq88dqu34/tagovumixuvelido.pdfIn PDF document text
    • http://fecoil.com/userfiles/file/47452813735.pdfIn PDF document text
    • http://www.driftime.ee/wp-content/plugins/formcraft/file-upload/server/content/files/160b3d6f1f0d40---47241183280.pdfIn PDF document text
    • https://evocative.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1608cb74b53da6---77234624344.pdfIn PDF document text
    • http://www.skupp.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160bfc3ce7743b---92464678416.pdfIn PDF document text
    • http://www.musicmaestrodiscos.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160b072393c1db---86532207801.pdfIn PDF document text
    • http://ashole.hu/UserFiles/File/85525191726.pdfIn PDF document text
    • https://sg-design.top/wp-content/plugins/super-forms/uploads/php/files/5a829a47d07a9d3f0237f601a600b400/5150181561.pdfIn PDF document text
    • https://dbmotorbrokers.com/userfiles/file/51228097423.pdfIn PDF document text
    • https://hightechrustremovers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607900b2edde9---panus.pdfIn PDF document text
    • http://budoprojekt.eu/obrazy/file/84995080781.pdfIn PDF document text
    • https://llibreriaha.com/img/events/file/75666344974.pdfIn PDF document text
    • http://accurateverdicts.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b331e19bf4d---22880885428.pdfIn PDF document text
    • https://liniagdanskzydowo.pl/files/vesididosus.pdfIn PDF document text
    • http://salonlomi.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160861dc3976f4---44846398356.pdfIn PDF document text
    • https://nicemexico.net/wp-content/plugins/formcraft/file-upload/server/content/files/160979e2c522bf---suzajakuziduleneni.pdfIn PDF document text
    • https://webtraffic.ch/wp-content/plugins/super-forms/uploads/php/files/dc76qibb0tv83304ui9v4jf908/25553585333.pdfIn PDF document text
    • http://www.sensible-seeds-premium.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a307616633a---16700881162.pdfIn PDF document text
    • http://seabeachthailand.com/UserFiles/file/20895250757.pdfIn PDF document text
    • https://hogies.com/includes/template/uploads/file/9908087491.pdfIn PDF document text
    • https://mindweave.co.uk/wp-content/plugins/super-forms/uploads/php/files/b6a572gsd5uudr7pc2mcvvruj5/suwixowanalajemudavabe.pdfIn PDF document text
    • https://ocvirapuato.com.mx/wp-content/plugins/super-forms/uploads/php/files/c760328cc5850ccc2125347af46403d8/dekod.pdfIn PDF document text
    • http://webinaris.biz/ckfinder/userfiles/publics/files/57426406897.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=braxton+hicks+contractions+26+weeksPDF 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_off0000e893.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE893 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000100a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100A5 16516 bytes
SHA-256: cf8f8306728a7944a4ff335c5993b4e5b031daf335e081c684a6cc16e86f3443
font_02_sfnt_off00012b8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B8E 10904 bytes
SHA-256: 1ea6f293f32e376e0c488bbf8874eabc46750ca83659b4de9afb4d9dfa269fd9

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