Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b6ff5e554f39f51…

MALICIOUS

PDF

93.1 KB Created: 2021-06-28 08:07:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 20ef2efd1baccc51814cfd1b2cfa795b SHA-1: b4541d9cb8d5c87acfb60d1b8edd59174c0e536a SHA-256: 1b6ff5e554f39f517f8f373510e26f2833414f7d84c6540001bd98a0e284de0e
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised WordPress sites, specifically within form upload directories. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The presence of a link farm on disposable hosting further supports a malicious purpose.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9927

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.jhannahs.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c48abb94a59---fugodidufaxebib.pdf In PDF document text
    • http://architettoseneca.com/userfiles/files/54877673819.pdfIn PDF document text
    • https://www.davidcosz.de/wp-content/plugins/super-forms/uploads/php/files/5i3kqh8hadvhccjov3u3hkhmkl/rulabolororerop.pdfIn PDF document text
    • https://burkina-businessschool.com/business_school/uploads/file/76527773641.pdfIn PDF document text
    • http://www.optionassurance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160be38a1b2e1d---rudakeni.pdfIn PDF document text
    • https://artsketch.ru/wp-content/plugins/super-forms/uploads/php/files/5bb94b34dd4a601c704183e1cec8350d/92736675996.pdfIn PDF document text
    • http://limpiasol.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c17c2671bc7---fegugajidiwewis.pdfIn PDF document text
    • https://cvenhancer.com/wp-content/plugins/super-forms/uploads/php/files/60cf0d5be2103c407f2fd0bae19f2e34/sapevad.pdfIn PDF document text
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/a4fovkkspb6oicalkqjj4mh8da/gekiben.pdfIn PDF document text
    • http://www.rlktechniek.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1606edaaddaf4e---6361023961.pdfIn PDF document text
    • https://www.cdscabling.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160bc678bb3c36---powiwamug.pdfIn PDF document text
    • http://serendipityorlando.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ed83009125---judufowujudalivekijolekes.pdfIn PDF document text
    • http://odpadykj.cz/UserFiles/File/44394972049.pdfIn PDF document text
    • https://snabavto.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c9f7a6e989---2482924495.pdfIn PDF document text
    • https://na-nule.ru/wp-content/plugins/super-forms/uploads/php/files/t426jnco4p5mfnu3gjp4cof620/57378258087.pdfIn PDF document text
    • http://kovacsoltvaskerites.hu/images/file/10143360730.pdfIn PDF document text
    • http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac0ead3ca55---zarizumivivet.pdfIn PDF document text
    • https://www.rowtheerne.com/wp-content/plugins/super-forms/uploads/php/files/235caf852628c5ef9299e3264303bd5d/446022805.pdfIn PDF document text
    • https://www.chauffeur-prive-nice.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16099df119c60b---dages.pdfIn PDF document text
    • http://www.jcca.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/16082f8e8c20a9---gakezutazokezuvudako.pdfIn PDF document text
    • https://www.generalutilities.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7bfc37ccff---18021095268.pdfIn PDF document text
    • http://xn----8sbnbd9chja.xn--p1ai/userfiles/file/26083565076.pdfIn PDF document text
    • https://pakistanchristiancongress.org/userfiles/file/disenun.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=colour+blind+people%27s+viewPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f348.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF348 17532 bytes
SHA-256: af316e66261c3d75e02b29647d133c4e008eb0c68853f4a29a5b5dbfbbe9cdb6
font_01_sfnt_off00012131.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12131 10580 bytes
SHA-256: 9af1f8f654d41e3f1df006c591fb8ef1725c68538eb3a203506001a01b2012b1
font_02_sfnt_off00013948.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13948 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off00015159.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15159 16112 bytes
SHA-256: a493cf14d42598d256b41302b6b737aafa7e6b0f151a2977567a5726682abbae

Open this report in the interactive analyzer, or submit your own file for analysis.