Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c07aa4cc2045b56…

MALICIOUS

PDF

86.6 KB Created: 2021-06-26 15:26:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 8c5ba3512b451ada185e762aa315c842 SHA-1: 27b0496bfdbc5d18a07d1a4c82a08fbc7e7b2854 SHA-256: 6c07aa4cc2045b56a83c9d4b04e65340f886cf3bcd1c5d91826deccac59d2ffa
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links, many hosted on compromised CMS platforms or disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of a 'download button' heuristic further supports the lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://vieclamday.com/userfiles/file/54708108273.pdf In PDF document text
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/qfevnamtah31vb70nh8ar1nrrt/46152950350.pdfIn PDF document text
    • http://xn----7sbabaajmdfbk3ddf3azka3b6a2r.xn--p1ai/ckfinder/userfiles/files/73493045548.pdfIn PDF document text
    • http://sh-ruiyangcpa.com/userfiles/file/2021-6///202163942567336.pdfIn PDF document text
    • https://primax.fr/wp-content/plugins/super-forms/uploads/php/files/8176dvrein0fkfevo80tsvefa7/zokonimowoserup.pdfIn PDF document text
    • https://discoverapartmentsforrent.com/wp-content/plugins/super-forms/uploads/php/files/7c2ccc7c5c8ea904a7e50f9581860cab/webasujebizoxud.pdfIn PDF document text
    • https://www.goldenplanet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160cee00474f6b---17858284826.pdfIn PDF document text
    • http://creptiles.dk/userfiles/file/sijetemubopijisinasaf.pdfIn PDF document text
    • https://abril.pe/wp-content/plugins/super-forms/uploads/php/files/334inc3crit2mi88okee2emgrs/vugewiwe.pdfIn PDF document text
    • https://www.pal-kont.hu/wp-content/plugins/super-forms/uploads/php/files/82ea5b63126e2ba7133ca800c16dca5d/ropasudexutalikefoxidefe.pdfIn PDF document text
    • http://studiotecnicoarduini.eu/userfiles/files/21431159007.pdfIn PDF document text
    • http://lifestyleufa.ru/wp-content/plugins/super-forms/uploads/php/files/7cf337c82c764e239d96e0a857f23861/70067071518.pdfIn PDF document text
    • http://writtenmail.com/upload_images/file/tiwutenivedokazona.pdfIn PDF document text
    • https://ontime-taxi.kg/wp-content/plugins/super-forms/uploads/php/files/a9a46966d2894b52f0801e957c417ef8/44873351302.pdfIn PDF document text
    • http://chicagohalo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d5380b482e---50505689833.pdfIn PDF document text
    • http://www.holderit.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087979c01332---91750411695.pdfIn PDF document text
    • http://www.zopfitravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076d053122c1---zodorumozadakewikoj.pdfIn PDF document text
    • http://thm-holding.ru/wp-content/plugins/super-forms/uploads/php/files/9c45d02aa925a214a0ed0c284317407a/nogekemoditidefutukozu.pdfIn PDF document text
    • https://gservicepz.com/wp-content/plugins/super-forms/uploads/php/files/15e70dd8dabd8b931dcfb09e46e26d1b/momabamiva.pdfIn PDF document text
    • https://allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/aadd6a9987c27d9ee785876de0734418/74317741938.pdfIn PDF document text
    • https://www.marthatrotts.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16081fd9f4f0ee---52374264436.pdfIn PDF document text
    • http://www.festivalmarrakech.info/wp-content/plugins/formcraft/file-upload/server/content/files/160770159d12d1---vekemuk.pdfIn PDF document text
    • https://alamansyria.com/userfiles/file/35041032883.pdfIn PDF document text
    • https://brokenspoke.com/wp-content/plugins/super-forms/uploads/php/files/1c50839d9828400a2051a69d6b3a596c/pifezirorolilefazu.pdfIn PDF document text
    • https://www.lesson-online.org/wp-content/plugins/super-forms/uploads/php/files/mvhgoh6c7rqkd3j2q6i5vhpce4/67131875287.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=kgf+chapter+1+movie+download+in+tamilrockersPDF 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_off0000ee2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE2D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010644.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10644 11352 bytes
SHA-256: 49dbc4d9895d5d143a54f7629a32540ef6e86fc8a372f802c54dd894c047e64a
font_02_sfnt_off000120bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120BB 16848 bytes
SHA-256: 5a20c792a8348a6fa7957ad12cfe79da09f7f794cd5957aac2e7d1b162dbc786

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