Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc8e31cc12e03954…

MALICIOUS

PDF

89.4 KB Created: 2021-06-26 01:00:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 9ccf5cfba2b2086150c4f98ad6833670 SHA-1: 62962d53d0884a7f74f642c1c2088e00ec4c6b8d SHA-256: cc8e31cc12e03954dfee5c96cebfd88544ae132e66c5012f1a1b494aaf49991b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to compromised WordPress sites, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of external URIs and link farms points to a strategy of directing users to malicious content, likely a secondary payload or phishing page.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9924

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 https://synerhu.ru/uplcv?utm_term=macbook+after+effects PDF link annotation
    • http://trackeg.com/en/wp-content/plugins/formcraft/file-upload/server/content/files/160a8fe8adc90e---badomejodulixokevoja.pdfIn PDF document text
    • http://la-roofers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160acc91e7288f---20493454793.pdfIn PDF document text
    • http://mya1fc.com/files/ckuploads/files/gatagimo.pdfIn PDF document text
    • http://recamonde.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16087f66d90da2---60770656953.pdfIn PDF document text
    • http://vtracauto.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075af18673c1---teronufaridimerafa.pdfIn PDF document text
    • http://www.alex-vasilkov.ru/images/wisdom/file/64942172504.pdfIn PDF document text
    • https://tamtam.com.ua/wp-content/plugins/super-forms/uploads/php/files/c216236bc615824c4a0c884689a04010/34531930276.pdfIn PDF document text
    • http://lorichphoto.com/pictures/file/66153536568.pdfIn PDF document text
    • https://nhachoxebus.com/upload/fck/file/jekimozuvaxa.pdfIn PDF document text
    • https://socialchangefactory.org/wp-content/plugins/super-forms/uploads/php/files/2890602c738c204d063b3e3906a47bca/koxazegag.pdfIn PDF document text
    • https://xn--80aaaglcftt5alesfkk7f.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/b4df73e63bdf9e96d7114843c296e7e2/27958004890.pdfIn PDF document text
    • https://staffxrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/8a7a96b2ffc9a886c5413f03a96353e3/zofidikabi.pdfIn PDF document text
    • https://georgiamusicpartners.org/wp-content/plugins/super-forms/uploads/php/files/62e9e3f5d545c53f5c95a68693e105cc/refisukozatejovova.pdfIn PDF document text
    • http://wanyuantemple.tw/userfiles/file/63545712380.pdfIn PDF document text
    • https://www.sharpeningfactory.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f61f568b82---dimolokapupebezeratar.pdfIn PDF document text
    • http://www.northeastmarquees.com/wp-content/plugins/super-forms/uploads/php/files/ade265613d4d533b52df6c087851bf63/baxinokakunob.pdfIn PDF document text
    • https://datajournonepal.org/files/54389888892.pdfIn PDF document text
    • http://www.sg-callenberg.de/wp-content/plugins/formcraft/file-upload/server/content/files/160bfd25aadf1b---nifapezitevatisajekud.pdfIn PDF document text
    • http://grupomarsamo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b905a122efb---4289932950.pdfIn PDF document text
    • https://www.baptistenhardenberg.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160810486ba7e2---xakedu.pdfIn PDF document text
    • https://www.parkgest.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160c26e18354be---pudezukovomugigapuwu.pdfIn PDF document text
    • http://agendatourvietnam.com/hinhanh/file/pedusepexulajatovuwazijol.pdfIn PDF document text
    • https://yourtuscanyguide.com/wp-content/plugins/super-forms/uploads/php/files/t4dfsrfeg01btk0t1ebolotod2/77745269598.pdfIn PDF document text
    • https://retentionstudentexperience.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070f033840d5---mijovowu.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e089.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE089 10312 bytes
SHA-256: b49740417a62d30491d855bf504260a818f2b838097d2fdac6943a6b57823048
font_01_sfnt_off0000f806.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF806 23892 bytes
SHA-256: 42c4de04cf7e2c13539a4c0436f85f1b1acf604d3d85e30f29e553b959e9132d
font_02_sfnt_off000132a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132A5 2688 bytes
SHA-256: a2ac081e08affb0ecf0a940f0eec8b4be73ee6624f5ae6ef3b741cdea718dd26
font_03_sfnt_off00013de4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13DE4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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