Malicious PDF — malware analysis report

Static analysis result for SHA-256 ccfda5f90b95444a…

MALICIOUS

PDF

91.2 KB Created: 2021-08-26 07:50:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 32e2220a00bb9f62d9b4ba4f16e00abd SHA-1: 239550431e9c41ec38f1c028b60602f5628a5366 SHA-256: ccfda5f90b95444ae418089f8a2c2786e717b80155b9fade5ad13733e824c945
164 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many of which point to compromised WordPress upload directories or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of urgency lures further supports a phishing or scamming attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://irlanc.ru/uplcv?utm_term=what+is+a+letter+of+interest+vs+cover+letter PDF link annotation
    • http://lacasedescaraibes.fr/file/1636122657.pdfIn PDF document text
    • https://www.stamfordtaxis.com/wp-content/plugins/super-forms/uploads/php/files/a2fsvpi8hg5kto125pin7ea9mb/budamovosirutu.pdfIn PDF document text
    • https://avgdesign.com/userfiles/file/96417290440.pdfIn PDF document text
    • http://fzsvybbs.at/userfiles/file/56765137966.pdfIn PDF document text
    • http://aps-mes.com/files/file/wipus.pdfIn PDF document text
    • https://mavismanagement.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078a9f8191dd---nutirujefogas.pdfIn PDF document text
    • https://capital-publishing.com/ckfinder/userfiles/files/22600989028.pdfIn PDF document text
    • http://copy2d.com/ftp/image/file/46476609365.pdfIn PDF document text
    • https://eobliecky.sk/userfiles/file/pegesitorofitaxomokudu.pdfIn PDF document text
    • http://copy2d.com/ftp/image/file/64554401371.pdfIn PDF document text
    • http://arohitourandtravels.com/userfiles/file/xenof.pdfIn PDF document text
    • https://confetti-seasons.ru/upload/files/sofigamesudesetal.pdfIn PDF document text
    • http://www.shadowrangers.live/img/files/bupaduzuwatafameduwiwok.pdfIn PDF document text
    • http://www.victorian-manor.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607a3bb45f0e3---nadarebeladedobipinedari.pdfIn PDF document text
    • http://conwaychristian.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a5ae188b413---foketefikafegoxematotag.pdfIn PDF document text
    • http://diegogenna.it/userfiles/files/86973076030.pdfIn PDF document text
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/895e0e5da34bb4ded0244f43b170684f/fiwodanilawerutori.pdfIn PDF document text
    • https://semineebrasov.ro/printuri-fi/files/mojeja.pdfIn PDF document text
    • https://hacunamatata.ru/wp-content/plugins/super-forms/uploads/php/files/8edf4df88be1efdc53dece7376f32351/zekuzukesa.pdfIn PDF document text
    • https://www.corridar.com/wp-content/plugins/super-forms/uploads/php/files/e3rc5v67fqisabne7h9jinnecq/41304625978.pdfIn PDF document text
    • https://vanphongphamhienluong.com/upload/files/97693210183.pdfIn PDF document text
    • https://digireg.se/upload/semedavipunewevokezege.pdfIn PDF document text
    • http://cleangroupbd.com/ck/upload/files/11038350417.pdfIn PDF document text
    • https://shining4u.com/wp-content/plugins/super-forms/uploads/php/files/174421268a0f3180ff95ffaed676bf00/30971215569.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ffe3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFE3 17192 bytes
SHA-256: 8e60449ec7f6058b6f96bcdd9031a5b48cf3c2981d9dfa4b48350d54c2491ace
font_01_sfnt_off00012c1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C1C 10492 bytes
SHA-256: 86c9a94f9bc007644f1717f1c45519a7dc26807081ca6657be4726623052c953
font_02_sfnt_off000143f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x143F9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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