Malicious PDF — malware analysis report

Static analysis result for SHA-256 d16c4fa2a52703c5…

MALICIOUS

PDF

84.4 KB Created: 2021-06-28 02:24:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: 7013afcfea795ec899cb6de4c95aa2e5 SHA-1: 7fbe6d0c8af24a34d1ec777eb3a3044e8c408f69 SHA-256: d16c4fa2a52703c510ed3eb2ab36bddf6de886a7cd6084d01a385a9c76cd53a7
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external URIs and links to compromised CMS upload storage, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a common phishing or downloader pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://drafthe.ru/uplcv?utm_term=how+are+nickels+made PDF link annotation
    • https://patriot.ch/wp-content/plugins/super-forms/uploads/php/files/dqfumm64d39bv3if4k6l5m5doc/11167936671.pdfIn PDF document text
    • https://stcatherine.ac.ug/wp-content/plugins/formcraft/file-upload/server/content/files/1607540be350e3---70965380679.pdfIn PDF document text
    • http://joyear.com/ckfinder/userfiles/files/67241560211.pdfIn PDF document text
    • https://serini-cloud.pl/uploads/editor/file/35597938059.pdfIn PDF document text
    • https://www.birdandwildlifeteam.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609bcdafa408f---nibebufexubusedemunuj.pdfIn PDF document text
    • https://fnb-concepts.com/images/uploads/files/38842189666.pdfIn PDF document text
    • https://ag-concept.ru/wp-content/plugins/super-forms/uploads/php/files/06942d98b1d873420d56a623d7bb7edc/jazofer.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2158d60237---55424627097.pdfIn PDF document text
    • https://markzone.az/wp-content/plugins/super-forms/uploads/php/files/r36l1tvhkci9spij0lo6s479bh/loxidarobutamuxebebot.pdfIn PDF document text
    • https://drmarlenebothma.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1608d8c02d6f39---1755357733.pdfIn PDF document text
    • https://snabavto.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa2c6304bc8---suketubefi.pdfIn PDF document text
    • https://camile.vn/wp-content/plugins/super-forms/uploads/php/files/cjhbqfupdpm7l9oar8supkeh66/subajod.pdfIn PDF document text
    • https://www.dartmusicfestival.co.uk/wp-content/plugins/super-forms/uploads/php/files/f8d297076c9570dec6ac04db7017538b/delezutitofu.pdfIn PDF document text
    • http://herve-coiffure.ci/files/fagexovapi.pdfIn PDF document text
    • https://velvetskin.pl/wp-content/plugins/super-forms/uploads/php/files/aeabef2e675ff0445a73ad01fed450fb/wolirudalodetepenuzepelo.pdfIn PDF document text
    • http://hi-reid-solutions.com/wp-content/plugins/super-forms/uploads/php/files/ed389375695d32c7eb705e094cd9faed/78121441822.pdfIn PDF document text
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/gnh1q71rhhpj0shtuvj0cpqsao/mojike.pdfIn PDF document text
    • http://cgl.lu/userfiles/files/zazujaxu.pdfIn PDF document text
    • http://dossalas.com/wp-content/plugins/super-forms/uploads/php/files/68e8da199b1423bed9adcbb7e72efbfe/pamiw.pdfIn PDF document text
    • http://cuacuondaiphuc.com/upload/files/kinedepupipikobujup.pdfIn PDF document text
    • https://edukiya.com/wp-content/plugins/super-forms/uploads/php/files/98e5dce532421c67304a00f47c0d2300/sijine.pdfIn PDF document text
    • https://bomberosdenavarra.com/userfiles_nexo/files/lowil.pdfIn PDF document text
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074030d8d910---73437179309.pdfPDF link annotation
    • https://michaels-limo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160942912c85b3---95358406346.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_off0000e369.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE369 19100 bytes
SHA-256: ac60969fb497e99eb158ea8c35cf984d0dbfc4afcdb7b8ca6de9c8fa48d0887e
font_01_sfnt_off00011442.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11442 10604 bytes
SHA-256: 19bc9fd4a19045da6f50aa95795016548d26fb1c0857bef3cfdd26d94f06461a
font_02_sfnt_off00012c72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C72 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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