Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa68d7bd570a2800…

MALICIOUS

PDF

89.8 KB Created: 2021-07-04 03:57:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 5c69ec31ef95f7aae2f12cb8f769065d SHA-1: 203c3b2abe392362ed4e93f664b25de36b18cbac SHA-256: fa68d7bd570a28009d608a721fc03a9b293218b04f57f2960d6fb6e4b8f4a82b
156 Risk Score

Malware Insights

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

The PDF was flagged by multiple heuristics as containing a link farm hosted on compromised CMS upload directories, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection further support its malicious nature. While no scripts were extracted, the presence of numerous URLs pointing to potentially compromised sites suggests the primary attack vector is directing users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://www.mclarenpress.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a676ba967e2---piladibegoxuzov.pdf In PDF document text
    • https://decoveinvestment.com/userfiles/file/somekinofadedizataki.pdfIn PDF document text
    • http://chinoboxingclub.com/clients/36032/File/negiwixumukedujunogafid.pdfIn PDF document text
    • http://antwerp-rentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085c3057e44d---37723737291.pdfIn PDF document text
    • http://edwardnugent.com/userfiles/files/ruretajezigajuku.pdfIn PDF document text
    • https://murten-hotels.ch/userfiles/files/retorijimiravi.pdfIn PDF document text
    • https://mauspro.net/upload/files/topiliwuvasib.pdfIn PDF document text
    • https://mldom.xyz/web/img/podborky/files/84770146282.pdfIn PDF document text
    • https://www.web2business.pt/wp-content/plugins/formcraft/file-upload/server/content/files/160c8f4ca004f1---vebesogetup.pdfIn PDF document text
    • http://vogiantinhmach.com/media/ftp/file/83693011278.pdfIn PDF document text
    • http://elenasteele.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c37b815afc5---11839003075.pdfIn PDF document text
    • https://www.democratum.com/wp-content/plugins/super-forms/uploads/php/files/d998959e8633c9803435f4de69e0e244/10293836951.pdfIn PDF document text
    • http://famcareconnect.org/wp-content/plugins/formcraft/file-upload/server/content/files/16090d779cf919---70847627037.pdfIn PDF document text
    • https://greshamgilessalon.com/wp-content/plugins/super-forms/uploads/php/files/a1bce779b944c939bd789a3cc4d2a161/pijox.pdfIn PDF document text
    • https://theemperorsoldclothes.co.uk/wp-content/plugins/super-forms/uploads/php/files/7jnoni4pq7ggsboi5g73v2qm5i/sovivovezorevujar.pdfIn PDF document text
    • http://bubblesoflove.net/wp-content/plugins/formcraft/file-upload/server/content/files/160bad46f46326---6276890847.pdfIn PDF document text
    • https://www.lightingsolutionsal.com/wp-content/plugins/super-forms/uploads/php/files/8744e1530d9fd347e4b44b0d3db3897b/72111928753.pdfIn PDF document text
    • https://intelean.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a06ce0f3258---72887947763.pdfIn PDF document text
    • http://ipjanah.ir/wp-content/plugins/super-forms/uploads/php/files/0e548nbsst2hhnv657kc4d7gb4/38096114370.pdfIn PDF document text
    • https://www.areatransfers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3f2e7861ed---79621295112.pdfIn PDF document text
    • http://getawaynewzealand.co.nz/wp-content/plugins/formcraft/file-upload/server/content/files/160a968768054f---42844157971.pdfIn PDF document text
    • https://edoxmarketing.com/wp-content/plugins/super-forms/uploads/php/files/i1jv9qn6gdn2mbb3mshl69kdh9/judalenalubalowupevam.pdfIn PDF document text
    • https://aadhaarretail.com/administrator/imagetemp/file/zapazafazeduvonub.pdfIn PDF document text
    • http://bertrandetgastineaudesigners.com/userfiles/file/25098545682.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=adjectives+about+sunPDF 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_off0000f29c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF29C 10636 bytes
SHA-256: dd301df86b746d6b6f47692222efd809900b70eb04e836edee132e0085d53191
font_01_sfnt_off00010b16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B16 21744 bytes
SHA-256: ea1471b1a3805150a42dedeb8fdb73d2691cd3cded173ea7baf9de416c69cb93
font_02_sfnt_off0001420b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1420B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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