Malicious PDF — malware analysis report

Static analysis result for SHA-256 212503d14e405ce7…

MALICIOUS

PDF

83.2 KB Created: 2021-09-04 16:19:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 0cb5b4066cf04f9030565dc5e88aa5f6 SHA-1: ee9bffa84bd4592462b5065fea5f5ed36608a536 SHA-256: 212503d14e405ce7bbc65fb2bcb7f5d43b2fb560896352368b0ed1768794181c
176 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The file functions as a link farm, with numerous URLs pointing to various websites, some of which are hosted on compromised CMS platforms. This suggests the document is likely used for phishing or to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://huntic.ru/uplcv?utm_term=cisco+ie-3000-8tc+pdf PDF link annotation
    • http://hasyo.net/files/file/2039749366.pdfIn PDF document text
    • https://micast.de/wp-content/plugins/super-forms/uploads/php/files/n8f10rmlggrcb66s27qtocc53j/63282390464.pdfIn PDF document text
    • https://mandalaconfeccao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608099095f047---wetivi.pdfIn PDF document text
    • http://hesexpo.com/img/editor/image/file/gutetilerak.pdfIn PDF document text
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/9mts4sqpi99459uv3g7nnkq976/4716983590.pdfIn PDF document text
    • http://tokyoracing.hu/userfiles/file/wujezefijebamodarilipoxu.pdfIn PDF document text
    • https://people11people.com/uploads/File/15777068273.pdfIn PDF document text
    • https://abicecream.ru/ckfinder/userfiles/files/21320489869.pdfIn PDF document text
    • http://www.sudaff.com/pics/file/27710574417.pdfIn PDF document text
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/06ef49a909a69dcd83e36ae0378b112d/203304613.pdfIn PDF document text
    • https://www.pfgpartners.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16087bbf2ac682---tefinuberofawusoni.pdfIn PDF document text
    • https://www.sahabatkeluargahomecare.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611a6df3d13b2---85349289551.pdfIn PDF document text
    • http://www.auditsi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160860384b3d57---xiwojikiviseni.pdfIn PDF document text
    • https://www.chauffeur-prive-nice.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160ce84b6b82b1---84017699696.pdfIn PDF document text
    • http://fmafirm.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/57930276171.pdfIn PDF document text
    • http://hsi-international.com/ckfinder/userfiles/files/wuvoxusoka.pdfIn PDF document text
    • http://daegyung.kr/userfiles/file/20210706214949.pdfIn PDF document text
    • http://kielcenoca.pl/files/file/43540013125.pdfIn PDF document text
    • http://www.bewegeninarnhem.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608cf9f5b7984---76551212538.pdfIn PDF document text
    • http://booklandbooks.com/userfiles/file/79660960865.pdfIn PDF document text
    • https://noukos.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160d200de1ac7d---foluwibewoluso.pdfIn PDF document text
    • https://shayangroup.net/wp-content/plugins/super-forms/uploads/php/files/b2228cf3e9b226bd9af10c49ca41cab8/46514252040.pdfIn PDF document text
    • https://vico-domrep.com/ckfinder/userfiles/files/relexesokibi.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_off0000db28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB28 10768 bytes
SHA-256: bee5f367afdb4ad6ceddf183a3d7c5b6c6aded10dbfec8fd4c498fea7f197cb5
font_01_sfnt_off0000f42b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF42B 19348 bytes
SHA-256: 678bf1c49092d6a95ec18d7111e087d491e8d30e3d3a73d638b080fcddc1d402
font_02_sfnt_off00012731.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12731 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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