Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ea382d90104cd86…

MALICIOUS

PDF

88.5 KB Created: 2021-07-07 09:59:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 667d845a7dc1bbc0ec550d2b4f7be2b6 SHA-1: d12e5a245b8039864ee0f66a5416c99baa6cbf8d SHA-256: 2ea382d90104cd86d0d06bcaca89197d4373b252c07a54a7ec1e18b80938dc8d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm, with many URLs pointing to potentially compromised WordPress sites or disposable domains. The PDF structure and numerous external links suggest it's designed to redirect users to malicious content, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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 http://elijasprojekts.lv/files/file/42577231619.pdf In PDF document text
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/mhfko0ddmekbc1ech43a55l7g3/rosukonowirezosozotajezi.pdfIn PDF document text
    • http://mgmkt.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606c7341b6a41---zetibopuragosela.pdfIn PDF document text
    • https://soudurelauziere.ca/upload/editor/file/60727849103.pdfIn PDF document text
    • https://harpethvalleypto.org/wp-content/plugins/super-forms/uploads/php/files/35bd777a296f3b753f9eddfb492a8f62/zinusomuxuvefaripunu.pdfIn PDF document text
    • https://mosoptagro.ru/wp-content/plugins/super-forms/uploads/php/files/37d9905e8333d9e3ac049325499f0a34/25934880554.pdfIn PDF document text
    • http://greece-ex.com/images/blog//file/pixosanulagegewofufifobaf.pdfIn PDF document text
    • http://sahamit.net/userfiles/file/wigemipopanitoruwimolasa.pdfIn PDF document text
    • https://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070c37b6e6d5---lawirijopunutuvemajob.pdfIn PDF document text
    • http://universalestetic.com/userfiles/file/sepezewuw.pdfIn PDF document text
    • http://fortlauderdalelimorental.net/wp-content/plugins/formcraft/file-upload/server/content/files/160b1299acfb84---fujevugemofepig.pdfIn PDF document text
    • https://datatech-int.com/userfiles/file/fivarutuzamoloxa.pdfIn PDF document text
    • http://www.esthemed.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1608ded531e0dd---38927860521.pdfIn PDF document text
    • https://www.gsccn.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608dd7a876fa1---53399307132.pdfIn PDF document text
    • https://ecoinkworld.com/wp-content/plugins/super-forms/uploads/php/files/e86b9d12d8e64ac19cfacd7d9cac34ae/72348601305.pdfIn PDF document text
    • http://philippinesroadshow.com/wp-content/plugins/super-forms/uploads/php/files/43379960a5da6b36fddbd6c27bb4ed1b/sasej.pdfIn PDF document text
    • http://www.lentilles-progressives.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160dd6220ec067---89582314511.pdfIn PDF document text
    • http://reutlinger.pl/userfiles/file/demejedukoxasowuworur.pdfIn PDF document text
    • http://luckdidea.com/ckfinder/images_store/files/68229721624.pdfIn PDF document text
    • https://loskutova.site/wp-content/plugins/super-forms/uploads/php/files/2b6324ef4ccd2d603a0aeadaa46ce3d5/53154173041.pdfIn PDF document text
    • https://www.mercedesbenzofaustinservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ece6f16615---16059355672.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=if+you+are+dehydratedPDF 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_off0000f87c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF87C 16908 bytes
SHA-256: f4195ea32cb02e1a33f4c71802b58e28b0e4dd746dd1f56a218bf8647ad21257
font_01_sfnt_off00012481.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12481 10204 bytes
SHA-256: d8135ae95c1a2de3e07b0de0b6e2fbda99ce3621f1905a6a1f2a5e2d45e31f55
font_02_sfnt_off00013b8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B8C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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