Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c6da838135b72b1…

MALICIOUS

PDF

106.3 KB Created: 2021-06-26 00:14:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 9dfae47be9004196745645df74689ad5 SHA-1: e0d36b9da977d04c331a2bad0b94e8ed786f1ede SHA-256: 0c6da838135b72b1ccecd64bf7f1ad1e7424e3b901985df12a4859462641637e
156 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing or trojan variant. The heuristics indicate it functions as a link farm, directing users to multiple compromised websites and potentially disposable hosting. The embedded URLs suggest an attempt to distribute further malicious content or conduct phishing operations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

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://transport-vehicules.fr/userfiles/file/fexilipepopezofi.pdf In PDF document text
    • http://www.guaitoli.eng.br/wp-content/plugins/formcraft/file-upload/server/content/files/160acdf9731f24---14471842489.pdfIn PDF document text
    • http://www.maoles.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b0407fd6dd4---desubawuwujir.pdfIn PDF document text
    • https://socialacademy.gr/wp-content/plugins/super-forms/uploads/php/files/2c31a57bea8a0457dde161a3a7d5f0af/12402353553.pdfIn PDF document text
    • http://heninrealty.com/userfiles/files/mekigemigexidari.pdfIn PDF document text
    • https://ecef-groupe.com/wp-content/plugins/super-forms/uploads/php/files/9gkq75b6i3srugivni4kjj5vm2/panipukogidudepifisepib.pdfIn PDF document text
    • http://7tec.ru/userfiles/files/64591786074.pdfIn PDF document text
    • https://hartwellcook.com/wp-content/plugins/super-forms/uploads/php/files/85eb94cd11d8cd4510e61115d6667243/30467471647.pdfIn PDF document text
    • http://carneslaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/88830622966.pdfIn PDF document text
    • http://venusland.vn/app/webroot/img/files/vatekikowobadimix.pdfIn PDF document text
    • http://talleresjpg.es/img/file/linevikeraz.pdfIn PDF document text
    • https://www.mercedesbenzofaustinservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a183d2404c7---pumebowasewewotigiref.pdfIn PDF document text
    • http://yuanjen.com/ckfinder/userfiles/files/zazik.pdfIn PDF document text
    • http://traiteur-ribot.fr/userfiles/file/goxelidozujukufefa.pdfIn PDF document text
    • http://conwaychristian.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608251251072f---bomuzoginowikewamidid.pdfIn PDF document text
    • http://technocom.pl/editor/file/dodig.pdfIn PDF document text
    • https://lesartsdansmonjardin.com/userfiles/file/20210614012305.pdfIn PDF document text
    • https://goactive.hu/wp-content/plugins/super-forms/uploads/php/files/735a80ae4c1be54042ed7de2a1c5f5ea/41702291620.pdfIn PDF document text
    • http://www.lightingandhvacexpo.com/wp-content/plugins/super-forms/uploads/php/files/cd332b1420da0ca4d537959276dddb4f/20899239705.pdfIn PDF document text
    • http://parkwestresidences.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b406569e39---jugovalevawupu.pdfIn PDF document text
    • http://tourhong.com/FileData/ckfinder/files/20210626_3BC61874FA4D6E17.pdfIn PDF document text
    • https://www.frankreich-ferien.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1607031749191a---nepisenubom.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=peter+and+wendy+onlinePDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001409e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1409E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000158b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x158B5 10276 bytes
SHA-256: 7e79dff109ec6c651b651f566865ff65b9d922883e6c178b3e8b3a0acdae2907
font_02_sfnt_off00016ff6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16FF6 16984 bytes
SHA-256: c74a8445a27bd6516bb670409f2be6bb692c89e5d7e9083b1ae3d519d40019e7

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