Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ee5f2bba32e43a9…

MALICIOUS

PDF

84.0 KB Created: 2021-09-03 09:27:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 4cd62cd4fcd37223d6a919dcf74906ca SHA-1: 09b3d2b54a9b6bd85204c2515d74323937d05710 SHA-256: 2ee5f2bba32e43a9a74118c18a46cf86e6b22e56a59a2839fe927866d318cd59
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The ML classifier and ClamAV detection strongly indicate this PDF is malicious. It contains numerous external links, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicates a tactic to obscure the true destination of the links. No scripts were extracted, but the presence of external links and the nature of the heuristics point towards a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://philabc.ru/uplcv?utm_term=dell+latitude+3400+btx+datasheet+pdf PDF link annotation
    • https://pragatitic.org/ckfinder/userfiles/files/82096371103.pdfIn PDF document text
    • http://babamoleskine.com/files/file/gonidizuzoneku.pdfIn PDF document text
    • http://viewcs.com/partner/upload/dextfile/59760187016.pdfIn PDF document text
    • http://contextuae.com/resimler/files/pebojetexesovojolukawuni.pdfIn PDF document text
    • https://sunnyvale.com/wysiwygfiles/file/witozexalazegufiwomifo.pdfIn PDF document text
    • https://www.hotel-palladium.gr/wp-content/plugins/super-forms/uploads/php/files/67jjithupbddc046kgllff37k6/21780543109.pdfIn PDF document text
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/1m5nopo020cunut996lj35m251/24445865390.pdfIn PDF document text
    • http://fzcce.com/aimgs/uload/files/vetive.pdfIn PDF document text
    • https://kocgrafikavukatwebsitesi.demowebsiteleri.com/upload/files/75531854305.pdfIn PDF document text
    • http://goozzl.com/userfiles/files/wafazuwufapefedotupojut.pdfIn PDF document text
    • http://allseasonsart.com/uploads/fck_uploads/file/78808703831.pdfIn PDF document text
    • http://www.scsi.coop/wp-content/plugins/super-forms/uploads/php/files/087e3a29c0c026e84b473ef216676399/69819649388.pdfIn PDF document text
    • https://www.andeanskyline.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094c8ab0992d---fejoxo.pdfIn PDF document text
    • https://ikima.fr/uploads/file/jiwaguvedon.pdfIn PDF document text
    • http://kagoshimakojintaxi.com/userfiles/file/77547174188.pdfIn PDF document text
    • https://totalmediasolutions.ae/ckfinder/userfiles/files/lodujujinifixogarepenodid.pdfIn PDF document text
    • http://fred-robin.com/ckfinder/userfiles/files/venesebanejomuwuvil.pdfIn PDF document text
    • http://www.megasaludips.com/wp-content/plugins/formcraft/file-upload/server/content/files/160982ecfc610d---nukuk.pdfIn PDF document text
    • https://eravukappalpalli.com/userfiles/file/gedesojamemodaliza.pdfIn PDF document text
    • http://onellenorzes.com/uploads/files/79969516300.pdfIn PDF document text
    • http://www.stadion-zarya.ru/ckfinder/userfiles/files/rezimifegafa.pdfIn PDF document text
    • http://ballmillfactory.com/d/files/kemajukojapepanepi.pdfIn PDF document text
    • http://www.akutrans.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d29a3ac874---duwilavopaletexor.pdfIn PDF document text
    • http://aostavet.it/userfiles/files/59459472570.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_off0000e04c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE04C 10984 bytes
SHA-256: 2c0f1c694df65e307f6b427cd5bd0f12dd3e04d06720cd9ed6f2960c29b9f43c
font_01_sfnt_off0000f9cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9CC 18400 bytes
SHA-256: 74d425b8a4be28abd7abd79dc31b2042fbafc40a63d6dce01602919f8c5f6a2a
font_02_sfnt_off00012a29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A29 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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