Malicious PDF — malware analysis report

Static analysis result for SHA-256 59175535558d246b…

MALICIOUS

PDF

96.2 KB Created: 2021-09-05 21:59:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 7c9505d6fd9a8b81f568a286d0dbac04 SHA-1: db6d54d9d0b5468116ec2040fac91cb5cbe79db4 SHA-256: 59175535558d246be110f06dea9aa02dd545fe05a33f64d96741645b6a4c9c00
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware delivery. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with techniques used to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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://garglob.ru/uplcv?utm_term=xiaomi+mi+band+4+user+manual+pdf PDF link annotation
    • http://blessingsngo.in/userfiles/files/memugefurejuro.pdfIn PDF document text
    • http://gioiacompany.net/images/upload/file/sibamutofola.pdfIn PDF document text
    • https://gulertrafik.com/wp-content/plugins/super-forms/uploads/php/files/b8rbom8g3mvjcsmpe21r4040ji/57036085752.pdfIn PDF document text
    • https://ajansnigde.com/resimler/files/pifizesepujevowajegodowe.pdfIn PDF document text
    • http://julieesteban.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083d401b485d---73126706496.pdfIn PDF document text
    • https://www.kadeavenue.com/wp-content/plugins/super-forms/uploads/php/files/91c5775a5e87525e6e2582cae8271ec7/nenikifije.pdfIn PDF document text
    • http://terapie-psi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1607c7305c6c10---13525206481.pdfIn PDF document text
    • http://emotionpicturesfestival.gr/userfiles/file/pugeguso.pdfIn PDF document text
    • http://kibbkw.com/uploads/file/segagomevezenefi.pdfIn PDF document text
    • http://www.britocunhaadvocacia.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/1607522100f22c---88684892227.pdfIn PDF document text
    • https://lakecountyoralsurgery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bf9919c8b3d---jogalemigikivisafiri.pdfIn PDF document text
    • https://www.kbstephens.com/wp-content/plugins/super-forms/uploads/php/files/16c5c5a2569691621b90a8b8739bb73b/37025239178.pdfIn PDF document text
    • http://cappellastudio.it/userfiles/files/xonutanu.pdfIn PDF document text
    • http://lbhs1965.com/clients/6/6b/6bdd8f708684a1f547efbf97e1630fe5/File/musizinarijarava.pdfIn PDF document text
    • http://classicalgardenornaments.com/uplds/file/63227770584.pdfIn PDF document text
    • http://bike-aholic.com/UserFiles/file/tatiluwubikerujuliz.pdfIn PDF document text
    • http://circolonauticofavignana.it/userfiles/files/40296699908.pdfIn PDF document text
    • http://scales-center.com/shop/fck_file/file/85814427376.pdfIn PDF document text
    • https://confeccionesruiz.cl/UserFiles/File/nomaregogejodakijufavo.pdfIn PDF document text
    • http://pkpneu.cz/userfiles/file/refujopotanike.pdfIn PDF document text
    • https://lapakunited.com/contents//files/93245843370.pdfIn PDF document text
    • https://endoaccessories.com/wp-content/plugins/super-forms/uploads/php/files/vsjucegd3oq4evt04fs9qr3ebn/wekojubosef.pdfIn PDF document text
    • http://bafiti.com/sklep/userfiles/file/96222433929.pdfIn PDF document text
    • http://wksystems.net/HotelEstimator/userfiles/file/bolugadovapenogarepo.pdfIn PDF document text
    • https://ntpuvoice.com/ckfinder/userfiles/files/57154028944.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_off00011047.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11047 18992 bytes
SHA-256: 4ed32766bae10dfbe5ed0146502228f8b64ab3a519bc23c4b69f11b4919b615f
font_01_sfnt_off000141e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x141E2 10888 bytes
SHA-256: 50ff9c93c443ee2f9f5a54630ef5bcf5bff432629fbc08d6c825388295db4505
font_02_sfnt_off00015ad5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15AD5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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