Malicious PDF — malware analysis report

Static analysis result for SHA-256 03ffd9c12ffadc17…

MALICIOUS

PDF

85.4 KB Created: 2021-07-06 09:48:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 78c5f748e78065e34e7c0c6f08ebdb10 SHA-1: e68c72f62c32f384fce9c5b549668dce7450b609 SHA-256: 03ffd9c12ffadc17122dc7bb5015f2c4224d1d13a405dd78898e5643a681e390
156 Risk Score

Malware Insights

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

The PDF contains numerous links to compromised WordPress sites and disposable hosting, indicating a phishing or malware distribution lure. The ML classifier and ClamAV detection strongly suggest malicious intent. The file likely exploits a PDF vulnerability to redirect the user to one of the listed URLs, which may host further malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 6

  • 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.
  • 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://infrive.ru/uplcv?utm_term=point+blank+3 PDF link annotation
    • https://www.quatainvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b2bb2fe2173---modonivuresatagofuk.pdfIn PDF document text
    • http://vejwun.cz/images/9729477981.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160867ee238efa---86093044325.pdfIn PDF document text
    • http://growlink.biz/userfiles/file/kiloxo.pdfIn PDF document text
    • http://www.nationaalgolfcongres.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16074d093a36a5---ruxitagapaw.pdfIn PDF document text
    • http://pajurioverslas.lt/ckfinder/userfiles/files/bofupumuvatazaveterafew.pdfIn PDF document text
    • https://trsbarriersdirect.com/wp-content/plugins/super-forms/uploads/php/files/657idej7gmjqh4vr5ilo61ib7d/fepodegusilanum.pdfIn PDF document text
    • http://nirmalapublicschoolerumely.com/userfiles/file/kenidutufexajom.pdfIn PDF document text
    • https://creativesilhouettes.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160c84d5b5dd82---xokolepinubaleponul.pdfIn PDF document text
    • http://aylincinarli.com/fckfiles/file/42770544650.pdfIn PDF document text
    • https://www.couleurs-et-jardin.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1606c9541e710f---tewunosazesomamixigimafaf.pdfIn PDF document text
    • http://www.firengo.com/userfiles/files/betaminewadixasado.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16097dfeae4ca6---nobefedakanu.pdfIn PDF document text
    • http://ipvoicenj.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d040cd9fd1---18923166047.pdfIn PDF document text
    • https://bursaceviritercume.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aac1a8138b1---82995698407.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082dd6cb4678---gugagilizo.pdfIn PDF document text
    • https://www.mybizwebsites.com/wp-content/plugins/formcraft/file-upload/server/content/files/160890ff2352bd---17144607693.pdfIn PDF document text
    • https://semut73.com/contents//files/jiruwamejozade.pdfIn PDF document text
    • http://bjsprt.com/uploadfile/file///2021062716014146.pdfIn PDF document text
    • https://apskarota.org/userfiles/file/noronapesujekoga.pdfIn PDF document text
    • http://codemessaging.net/ckfinder/userfiles/files/63075496323.pdfIn PDF document text
    • https://www.growxponential.com/wp-content/plugins/super-forms/uploads/php/files/1ai3p3b4kmtqrv574hbk4l8cbu/sinagupodegimisuw.pdfIn PDF document text
    • http://xn--80akij1ajew.xn--p1ai/wp-content/plugins/formcraft/file-upload/server/content/files/1608b75d69545b---riluzonovetimugiwoz.pdfIn PDF document text
    • https://agribusiness.pk/wp-content/plugins/formcraft/file-upload/server/content/files/16086885a318a1---rugipazi.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_off0000eba7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBA7 17572 bytes
SHA-256: 22a0b364962244c269b16254c73eab0231112e5a6bf6316ab5f72ab36b21daa1
font_01_sfnt_off000119e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119E4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000131fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131FB 10108 bytes
SHA-256: 619fc35aa74dc8a1169ca79eb1b95898f0313773cebc15d78b3f933af37f869a

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