Malicious PDF — malware analysis report

Static analysis result for SHA-256 b84f09110462e42c…

MALICIOUS

PDF

89.7 KB Created: 2021-06-25 21:25:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: dda50688534e52c85da9acf5c2b3eb6d SHA-1: f0b451cd09ce7e7b6577291b6f72e9aad7c860c3 SHA-256: b84f09110462e42cb0a63ab363c40537c1b53c1e95195b9df6ad4030c0413145
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains a large number of external URIs and link farms pointing to various domains, many of which appear to be compromised WordPress sites. The primary purpose seems to be redirecting users to potentially malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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://infrive.ru/uplcv?utm_term=best+chest+supersets PDF link annotation
    • https://andrejc.si/files/file/34392741419.pdfIn PDF document text
    • https://iqmuseum.mn/uploads/files/xasovinunav.pdfIn PDF document text
    • https://davebakeragency.com/wp-content/plugins/super-forms/uploads/php/files/6ac519e538086d37173c1a54870321a7/jobepibifo.pdfIn PDF document text
    • https://nutricionintravenosa.com/wp-content/plugins/super-forms/uploads/php/files/85b7f7b76c53a600e452783a7a2d95b3/vewefakugesusimax.pdfIn PDF document text
    • http://www.vitrierbxl.be/wp-content/plugins/formcraft/file-upload/server/content/files/1608193e43bb69---95569230839.pdfIn PDF document text
    • http://geteffective.biz/uploadfiles/file/36943453920.pdfIn PDF document text
    • https://ipcare.nl/wp-content/plugins/super-forms/uploads/php/files/6h818ab8bdmocgtqeolht3a58o/xiguxukowefa.pdfIn PDF document text
    • https://aradovan.com/userfiles/file/katimovo.pdfIn PDF document text
    • http://phantasos.org/userfiles/file/4736069630.pdfIn PDF document text
    • https://brunoamaranti.it/wp-content/plugins/super-forms/uploads/php/files/maipsmoa3j8ir5k266m8bias25/21177248428.pdfIn PDF document text
    • https://simplehome.ro/ckfinder/userfiles/files/zuxumi.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073f81f11b8c---87974347694.pdfIn PDF document text
    • http://witnesstherealist.com/wp-content/plugins/super-forms/uploads/php/files/abf89586a08331b35eb02cb262a28b0a/fofowevi.pdfIn PDF document text
    • http://cpils.com/userfiles/file/80231741799.pdfIn PDF document text
    • https://ancoraeducacion.com/images/85477957857.pdfIn PDF document text
    • http://aeronautike.com/userfiles/file/kifuwibujufebuxixegojiju.pdfIn PDF document text
    • https://diversifiedhumansolutions.com/wp-content/plugins/super-forms/uploads/php/files/8c2eac72e0c239eb6527cb27edcf8865/wusigodujawat.pdfIn PDF document text
    • https://takiminsahada.com/wp-content/plugins/super-forms/uploads/php/files/m7nsnl5n839ittvioa1lv5g52k/2762335388.pdfIn PDF document text
    • https://useoneconvo.com/wp-content/plugins/super-forms/uploads/php/files/8085818f69adae703610f5f48cf092be/50843952728.pdfIn PDF document text
    • http://sciattella.net/images/file/55212410490.pdfIn PDF document text
    • http://prtourusa.com/FileData/ckfinder/files/20210617_09DC334440585F21.pdfIn PDF document text
    • https://www.grecosalesinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/160894106694e2---73657065509.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

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_off0000fa6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA6C 10100 bytes
SHA-256: 107083e6e625774b4a76982d6536cb7498f55f9e83a217fa970ca21c3a78f790
font_01_sfnt_off0001111f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1111F 17760 bytes
SHA-256: ec419d0365046713cba99e2d25e4407d5b4599a7a5020433ab1ad19698675740
font_02_sfnt_off00014049.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14049 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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