Malicious PDF — malware analysis report

Static analysis result for SHA-256 38741960d15af2b2…

MALICIOUS

PDF

100.7 KB Created: 2021-06-30 22:23:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 348d2db6f0fbda9d60ab5a65acc03e6a SHA-1: 8f55ef950c69041950ed02d101edf286a8fe1d2f SHA-256: 38741960d15af2b28cc2a586c75362108d7c7909653907c9dc5a721dd895a721
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The file functions as a link farm, containing numerous URLs pointing to compromised WordPress upload storage and disposable hosting, likely intended to redirect users to phishing sites or download further malware. The presence of multiple external URIs and the 'link farm' heuristic strongly suggest this document is part of a broader distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9685

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 http://portalcom-b2b.es/img/user///file/_0947223001622320979.pdf In PDF document text
    • https://www.chortho.co.uk/wp-content/plugins/super-forms/uploads/php/files/ad6hr16ao0gbqssvr08n7reoic/94977255399.pdfIn PDF document text
    • https://quickonboarding.com/wp-content/plugins/super-forms/uploads/php/files/95ea19920fe89790f6a6da1c8f01500f/rezuduzilixizoxabatokon.pdfIn PDF document text
    • https://campermagazine.tv/public/file/65861904207.pdfIn PDF document text
    • http://ya-ke.cn/admin/upload/849679582.pdfIn PDF document text
    • http://discarga.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b364f71a216---mepazujixibona.pdfIn PDF document text
    • https://ebooksweb.net/files/file/19531588825.pdfIn PDF document text
    • https://teenvolunteerhouston.com/wp-content/plugins/super-forms/uploads/php/files/11928c4891bffd72e4183c24cc24b516/xototelawalutigu.pdfIn PDF document text
    • http://fashioncenterpoint.com/wp-content/plugins/super-forms/uploads/php/files/738a44cc2586f177a4de40461a5521c3/muputowikaz.pdfIn PDF document text
    • http://keifo.ru/ckfinder/userfiles/files/sezarezunegoxijixononabu.pdfIn PDF document text
    • http://mgmkt.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16098770131837---konete.pdfIn PDF document text
    • http://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096a09eca039---binegisusono.pdfIn PDF document text
    • http://adanateknikservis.web.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16076899e96d92---jajurujevofotavupo.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090d19809cd0---80311461149.pdfIn PDF document text
    • http://www.unidacardoso.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609cbe4ef3a34---tidotojegurexelojon.pdfIn PDF document text
    • https://turkihale.com/userfiles/file/74352108393.pdfIn PDF document text
    • http://www.adanakursmerkezi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d048965cd4---jaluligexikok.pdfIn PDF document text
    • https://aslimitada.com/userfiles/file/mesulekivamapezezubizap.pdfIn PDF document text
    • https://beautyreviveshop.com/newerac2c/userfiles/file/98905356914.pdfIn PDF document text
    • https://performanceltg.com/wp-content/plugins/super-forms/uploads/php/files/f5513169a8a4a61aa3b39682a59d1416/vovigosafuwo.pdfIn PDF document text
    • https://insights3.com/wp-content/plugins/super-forms/uploads/php/files/ffb7d1f39e683a786ab15512584778af/daguvazoguvesewofaxemixa.pdfIn PDF document text
    • https://advantagelic.com/singhania/downloads/file/lasitufujodigirubabav.pdfIn PDF document text
    • https://movesforfree.com/wp-content/plugins/super-forms/uploads/php/files/1om9ooomd3hq1sapa65oiqq9c5/witigobuxaseforokuj.pdfIn PDF document text
    • http://www.saraviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fb37bb601f---24042842813.pdfIn PDF document text
    • https://argentinaproduct.com/ckfinder/userfiles/files/52450637913.pdfIn PDF document text
    • http://teaandtiarasottawa.org/clients/e/e8/e8f54e69a7463df9fd0adff13cd8e90f/File/92461483948.pdfIn PDF document text
    • http://triatlonbizuterie.cz/sites/default/files/file/wuvuvunut.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=avengers+endgame+download+for+androidPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010789.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10789 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011f9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F9A 16092 bytes
SHA-256: 9d5144547e0b729630886a3ad3ce48e7da84b0115899dd9c2390406af6f0fecd
font_02_sfnt_off000134db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x134DB 20916 bytes
SHA-256: 27bceb1c28c723656ebe6e7c884e8513b367d37dd1c7e25ef3e700a08f7a6722
font_03_sfnt_off00016a39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16A39 10732 bytes
SHA-256: 5d0f68c87c25a57de280106fa09ac11242d9305ced82efd80a645a8ec077dc40

Open this report in the interactive analyzer, or submit your own file for analysis.