Malicious PDF — malware analysis report

Static analysis result for SHA-256 155ad9cbd4c922b0…

MALICIOUS

PDF

87.4 KB Created: 2021-08-09 12:58:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: c111e4abc29b77ba8dc24197e099dca6 SHA-1: 9f3acd263f9942c33778f8c194731f97f4b39c51 SHA-256: 155ad9cbd4c922b08f65d39e673ca88aee7b8b6c453687545c8873fffcf8a5d9
164 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript and numerous external URIs, many of which point to compromised WordPress sites or disposable hosting, forming a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution by redirecting users to malicious sites. The embedded JavaScript is likely used to facilitate these redirects or exploit vulnerabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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=product+key+windows+7+professional+64+bit+gratis PDF link annotation
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/16094200384ce9---megekutujebenir.pdfIn PDF document text
    • https://agribusiness.pk/wp-content/plugins/formcraft/file-upload/server/content/files/16079dfd268d9e---rujenib.pdfIn PDF document text
    • https://inijariku.com/ckfinder/userfiles/files/87015661081.pdfIn PDF document text
    • https://deltagroup.bg/uploads/file/5821063188.pdfIn PDF document text
    • https://inncredel.com/uploads/xotor.pdfIn PDF document text
    • http://ventiliatoriai.lt/js/ckfinder/userfiles/files/69229040717.pdfIn PDF document text
    • http://altinay-law.com/images/file/73955261613.pdfIn PDF document text
    • https://clickkedai.com/userfiles/file/39166909824.pdfIn PDF document text
    • https://cullinanconstruction.com/wp-content/plugins/super-forms/uploads/php/files/ta0v2dr1vghooq8rlfvi1ed8rq/16589689231.pdfIn PDF document text
    • http://randygordonlawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/24096556857.pdfIn PDF document text
    • https://journeypeople.cc/wp-content/plugins/super-forms/uploads/php/files/fef9708c7ae49fadd8ae5f4f3e4c8ed7/zikokabarasixerupatuxuz.pdfIn PDF document text
    • http://dges.in/userfiles/file/92572913672.pdfIn PDF document text
    • https://marblo.ph/app/webroot/img/files/vuximugesekukarap.pdfIn PDF document text
    • https://lesura.net/userfiles/file/97750198482.pdfIn PDF document text
    • https://sandalyecenneti.com/wp-content/plugins/super-forms/uploads/php/files/oosuhlopkhn28os2j4i7o1057q/22202329257.pdfIn PDF document text
    • http://www.sbawerribee.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16081787732994---30238450730.pdfIn PDF document text
    • http://alarcon-v.com/editor_upload_image/file/nuzoladamelodosemofid.pdfIn PDF document text
    • http://bilagroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/160943d4224739---18401247367.pdfIn PDF document text
    • http://thefutureofgolf.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16097c20f1a3e2---kapepanotipom.pdfIn PDF document text
    • http://zit-tech.com/userfiles/files/majuravojafarixazin.pdfIn PDF document text
    • http://ipjanah.ir/wp-content/plugins/super-forms/uploads/php/files/3qlndost88unevffkn66c4t9n9/68480714319.pdfIn PDF document text
    • https://daismene.it/file/kokujepugobome.pdfIn PDF document text
    • https://j26clean.com/upload/files/dowoxebodorepitama.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_off0000eebb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEBB 17276 bytes
SHA-256: f4b01229732658e7a86d16e89fa63dff8b1d4fa2bc2fa29d12a353006863b1ef
font_01_sfnt_off00011c19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C19 11624 bytes
SHA-256: b4d3b61ee102845abfd13b39e4a85c3ad3294b1a259a47357e70e91d85406fb0
font_02_sfnt_off000137b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x137B0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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