Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2f0fe4609440c48…

MALICIOUS

PDF

102.3 KB Created: 2021-06-12 16:58:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 40f73a997b9025e10243cbc7929f929f SHA-1: a8d39964ace17286c1fa44c316c6d41e1647f02f SHA-256: b2f0fe4609440c485d7d04a161a54da14d12c46c7a6370f81bdfa304a52b17eb
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains multiple links to compromised websites, disguised as a movie download. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded URLs suggest the document is part of a phishing campaign or a distribution point for further malware. No scripts were extracted, but the PDF structure itself is used to host and redirect to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://crysiq.ru/uplcv?utm_term=project+x+extended+cut+full+movie+online PDF link annotation
    • https://senzedigicraft.com/wp-content/plugins/super-forms/uploads/php/files/2b936cf4305625eb30784353cc46805f/mevoraxuwobikefivotave.pdfIn PDF document text
    • http://foire-fromages-et-vins.com/wp-content/plugins/formcraft/file-upload/server/content/files/160834e784393e---43474174381.pdfIn PDF document text
    • http://tjsijiqing.com/ckfinder/userfiles/files/2021/0604/d8b500a01e3e270339d48ed454b970e0.pdfIn PDF document text
    • https://sandalyecenneti.com/wp-content/plugins/super-forms/uploads/php/files/pldil96qagvcrm30ggtibsv3rn/muzewokojumo.pdfIn PDF document text
    • https://www.drserapkagan.com/wp-content/plugins/super-forms/uploads/php/files/5338mk9ge4e786up8951so4cmj/38913398198.pdfIn PDF document text
    • https://thriveelearning.com/wp-content/plugins/super-forms/uploads/php/files/5d28cff7559592c43436bde81c2459a3/nodanaduzat.pdfIn PDF document text
    • https://www.kcequipment.com.au/wp-content/plugins/super-forms/uploads/php/files/2fef6b7c94f0a93395afd31641d5ad2e/53301035545.pdfIn PDF document text
    • http://hopkinshigh1988.com/clients/75739/File/18578010308.pdfIn PDF document text
    • http://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc8af54d22---22216943301.pdfIn PDF document text
    • http://andreagarciam.com/wp-content/plugins/formcraft/file-upload/server/content/files/160be42db1262f---63715864518.pdfIn PDF document text
    • https://nuregio.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ae7f55852d7---42871870700.pdfIn PDF document text
    • https://c4ir.ae/wp-content/plugins/super-forms/uploads/php/files/0a1goibjtt59d2ajodaq71qg81/naridigipiduzetof.pdfIn PDF document text
    • https://lawina-radom.pl/files/file/pakogujibefoko.pdfIn PDF document text
    • http://saludocupacionalpso.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/16094ba7fb5008---63386175146.pdfIn PDF document text
    • https://www.peeryhotel.com/wp-content/plugins/super-forms/uploads/php/files/5149429e9732c0957bd5f330b746b01d/finexapozaj.pdfIn PDF document text
    • http://informerfitness.com/wp-content/plugins/super-forms/uploads/php/files/d1c9e8bfed8ed51d59361b549adf0cca/xalubev.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00015238.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15238 4984 bytes
SHA-256: 0b655081b4127eb09385e00db0fb3201d9d6b6cf7644f3dc370936cd3491fde8
font_01_sfnt_off00016327.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16327 12112 bytes
SHA-256: a7d4f9df91f847999875cc065df7a5ea3720ae330c64a826bbcbf3607d2b39f3