Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c2c0dc615eaf3c4…

MALICIOUS

PDF

87.1 KB Created: 2021-09-18 05:44:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: e299d612200ee2a1c2be8764515387dc SHA-1: 2699d2f4805f527a965ae52ef5523367d99145d7 SHA-256: 4c2c0dc615eaf3c4db641c3d9ad8b191d4ab79a291c33dda5f3b0c6d34407c2f
156 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, indicating a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://drafthe.ru/uplcv?utm_term=what+is+the+best+movie+app+for+firestick PDF link annotation
    • https://wheelmartthailand.com/image/upload/File/lalezolovibakojakik.pdfIn PDF document text
    • http://dkstores.gr/userfiles/file/xewimiguramesolagije.pdfIn PDF document text
    • http://animationcoach.com/userfiles/file/relivatovi.pdfIn PDF document text
    • http://cgpreceptor.com/ckfinder/userfiles/files/taxagojefikokufogupomewip.pdfIn PDF document text
    • https://sumangold.net.vn/wp-content/plugins/super-forms/uploads/php/files/2vakamut70joqgh63ldftm6arb/29766689387.pdfIn PDF document text
    • http://gyermekhaz.hu/Content/site_images/files/sewugupajo.pdfIn PDF document text
    • http://cgpreceptor.com/ckfinder/userfiles/files/zulugunozo.pdfIn PDF document text
    • http://www.39koratmachinery.com/file_upload/files/28135308116.pdfIn PDF document text
    • http://usairsprings.com/userfiles/file/18413859180.pdfIn PDF document text
    • https://www.zaantraining.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16134a968e32b6---16167192929.pdfIn PDF document text
    • http://motecx.com/images/file/ladefisisod.pdfIn PDF document text
    • http://langfordfinancialservices.com/userfiles/files/dibinedawadeb.pdfIn PDF document text
    • http://hertzlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/borugiten.pdfIn PDF document text
    • http://studiogiamberardino.it/userfiles/files/85988406825.pdfIn PDF document text
    • https://lalicorne-hotel.com/userfiles/file/gunefen.pdfIn PDF document text
    • http://nawoo.net/userData/board/file/65118523624.pdfIn PDF document text
    • http://www.anclupnapoli.it/userfiles/file/91987707904.pdfIn PDF document text
    • https://agribusiness.pk/wp-content/plugins/formcraft/file-upload/server/content/files/16138734a9844e---degugupepojajosulo.pdfIn PDF document text
    • http://ph-easycome.com/userfiles/file/firoxupiwur.pdfIn PDF document text
    • http://123podkrovie.sk/editor_uploads/files/28907896968.pdfIn PDF document text
    • http://hflbdq.com/uploads/file/151105201792.pdfIn PDF document text
    • http://herbwaterthailand.com/userfiles/files/voxoxuxozeg.pdfIn PDF document text
    • http://zs-oilfieldequip.ru/d/files/28496225673.pdfIn PDF document text
    • http://urdu-hadith.com/survey/userfiles/files/xojulojipaduka.pdfIn PDF document text
    • http://hillsdalehorseboarding.com/ckfinder/userfiles/files/fipikevexego.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_off0000eb26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB26 19020 bytes
SHA-256: b21652f0d02791ebdbc670ded4c528ca3622db8d9d60d6acacc65d6bd69773c7
font_01_sfnt_off00011d12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D12 10888 bytes
SHA-256: 5e954796ee53c0674b5cb1fe435166a0ac3a25772e307ce567d6d4c1c486babb
font_02_sfnt_off0001361f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1361F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1