Malicious PDF — malware analysis report

Static analysis result for SHA-256 dadf9b6e76ba9220…

MALICIOUS

PDF

71.2 KB Created: 2021-09-29 02:50:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 1fc5201d5f11cde66d772b5dbfef4688 SHA-1: 6651dcc6f66d5ddf41de0a9fcd4fcabbcd044d88 SHA-256: dadf9b6e76ba922003dc25f69d36c58b702578b230b53340046e8cd53bb5408d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to compromised WordPress uploads, suggesting a link farm designed to redirect users. One prominent URL, 'https://pixomot.ru/uplcv?utm_term=transfer+files+between+your+computer+%26+android+device', indicates a lure related to file transfer services. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9837

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://pixomot.ru/uplcv?utm_term=transfer+files+between+your+computer+%26+android+device PDF link annotation
    • http://cageart.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16138f8aba5ecf---40663742161.pdfIn PDF document text
    • http://torgoborud.org/images/file/24630407244.pdfIn PDF document text
    • https://gmnavarra.es/ckeditor/files/lipitoji.pdfIn PDF document text
    • http://sethhukumchandschool.com/userfiles/file/tulizodebidobilewanegesef.pdfIn PDF document text
    • https://smoothnomad.com/wp-content/plugins/super-forms/uploads/php/files/7q2odit5gaugho0qedkhbt2jsh/ritubelig.pdfIn PDF document text
    • https://planet-pvc.com/upload/files/videnidodanasobip.pdfIn PDF document text
    • http://embody.box8websites.com/ckfinder/userfiles/files/8112912640.pdfIn PDF document text
    • http://jl-vacuum.com/upload/files/sejedufiket.pdfIn PDF document text
    • https://pacpartner.net/images_client/imagesfile/71048297899.pdfIn PDF document text
    • https://sapsda.com/SapmaUserfiles/file/zilezigesarepufos.pdfIn PDF document text
    • http://www.vandiestbrandstoffen.be/uploads/files/89729534440.pdfIn PDF document text
    • http://asclyziarskyklub.sk/userfiles/file/vederavujetigaxu.pdfIn PDF document text
    • http://princeverma.in/uploads/files/24572197061.pdfIn PDF document text
    • http://waetsukai.jp/system/ckfinder/userfiles/files/73113057543.pdfIn PDF document text
    • https://a-pointpro.com/cms/ckfinder/userfiles/files/91020801792.pdfIn PDF document text
    • http://sirindhorn.net/upload/File/tedapi.pdfIn PDF document text
    • http://joyear.com/ckfinder/userfiles/files/21356750955.pdfIn PDF document text
    • http://myhomeinparis.com/userfiles/files/dunomukalulisuwazez.pdfIn PDF document text
    • http://doggystylzgrooming.com/admin/photos/file/ximifenorewomonazoxasopij.pdfIn PDF document text
    • http://parkwestresidences.com/wp-content/plugins/formcraft/file-upload/server/content/files/16144442c8fe05---nuvawixenimejiwotona.pdfIn PDF document text
    • https://exam10.menapoint.com/app/webroot/upload/files/63895109317.pdfIn PDF document text
    • http://www.rafaellucenaehijos.com/ckfinder/userfiles/files/22871265056.pdfIn PDF document text
    • http://xn--2-7sbddqrtdw3be6jua.xn--p1ai/userfiles/file/xubif.pdfIn PDF document text
    • http://bighost.vn/uploads/userfiles/file/63968200677.pdfIn PDF document text
    • http://supair-lux.hu/ckfinder/userfiles/files/dojomiluzefakejipupogis.pdfIn PDF document text
    • https://amesmedicalservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/161350413452d4---zobiber.pdfIn PDF document text
    • https://rajakeempat.com/contents/files/loburuka.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_off0000b3b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB3B5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cbc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBC7 16112 bytes
SHA-256: bb4e1849671e283732790fa4fe1b46a9e7233c3a7b5f7510a5821e9cd56ed556
font_02_sfnt_off0000f57b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF57B 11044 bytes
SHA-256: 387373ffbb7170bbde270f3150e4854d8ea4bef6f0c3ced69155cfc20399e93d