Malicious PDF — malware analysis report

Static analysis result for SHA-256 9fb0238c1244f761…

MALICIOUS

PDF

81.8 KB Created: 2021-09-04 22:21:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 77b321260c90d09f0683b97276d7ee0a SHA-1: 731a4a84b9b7d21256070b20463a0fdef2b186f6 SHA-256: 9fb0238c1244f761312a9a119d3372d62fd38caac8418423e116da8f059fdd4f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, indicating a high likelihood of malicious intent. It contains numerous links to external websites, many of which appear to be compromised or disposable hosting, suggesting a link farm or phishing lure. The presence of embedded URLs and the nature of the heuristics point towards an attack pattern involving directing users to potentially harmful sites.

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://ketchas.ru/uplcv?utm_term=pdf+to+jpg+converter+application PDF link annotation
    • http://hoanggiaphatland.com/uploads/image/files/gafexudisikezirebijeduwul.pdfIn PDF document text
    • http://joshuadacosta.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612fe6e6c22ef---vepokavasevus.pdfIn PDF document text
    • http://labsshop.com/d/files/45682656536.pdfIn PDF document text
    • http://dtyxbpzx.com/filespath/files/20210901034527.pdfIn PDF document text
    • http://lab4050.com/upload/editor/file/34134086691.pdfIn PDF document text
    • https://pezenasenchantee.fr/userfiles/file/52733289339.pdfIn PDF document text
    • http://alexforstarlight.com/clients/4/41/4125d763bdae894b2c088b8c4c0f4705/File/nunigodogosadijer.pdfIn PDF document text
    • https://alixdemassy.fr/userfiles/file/wexomukazilesu.pdfIn PDF document text
    • https://selapro.com.au/application/third_party/ckfinder/userfiles/files/33631674129.pdfIn PDF document text
    • https://vinocastillo.hu/editor_up/78016800793.pdfIn PDF document text
    • http://aimic.com/userfiles/file/talixid.pdfIn PDF document text
    • https://www.scilights.com/wp-content/plugins/super-forms/uploads/php/files/f3417bae87f014cb173df4cef18605d7/solebid.pdfIn PDF document text
    • https://bamfieldrental.com/userfiles/file/6496834016.pdfIn PDF document text
    • http://amtusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160790414ebd96---zawagixapetuvasenubumozim.pdfIn PDF document text
    • http://xn--e1aazeoc7d.xn--p1ai/images/shared/file/43372499277.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f9308ea8e86---95269789944.pdfIn PDF document text
    • https://room12shio4.com/contents//files/9115801650.pdfIn PDF document text
    • https://namastehealth.in/wp-content/plugins/super-forms/uploads/php/files/mlacpolea5tg4kie4ceouncnlv/tiwozinemobonejuzis.pdfIn PDF document text
    • http://sistarelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/lomed.pdfIn PDF document text
    • https://majorsagilekvaros.hu/uploads/file/sivikuruguwonidijamurilu.pdfIn PDF document text
    • http://tvkinter.com/file_media/file_image/file/89093372149.pdfIn PDF document text
    • http://animalscipublisher.com/files/upfiles/file/noleweboma.pdfIn PDF document text
    • http://tries.cz/media/images/upload/file/nuxivurusetek.pdfIn PDF document text
    • https://borderpak.com/wp-content/plugins/super-forms/uploads/php/files/3197a627468fb2f1ae3e8414ad20b63d/dosetatexefiwiken.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_off0000dca5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCA5 10824 bytes
SHA-256: e25882dad8fcb10bbacf3398afe59c25813f89558bfedd6896cb94dc47f0ec56
font_01_sfnt_off0000f582.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF582 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010d94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D94 16876 bytes
SHA-256: bb27b489c6a0977b8cc70b8244bd3491e5e1c0aa50ea93534a0b7cd891dc4353

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