Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b6b9702c1776ea2…

MALICIOUS

PDF

75.6 KB Created: 2021-09-07 10:57:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 49102152dcbe06f18f9b80da29fab3f1 SHA-1: 8fecd24f47db122ad1dea529685987f1076541e5 SHA-256: 9b6b9702c1776ea23b5552123405bcda92bddbe399dfd914f567ce5cac8e905c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to compromised websites, indicating a phishing or redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to lead the user to a malicious payload or exploit. The presence of PDF link farm heuristics further supports the malicious nature of the document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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 http://counterreaction.net/wp-content/plugins/formcraft/file-upload/server/content/files/1609050a9ebe9e---157134184.pdf In PDF document text
    • http://studioturina.com/userfiles/files/gewoxese.pdfIn PDF document text
    • http://helloshoppingnepal.com/userfiles/file/dukufidemojunalakavetus.pdfIn PDF document text
    • http://debden.org/userfiles/file/xugibepetalotixumivam.pdfIn PDF document text
    • http://transsnabstroy.com/userfiles/file/74366185871.pdfIn PDF document text
    • https://coluer.ir/documents/file/65546495242.pdfIn PDF document text
    • http://dgxzz.com/uploadfile/file/94203084048.pdfIn PDF document text
    • https://foulardfotografando.it/file/70479015936.pdfIn PDF document text
    • http://www.restorationservice.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16079f20fd10b2---95794398187.pdfIn PDF document text
    • http://bluebiz.kr/userData/board/file/vetekurogufaz.pdfIn PDF document text
    • https://qkon.ca/images/file/rubekinatemit.pdfIn PDF document text
    • http://ayurveda-shiatsu-nice.com/upload/files/darinujojomaxaponi.pdfIn PDF document text
    • http://decom.pro/admin/ckfinder/userfiles/files/zegexadowadefixejada.pdfIn PDF document text
    • http://zaragozalawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/furunubomeleditinuladivur.pdfIn PDF document text
    • http://otoozevran.com/resimler/files/zupogamuz.pdfIn PDF document text
    • http://bagandpack.ru/wp-content/plugins/super-forms/uploads/php/files/53d6c55dd76977294d7f10022ddc9c40/xaduzijaviwemu.pdfIn PDF document text
    • https://comesa.com.pe/wp-content/plugins/super-forms/uploads/php/files/bkid9dcglu563dfsaj8q54cdc3/147693434.pdfIn PDF document text
    • https://parfumzone.ro/files/file/4022849085.pdfIn PDF document text
    • http://olech-rzeszow.pl/userfiles/file/pugimatafizopikeb.pdfIn PDF document text
    • https://lawina-radom.pl/files/file/puxogokelijijurusuva.pdfIn PDF document text
    • http://51-lq.com/userfiles/file///zalemew.pdfIn PDF document text
    • https://luminex.pl/upload/file/sipomuxabanixoxakik.pdfIn PDF document text
    • http://itps-group.com/uploadfiles/file/77955805021.pdfIn PDF document text
    • http://pattonbrayboy.com/clients/8/84/8444fd18e659e4cf0f5d78ff5dcadce3/File/kotugoburisipumopile.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=subaru+svx+manual+transmission+conversionPDF link annotation
    • 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_off0000c270.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC270 10876 bytes
SHA-256: ffe24a5003b18e366b810c5c70b4215b4a2c30933a4490eb91c2f41698083ea7
font_01_sfnt_off0000db95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB95 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f3a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3A7 17328 bytes
SHA-256: 85925d380baca5a1a5315a8a3af2421dc61f30e37ac46aba340c53c539d8a381

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