Malicious PDF — malware analysis report

Static analysis result for SHA-256 9df9fd844ead825a…

MALICIOUS

PDF

90.5 KB Created: 2021-08-08 19:01:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 40d1d8c5ccb4a77394a9b8448d124b56 SHA-1: 9c2cc601a8ae901709ee74bc925d6af90441114d SHA-256: 9df9fd844ead825a835a17bf50a51e7f22868d1627f646b2e8e5a3cb09d83fc0
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier with high confidence. It contains numerous URLs, many pointing to compromised websites or disposable hosting, forming a link farm. The presence of 'cmd' in a URL suggests an attempt to execute commands or exploit vulnerabilities, likely to download and execute a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9954

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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://blv.by/upload/editor/files/bizuvonelagoferixiwogobif.pdf In PDF document text
    • http://www.lightingandhvacexpo.com/wp-content/plugins/super-forms/uploads/php/files/f2a148b280e9d4049e6a10e1dc815f95/rapagimujosun.pdfIn PDF document text
    • http://ucinnovation.ru/admin/ckfinder/userfiles/files/pufesiminezenajumi.pdfIn PDF document text
    • http://baharemadinah.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f18bb65246---14593395503.pdfIn PDF document text
    • http://www.inhd.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16092b34c9f38e---rojajapejuruwiz.pdfIn PDF document text
    • https://www.davidcosz.de/wp-content/plugins/super-forms/uploads/php/files/q9fph8rlo3ccmdi1k03o30452p/58771114978.pdfIn PDF document text
    • https://bcbc3399.com/upload/files/66696803739.pdfIn PDF document text
    • http://pulsarvn.com/media/ftp/file/36401278519.pdfIn macro / runtime command snippet
    • http://www.oneworldkarate.com/fckeditorimages/userfiles/file/rixilebiwanudurebagix.pdfIn macro / runtime command snippet
    • http://suvagcentr.ru/userfiles/files/demekalonul.pdfIn PDF document text
    • https://www.onestopnaturalstore.ca/wp-content/plugins/super-forms/uploads/php/files/l4du94jfi88929ido87sjtlsgh/25929609563.pdfIn PDF document text
    • https://centrosteadycam.it/wp-content/plugins/super-forms/uploads/php/files/8422cf67ebaf91589627ba00ee9213d6/xivajo.pdfIn PDF document text
    • https://aartipalette.com/userfiles/file/95800124965.pdfIn PDF document text
    • https://aquaticlandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607421228731b---47006714335.pdfIn PDF document text
    • http://emeat.ru/var/files/64947076113.pdfIn PDF document text
    • http://www.holzbau-hoelzl.at/wp-content/plugins/formcraft/file-upload/server/content/files/1608adba7244a3---vurijemufimazuvuvoju.pdfIn PDF document text
    • https://lsp.od.ua/wp-content/plugins/super-forms/uploads/php/files/bolja4565dl9eki9amfpgoc366/leluranuj.pdfIn PDF document text
    • http://casaatlantida.com/userfiles/file///51015348990.pdfIn PDF document text
    • http://gibkrakow.pl/uploads/files/25961594662.pdfIn PDF document text
    • https://hotellemaritime.com/hotel/upload/files/16924699150.pdfIn PDF document text
    • http://www.kickcommerce.com/userfiles/file/83900745990.pdfIn PDF document text
    • https://www.dishdivvy.com/wp-content/plugins/super-forms/uploads/php/files/2cf8eb765f09f6a28c7c8063700e8a5e/fuzijinoxiloxalosizod.pdfIn PDF document text
    • http://roycraft.ca/userfiles/file/74404566308.pdfIn PDF document text
    • http://aarogyamedico.com/userfiles/file/73441875682.pdfIn PDF document text
    • http://podiummoda.ru/userfiles/file/zuvamigipubesubakobasax.pdfIn PDF document text
    • http://yatros.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16093a6fda2f71---xudutefosizabajavone.pdfIn PDF document text
    • https://bcbc3399.com/upload/In macro / runtime command snippet
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=horse+riding+tales+mod+apk+unlimited+moneyPDF 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_off0000f956.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF956 17984 bytes
SHA-256: f7a1d719be066b24d68d533db3daa39d66d2b6841f0a8613d1aa0efcaf42ab9a
font_01_sfnt_off00012821.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12821 11032 bytes
SHA-256: c184f3dd9d873ed3a9315bbf9ce9d592a06f0710103e8a61cfe9355096df2991
font_02_sfnt_off0001418f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1418F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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