Malicious PDF — malware analysis report

Static analysis result for SHA-256 96df61a5bc301bdb…

MALICIOUS

PDF

90.3 KB Created: 2021-08-07 15:31:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 60f7d743556e69774478c86ede2e3a80 SHA-1: 4a70fb7df0240a36833ea09b627cd35be020e2b3 SHA-256: 96df61a5bc301bdbfda8f2e5e8a1ae9faee880b7814e048fb50062d79897c156
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links to external websites, many of which are hosted on compromised CMS uploads or disposable domains, suggesting a link farm or phishing lure. The presence of embedded URLs and the PDF structure point towards an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9945

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://journeypeople.cc/wp-content/plugins/super-forms/uploads/php/files/1c1bac6f604f486a04b24f550601f42f/66502774112.pdf In PDF document text
    • http://camionespanamericana.com/userfiles/file/najup.pdfIn PDF document text
    • http://aarogyamedico.com/userfiles/file/wifusorowix.pdfIn PDF document text
    • http://www.agrosystem.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1607975f92ddb0---73250400768.pdfIn PDF document text
    • http://htwy.com/upload/file/71046582538.pdfIn PDF document text
    • https://hmv.ir/wp-content/plugins/formcraft/file-upload/server/content/files/16081210c2ab88---niramemaze.pdfIn PDF document text
    • https://red-adlay.com/upload/files/32027746443.pdfIn PDF document text
    • http://noahsmarinesurveyors.ca/userfiles/file/zagixagoboderodaxanalef.pdfIn PDF document text
    • http://aaaexpressheating.com/userfiles/file/tagoponawawexijimusoloko.pdfIn PDF document text
    • http://es-manzokudou.com/yamituki-n/uploads/files/xoviwogep.pdfIn PDF document text
    • https://www.allterra.group/wp-content/plugins/super-forms/uploads/php/files/9f25f879d1c5d19fdb2440fdf2a32c10/51106224412.pdfIn PDF document text
    • http://studiosiriosrl.it/userfiles/files/jabejixitazelanuwaw.pdfIn PDF document text
    • https://corianderedmonton.com/ckfinder/userfiles/files/76936784309.pdfIn PDF document text
    • http://www.ausafrica.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1608d95f6bda39---tevitizud.pdfIn PDF document text
    • http://asustainable.com/global/file/pojifokelelitazil.pdfIn PDF document text
    • https://briljant-maleri.se/UserFiles/files/xusopipolif.pdfIn PDF document text
    • http://www.awakohchang.com/image/upload/File/italewajov.pdfIn PDF document text
    • http://www.assignproject.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073983b0ed12---99413335854.pdfIn PDF document text
    • http://apartmaji-zunicmile.com/uporabnik/file/29546220009.pdfIn PDF document text
    • https://foodsafebox.com/ckfinder/userfiles/files/wuvimugabanedudusuzazus.pdfIn PDF document text
    • https://englewoodgrassfarm.com/wp-content/plugins/super-forms/uploads/php/files/752a0191148691e1e0009a9a3784d429/66074320313.pdfIn PDF document text
    • https://auto-rujo.com/images-editor/file/jopugekaxepovoxujodasalo.pdfIn PDF document text
    • https://www.grandiosa.is/wp-content/plugins/super-forms/uploads/php/files/5db8imdpim2tg1dved80agpvl7/lenoxisitinifebuxe.pdfIn PDF document text
    • http://arcomproltd.com/userfiles/file/97767845726.pdfIn PDF document text
    • http://pierrevillers.fr/mairie_files/file/gegitonitegezuvel.pdfIn PDF document text
    • https://gservicepz.com/wp-content/plugins/super-forms/uploads/php/files/b54b7eef8ca899e13e47e4cb4f44bbcc/jizopiwuwi.pdfIn PDF document text
    • http://boulderdivorcelaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3d285d29ea---turupevufajowijiwarelugun.pdfIn PDF document text
    • http://omniatel.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607332032e865---xiridafefazin.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=how+to+do+velocity+vs+time+graphsPDF 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_off0000fb5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB5F 17564 bytes
SHA-256: df3086da0b97dc596a09fbba787a06431ae5075ee320d2386ceb30a4f19fcbc0
font_01_sfnt_off000128f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128F3 11116 bytes
SHA-256: 9f8f3741178e2bf8b5a2c856e59fb2860beefedac748e72c60808a4d4b124b80
font_02_sfnt_off000142ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x142AD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1