Malicious PDF — malware analysis report

Static analysis result for SHA-256 32726a7abf8a1cf7…

MALICIOUS

PDF

101.0 KB Created: 2021-09-08 21:53:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 45930e9c89a2e178657baa0342eb5f93 SHA-1: 74bf9af43f7ce2c5d721f3037629551a757f59b8 SHA-256: 32726a7abf8a1cf74b3ef72a6c3fdd30d43339c6ba833c73190152efaf010989
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was identified as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. Heuristics indicate the document functions as a link farm, directing users to multiple external URLs, some hosted on compromised WordPress sites. The presence of numerous links and the use of a 'utm_term' parameter suggest an attempt to lure users to potentially malicious or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9853

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://5of7edwardstreet.com/assets/media/files/80973816668.pdf In PDF document text
    • https://cupanghitam.com/contents/files/towevezevofajosuxebe.pdfIn PDF document text
    • https://asaptransfers.co.uk/wp-content/plugins/super-forms/uploads/php/files/f6397be7b0c0c86f243c5e1a939a43bc/kukowol.pdfIn PDF document text
    • https://stefandes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f0e46c9107---wixitowogigugakuwise.pdfIn PDF document text
    • http://neurooperations.com/ckfinder/userfiles/files/bazometedixuwanebos.pdfIn PDF document text
    • https://leunamgroup.com/wp-content/plugins/super-forms/uploads/php/files/3518ba78eaba889b522a97ca2a410423/99541322571.pdfIn PDF document text
    • http://mijn-nederland.nl/userfiles/file/darugilebumoru.pdfIn PDF document text
    • https://jakspravnenapsa.cz/userfiles/file/42586651700.pdfIn PDF document text
    • http://www.introspekta.si/ckfinder/ckeditor_uploaded_files/files/worima.pdfIn PDF document text
    • http://jockmurray.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134387d32571---13229959626.pdfIn PDF document text
    • http://www.cuadernos.in/wp-content/plugins/formcraft/file-upload/server/content/files/16134f633befea---puxezumizukonubuw.pdfIn PDF document text
    • http://alpha-th.com/userfiles/file/9028460390.pdfIn PDF document text
    • http://salon-urody-bellis.pl/images/file/josarifa.pdfIn PDF document text
    • http://www.grundys.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/161319cc2b645d---20622448523.pdfIn PDF document text
    • http://zh-huaxun.com/uploadfiles/files/rurotarawigisakanunux.pdfIn PDF document text
    • https://swift-tw.com/lcc/upload/files/sudifukegovobinurozuxe.pdfIn PDF document text
    • http://libron.pl/fckupload/assets/file/1094695342.pdfIn PDF document text
    • http://www.platformliften.info/wp-content/plugins/formcraft/file-upload/server/content/files/161360d9a16736---safiwuworafixagowev.pdfIn PDF document text
    • https://alquimia.in/admin/fckeditor/editorfile/51012232122.pdfIn PDF document text
    • https://jogamiskolc.hu/ckfinder/userfiles/files/wufomalirogonu.pdfIn PDF document text
    • http://nadiadsa.org/userfiles/file/zibezo.pdfIn PDF document text
    • https://inprovit.com/ckfinder/userfiles/files/75167487675.pdfIn PDF document text
    • http://szpk.hu/_user/file/lojupivixadasamorop.pdfIn PDF document text
    • http://bilateralmatters.org/userfiles/file/tutesomipekeguzadejixowu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=clash+of+clans+money+glitchPDF 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ece4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECE4 17304 bytes
SHA-256: b2da060065250c28c0080563b4586c5b0e3bebb07f21325c0e2e0ad79e758a19
font_01_sfnt_off000106cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106CD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011ee4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EE4 10828 bytes
SHA-256: 30cfd6fa375cbf6367077ae8b9a719e15b8f7fb66e521b6a17d829f9f5d08266
font_03_sfnt_off000137b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x137B2 1940 bytes
SHA-256: ed4693197efdcfc6b611b98716080273d702660e40b4f90b97c30342d8de64e0
font_04_sfnt_off000140a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x140A2 27852 bytes
SHA-256: 230aa4aab0c579d2fc9fc3522041fa58fb0cc5edcd285f955e325340b5c4c610

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