Malicious PDF — malware analysis report

Static analysis result for SHA-256 32d840dc52766114…

MALICIOUS

PDF

81.3 KB Created: 2021-09-07 21:16:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 6f4051e048fa908544f024f209ee98ff SHA-1: 91f848bbe8f031399affce240ee613ebcb175cc7 SHA-256: 32d840dc52766114f19b0eebd2f0f25e0ec688a50595e2e0a8f97efa7fb055bb
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by multiple heuristics as malicious, including a high-confidence ML classifier and ClamAV detection. It functions as a link farm, directing users to numerous external URLs, many of which are hosted on compromised WordPress sites or disposable domains. The embedded links appear to be part of a phishing or scam campaign, as indicated by the UTM parameters in some URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

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://synerhu.ru/uplcv?utm_term=demande+de+raccordement+provisoire+enedis+pdf PDF link annotation
    • http://www.nandomoraes.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160774e306dd60---jadipisumojusanajopek.pdfIn PDF document text
    • https://studio45.live/wp-content/plugins/super-forms/uploads/php/files/5q1eddili5lr9e5vvrnulq0vss/36727480841.pdfIn PDF document text
    • http://minuspk.ru/minuspk.ru/userfiles/file/96287511935.pdfIn PDF document text
    • http://matstravel.ru/userfiles/file/guxamasumixapas.pdfIn PDF document text
    • https://georgiamusicpartners.org/wp-content/plugins/super-forms/uploads/php/files/03a241fb663fdb7f048fb9fe81f5989b/kujipowojowa.pdfIn PDF document text
    • https://saraelv.no/wp-content/plugins/formcraft/file-upload/server/content/files/160a7170e13d01---6955471565.pdfIn PDF document text
    • http://www.trimbleexpress.sk/wp-content/plugins/formcraft/file-upload/server/content/files/16093f81dc112b---71948705590.pdfIn PDF document text
    • https://lapalettedesarts.fr/gestion/file/gijeloxevamapomo.pdfIn PDF document text
    • http://sartor.ru/upload/files/fuxipusabujuju.pdfIn PDF document text
    • http://premiumresourcing.com/wp-content/plugins/formcraft/file-upload/server/content/files/16131e2ffcf27a---85024156883.pdfIn PDF document text
    • https://benchmarktransitions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160baae4074e86---puzegidejobadukijiwipa.pdfIn PDF document text
    • https://www.sevgiliyevideo.net/wp-content/plugins/formcraft/file-upload/server/content/files/1606f35af6f01c---guxugezadilivon.pdfIn PDF document text
    • http://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b469f713556---joluzupenodenowuturuji.pdfIn PDF document text
    • https://www.sgestrecho.es/wp-content/plugins/formcraft/file-upload/server/content/files/16100faee9eb02---42752675205.pdfIn PDF document text
    • https://megalightgroup.lv/uploads/files/61689015448.pdfIn PDF document text
    • http://mutitar.com/user_img/files/ruguredenubonapojuvomum.pdfIn PDF document text
    • https://completecollegestrategies.com/wp-content/plugins/super-forms/uploads/php/files/e9e60f92edff2aa2f254de8538a43950/86276231451.pdfIn PDF document text
    • http://edwindijk.nl/home/edijk/domains/edwindijk.nl/public_html/uploads/file/53967467951.pdfIn PDF document text
    • https://cristalparkhotel.com.ve/ckfinder/userfiles/files/18752443491.pdfIn PDF document text
    • http://ankaser.com/userfiles/file/wovimoxizuzadevimek.pdfIn PDF document text
    • http://degeninhotel.ru/admin/ckfinder/userfiles/files/89095458264.pdfIn PDF document text
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/f476e97dc40d5153bbfb8eafbfe94280/jevip.pdfIn PDF document text
    • https://www.expoagrogto.com/wp-content/plugins/super-forms/uploads/php/files/rcvlf85046r20ai8lep045mk54/28514672924.pdfIn PDF document text
    • http://dermaktif.com/imgup/file/60724953436.pdfIn PDF document text
    • https://cspdental.com/wp-content/plugins/super-forms/uploads/php/files/77f82832ec911476c0f0a5cea623a606/34081070857.pdfIn PDF document text
    • http://3colorjazz.com/fckeditor/userfiles/image/33114262257.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_off0000d86c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD86C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f083.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF083 10800 bytes
SHA-256: b4bdd7a1c1dd390fb19d3382928bd54bd22d75ba8110117353950e596c78cb24
font_02_sfnt_off00010962.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10962 18484 bytes
SHA-256: 466f40f5e0dfcd50d95d4e0b32d2fddaa9d91d5497e636a56e87132f2ed6baa0

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