Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab4562a4bd121c0a…

MALICIOUS

PDF

76.2 KB Created: 2021-09-03 00:25:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: b4b5ca233041f9e953e2637d250f75be SHA-1: 9096fdd0e7f3d92c9b81f5df968f10c41082a2bb SHA-256: ab4562a4bd121c0a0c4051c1b92d1c0458360d19e04c8202e0876eeffa97c458
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV identifying it as 'Pdf.Phishing.Trojan'. The file contains a link farm pointing to various domains, many of which are hosted on compromised CMS platforms or disposable hosting, suggesting an attempt to distribute malicious content or phish users. The presence of embedded URLs and the nature of the heuristics indicate a likely intent to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://asiaviews.org/wp-content/plugins/super-forms/uploads/php/files/5vuu648mh06srfmgv3pmvuj1d0/48203764744.pdf In PDF document text
    • http://www.sandzthabapanel.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/161313ced3edc0---75886389009.pdfIn PDF document text
    • https://lesartsdansmonjardin.com/userfiles/file/20210705233509.pdfIn PDF document text
    • http://xn--49s538bo8ux8c.net/userfiles/file/3825350688.pdfIn PDF document text
    • https://stellabakingcompany.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d37c2b9829---83291210834.pdfIn PDF document text
    • http://steelbo.com/uploads/admins/u0/files/20210809135912.pdfIn PDF document text
    • https://controlcert.se/wp-content/plugins/formcraft/file-upload/server/content/files/160da5a0307264---ragoxumobovuzazedajosed.pdfIn PDF document text
    • https://fonixkoncert.hu/upload/file/69886795551.pdfIn PDF document text
    • https://atolab.it/wp-content/plugins/super-forms/uploads/php/files/6fb8192655422f255cba6bdc12a4fce4/66888650980.pdfIn PDF document text
    • http://eventologia.com/userfiles/files/gebowup.pdfIn PDF document text
    • http://gelikonline.ru/content/Files/12198027374.pdfIn PDF document text
    • http://vetcarefoundation.org/userfiles/file/25286126915.pdfIn PDF document text
    • http://gruppocinofilomarsalese.com/userfiles/files/45123522937.pdfIn PDF document text
    • http://snookerfootball.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160815185e1078---talojux.pdfIn PDF document text
    • https://twr1115.net/files/fckeditor/file/30697580230.pdfIn PDF document text
    • http://www.pibmg.com.br/ckfinder/userfiles/files/files/sifakitosopa.pdfIn PDF document text
    • https://saftanton.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1609a039eee9b8---83033307715.pdfIn PDF document text
    • http://imhkayseri.com/resimler/files/44861627764.pdfIn PDF document text
    • https://aviatroglo.fr/IMG/file/fafiwus.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091c5b3ece6d---kikateb.pdfIn PDF document text
    • https://marathonlaval.com/userfiles/files/megebizasabexatuwe.pdfIn PDF document text
    • https://vickers-electronics.co.uk/wp-content/plugins/super-forms/uploads/php/files/53df1dddebef2ab4b1cfe13b401ef36e/wifeva.pdfIn PDF document text
    • http://drapa-technika.cz/UserFiles/File/94063378900.pdfIn PDF document text
    • http://bubblesoflove.net/wp-content/plugins/formcraft/file-upload/server/content/files/1609875b6d544c---9916281608.pdfIn PDF document text
    • https://peterdegendt.be/file/gikekaderitejejolokujone.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=year+one+nora+roberts+pdf+free+downloadPDF 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_off0000c35d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC35D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000db6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB6F 18072 bytes
SHA-256: 4eab287b9f1fcdedcfb1583f77021d800d8147c7d6bb4e03cf9262a2be73f675
font_02_sfnt_off00010a29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A29 10608 bytes
SHA-256: d94b86dbf692073c5753a8f86bcbb0b2557ccb46792538f056eb0d31b2886c77

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