Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ed924cc3a834efa…

MALICIOUS

PDF

85.5 KB Created: 2021-07-04 10:10:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: 6bf5d20617b947c31d4bc3b3ab46e6ca SHA-1: 306ce71466ecba998f9af0a844fec102bf7107d0 SHA-256: 6ed924cc3a834efaf6c2f34f82fd84517bfcd47135ca84f0d257d363f91ad300
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which appear to be compromised or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The heuristic 'SE_INVOICE_LURE' indicates the document's content is likely a deceptive lure, such as a fake invoice, to encourage downloads. While no scripts were explicitly extracted, the presence of external links and the ML classification strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9860

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
  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://pixomot.ru/uplcv?utm_term=pro+rata+basis+meaning PDF link annotation
    • http://netinflux.net/userfiles/file/fafoj.pdfIn PDF document text
    • http://www.ellisrasbetonwerke.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160b9bea55ec2a---19230988811.pdfIn PDF document text
    • http://niszczeniewaw.pl/userfiles/file/70848485426.pdfIn PDF document text
    • http://stasta.com/userfiles/file/nixemovegepinabe.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b3e70cbc728---wipaluwekojasasubigo.pdfIn PDF document text
    • http://www.annaleehuber.com/content_files/file/24238913134.pdfIn PDF document text
    • https://atolab.it/wp-content/plugins/super-forms/uploads/php/files/203b1aea3442be1344ca7f0875f124ae/15075757293.pdfIn PDF document text
    • http://a-range.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16077d5d28f11a---sapezaletove.pdfIn PDF document text
    • http://vudafrique.com/wp-content/plugins/super-forms/uploads/php/files/effd2ca35aae6ba52d99ac66bfb6a141/nolewefaxopaxesukojela.pdfIn PDF document text
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/1688f5d7f095bfa9dbeef3d15392b5e3/85582214283.pdfIn PDF document text
    • https://abicecream.ru/ckfinder/userfiles/files/tolevutemunob.pdfIn PDF document text
    • http://macabrey-luthier.fr/data/Files/84788901029.pdfIn PDF document text
    • https://cvenhancer.com/wp-content/plugins/super-forms/uploads/php/files/8694873ae0aaf293516d28b1125eb53c/rolaluserojosoxodefalaka.pdfIn PDF document text
    • http://chargers68-50th.com/clients/3/3d/3dd154274af4887fbe356f6dcfc18689/File/rodugezigafudoponupekor.pdfIn PDF document text
    • http://consulcongress.it/uploads/assets/file/51452248821.pdfIn PDF document text
    • http://daindnc.com/fckeditor/userfiles/file/2022454033.pdfIn PDF document text
    • http://getawaynewzealand.co.nz/wp-content/plugins/formcraft/file-upload/server/content/files/1606ffab01b80c---ruxunewiraponumifomek.pdfIn PDF document text
    • https://bestmiamiturf.com/wp-content/plugins/super-forms/uploads/php/files/f2d24842759d7367f59ebb38287bd48b/jesivijovufopun.pdfIn PDF document text
    • http://statsale.com/data/upload/ck/files/63220206970.pdfIn PDF document text
    • http://toptoptraining.ru/img/upload/file/raxanegut.pdfIn PDF document text
    • http://www.nbrownies.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608abebe78e4e---xenezufamujakadi.pdfIn PDF document text
    • https://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/1e61ffd9f50a3b0d0d753a34de09554a/57585452163.pdfIn PDF document text
    • http://baovephuongtroi.com/vietkiendo/upload/file/23630471615.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609033c06894d---vosesabunebinom.pdfIn PDF document text
    • http://lamachine.nl/userfiles/file/zapij.pdfIn PDF document text
    • http://anaminfo.com/attachfile/file/sasivijobonumimuri.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_off0000e92f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE92F 10548 bytes
SHA-256: ffe3bbd51e5ae58934fdf28ba71035924ef3e0e3b37606eacfcd30996c3bbf9e
font_01_sfnt_off00010138.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10138 18152 bytes
SHA-256: aae1164453da634a42d7791d28a02def8b75ea3ada478b90c208e6b307795262
font_02_sfnt_off00013075.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13075 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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