Malicious PDF — malware analysis report

Static analysis result for SHA-256 0122ded196becd65…

MALICIOUS

PDF

94.1 KB Created: 2021-06-26 00:13:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 89428716963cf1f7ba2025079a426a05 SHA-1: b5af6d6ee7e9fc4165f7e6bb993e6237687a7590 SHA-256: 0122ded196becd65e7123203e488606c608931c0ccf623b592e484251abe01fd
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file was detected by ClamAV as Pdf.Phishing.Trojan and flagged by an ML classifier, indicating malicious intent. It contains numerous links to compromised WordPress upload storage and disposable hosting, suggesting it's part of a link farm designed to redirect users to malicious sites. The PDF structure and embedded URLs point towards a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://cructi.ru/uplcv?utm_term=vowels+malayalam+meaning PDF link annotation
    • http://www.yourhealthyourchoice.org/wp-content/plugins/formcraft/file-upload/server/content/files/16082698f32c9e---11217245704.pdfIn PDF document text
    • https://chiuman-hk.com/images/file/lugiwutonuzoxe.pdfIn PDF document text
    • http://mu-rrrc.com/userfiles/file/taxogizafadevevebu.pdfIn PDF document text
    • https://atolab.it/wp-content/plugins/super-forms/uploads/php/files/8fd12051d6b0215c444584e4a917a4ab/61270500047.pdfIn PDF document text
    • https://www.mercato.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160886a299b2a5---94315762182.pdfIn PDF document text
    • http://arcdesantmarti.com/biocop/Images/images-editor/file/12102022397.pdfIn PDF document text
    • https://allcreaturesinc.com/files/files/51498710453.pdfIn PDF document text
    • http://sushikyototogo.com/uploads/files/newekanimurumovijuliges.pdfIn PDF document text
    • http://www.niziointerior.pl/upload/file/47287393630.pdfIn PDF document text
    • http://cheumst.com/upload/fckeditor/file/49756405302.pdfIn PDF document text
    • https://www.popcaffe.it/wp-content/plugins/super-forms/uploads/php/files/83ddb2b44f4eb09565c0d40e2da897c6/mowitamivulesenemaw.pdfIn PDF document text
    • https://www.proctoloji.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607386ffc7ed5---62235104057.pdfIn PDF document text
    • https://www.gsccn.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608dfc7e093d3---66936765664.pdfIn PDF document text
    • http://sciencevier.com/wp-content/plugins/formcraft/file-upload/server/content/files/160830d601b683---xamasi.pdfIn PDF document text
    • http://asalsold.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b9d1b0a0f9a---dajebazilonog.pdfIn PDF document text
    • http://www.theflightfest.com/wp-content/plugins/formcraft/file-upload/server/content/files/160885d33a1d3a---foguxiwitinoluwaximuwaf.pdfIn PDF document text
    • http://drvision.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608152cd2733a---44865363025.pdfIn PDF document text
    • https://jennysbooks.com/wp-content/plugins/super-forms/uploads/php/files/b9008eb131359bea3e368ce0bb5a66a8/xesuvavubetuderuse.pdfIn PDF document text
    • https://accesoriosalmayor.com/images/userfiles/file/40416489066.pdfIn PDF document text
    • https://matrainagycsalados.hu/userfiles/file/tajowat.pdfIn PDF document text
    • https://jiptv.nl/wp-content/plugins/super-forms/uploads/php/files/347586h3qm26k98abca7qscma1/filitalujazasilakaro.pdfIn PDF document text
    • https://stef-nancy.fr/upload/document/tuzebapavejefoku.pdfIn PDF document text
    • http://3e-recycling.ru/app/webroot/filesfiles/jeralopijiwepupomo.pdfIn PDF document text
    • https://cgeminfos.ma/upload/file/15967226994.pdfIn PDF document text
    • http://africareview.in/userfiles/file/vuzevowunulib.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_off000102ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102FF 10424 bytes
SHA-256: 52c7d5d147b3e22909f466611424f2affbd40d1972b09c6f6dc4a85a0dd47fd4
font_01_sfnt_off00011ab1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AB1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000132c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132C3 22552 bytes
SHA-256: 41d1d7e9629453b8b004295d85aa6fa4db20cd592ecde4160ab207a48976a0ff

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