Malicious PDF — malware analysis report

Static analysis result for SHA-256 bec8e767f82de743…

MALICIOUS

PDF

97.0 KB Created: 2021-06-30 11:24:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: bfc33e483d22be7e53acd76545d8746b SHA-1: 142ffedaacd65b3d0ab764f31802525aaa1c5048 SHA-256: bec8e767f82de743781b5c5ffbe5b29ae9cb25b1c5596b2d3f1718829a0bbb96
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. It functions as a link farm, containing numerous URLs pointing to compromised websites and potentially disposable hosting. The primary attack pattern observed is the distribution of malicious links, likely leading to phishing sites or further malware downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9936

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://archism.ru/uplcv?utm_term=coronary+circulation+of+the+blood+diagram PDF link annotation
    • http://beetsom.com/PROGRAM_FCKeditor_UserFiles/file/1446692586609cb6ddad0cf.pdfIn PDF document text
    • http://jaatkinson.com/userimages/66195464600.pdfIn PDF document text
    • https://imapcb.org/wp-content/plugins/super-forms/uploads/php/files/ij8qpimh8jd67p5erif22ckc54/94878712321.pdfIn PDF document text
    • https://best-turbos.com/wp-content/plugins/super-forms/uploads/php/files/357e6e776579d5990ed5b16b8834647a/17713537529.pdfIn PDF document text
    • https://gtsonline.nl/wp-content/plugins/super-forms/uploads/php/files/4bf9j66o6u1pk2164asg6004rm/padusa.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607da5d44e863---45728446499.pdfIn PDF document text
    • http://kidsjeodo.com/images/files/zegekexum.pdfIn PDF document text
    • http://www.appsolutely.sg/wp-content/plugins/formcraft/file-upload/server/content/files/160be3fcbb45fd---29973595793.pdfIn PDF document text
    • http://inspirationallabels.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160adf50d44c6f---zonebimakuke.pdfIn PDF document text
    • http://boekenwinkelindex.nl/images/uploads/83737795883.pdfIn PDF document text
    • https://donnasalon.ru/wp-content/plugins/super-forms/uploads/php/files/8586219741f444075656bc07a6b9ae03/dezaba.pdfIn PDF document text
    • https://www.davinci.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160bf87a515f2a---65283766603.pdfIn PDF document text
    • http://pileshoppen.dk/userfiles/file/42922694005.pdfIn PDF document text
    • https://pluckywize.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099f3ae933f3---xebugipavovadelunimalegu.pdfIn PDF document text
    • http://brukbet.com/user_images/file/35177267377.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/78142729603.pdfIn PDF document text
    • http://freemansphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/160db6e4c3265e---61376171535.pdfIn PDF document text
    • http://meteosputnik.ru/userfiles/file/sesezenomavewekot.pdfIn PDF document text
    • http://www.christinemartin.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607dd09b69b89---xoneliwidadogorekogowepa.pdfIn PDF document text
    • http://jakebenmd.com/clients/0/0e/0eef9d569b11303d075d19626cc6f958/File/80615935619.pdfIn PDF document text
    • http://liffeyartefacts.com/fckimagefile/file/23862342605.pdfIn PDF document text
    • https://www.myjamaicais.com/wp-content/plugins/super-forms/uploads/php/files/09fda021783d3bfcdd5ae0c1e2f4971e/sitejo.pdfIn PDF document text
    • http://aihyang.com/userfiles/file/82961324306.pdfIn PDF document text
    • https://fablab808.com/nbloom/fckuploads/file/xosaxigiwubisevusifadepuw.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_off000116da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116DA 17516 bytes
SHA-256: 3ef105ebf3e6c5df17a2941080da541a27340e041ce06d74805914e0081cd591
font_01_sfnt_off000144bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x144BC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00015cd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15CD3 11140 bytes
SHA-256: 06120a72a9e8024712ef4daf8447c5dd198e1c3b5cba9ddcb038baa19586f134

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