Malicious PDF — malware analysis report

Static analysis result for SHA-256 03e447ad2e3c07f4…

MALICIOUS

PDF

89.0 KB Created: 2021-06-26 19:15:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b4ddf90a7cf061a0e9f09d11dcfe83b7 SHA-1: 3c60e6c681377f5b93455271be650f5f88fc6862 SHA-256: 03e447ad2e3c07f43bb52e304bb047e35cc4b83a7205d19712eecd55d5eb661b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The file contains numerous embedded URLs pointing to compromised WordPress sites and other domains, suggesting a link farm designed to redirect users to malicious content. The presence of these URLs and the overall structure indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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=16+year+old+receding+hairline
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/a553cb9900341aafa3b20be9fb5b3a66/75780043984.pdf
    • http://bascobrunswick.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1606d5735a47c3---xudoji.pdf
    • http://ccshecea.org/upload/files/jituxerom.pdf
    • http://baraanduliaptti.org/userfiles/file/foxifolomelugitixu.pdf
    • http://cafesezony.ru/fck_editor_files/files/bijozudarajop.pdf
    • http://garmagostaran.com/Upload/file/golumotutenidarijal.pdf
    • https://www.sevgiliyevideo.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a2f4a3c0653---kumofutopade.pdf
    • http://hyderabadibiryanicorner.com/admin/images/file/fezukosarotisopo.pdf
    • http://aberdeeneyes.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160764de956302---29828334062.pdf
    • https://travels-ukraine.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a840ce0bee2---pawiwunulad.pdf
    • https://wills.sg/wp-content/plugins/super-forms/uploads/php/files/db4f4d23892d4107362270232ad44580/53118905545.pdf
    • https://www.helpagesl.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608429a792b89---486528378.pdf
    • https://stcatherine.ac.ug/wp-content/plugins/formcraft/file-upload/server/content/files/160a7a8045b560---kugijixuxamovitetexigobaz.pdf
    • https://ecohort.com/userfiles/files/pakewariwulotegidunuzi.pdf
    • https://sirikulsteel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab9594e5108---bawerozada.pdf
    • https://www.advids.io/wp-content/plugins/formcraft/file-upload/server/content/files/1608d735843a95---23579276497.pdf
    • http://xiangzhuan.tw/upload/files/14941575975.pdf
    • https://artofsurfing.com/preview/ckfinder/userfiles/files/kaginufikoxumijat.pdf
    • https://gw21.ch/uploads/userfiles/file/sorafumor.pdf
    • https://skyfireconsulting.com/wp-content/plugins/super-forms/uploads/php/files/6ohk90i73s7r0j37en9f073kb3/nivasujanagofevekazu.pdf
    • https://nhaban24h.com.vn/wp-content/plugins/super-forms/uploads/php/files/cg3hllvteiiptdqdmcur0h4q59/dugur.pdf
    • http://www.dnevi-sekretarjev.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160b325ba14648---3025139288.pdf
    • http://cambresisemploi.fr/ckfinder/userfiles/files/7155156968.pdf
    • https://www.lokalesichtbarkeit.de/wp-content/plugins/super-forms/uploads/php/files/lkkp3pmnlui8juklqughhj8rki/20521057961.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fa89.bin
c978a655e33fc804ecf6e6b1d38452721948ae90976adfb5cd04aa92684be5be
pdf-font-stream PDF embedded font (sfnt) at offset 0xFA89 10620 bytes
font_01_sfnt_off0001127f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1127F 16792 bytes
font_02_sfnt_off00012a91.bin
9688e6a8c50afcd3c2921949e65ce4423ed97bde1619d4141aaaae9375c40250
pdf-font-stream PDF embedded font (sfnt) at offset 0x12A91 16916 bytes