Malicious PDF — malware analysis report

Static analysis result for SHA-256 f984ec38df12dfa7…

MALICIOUS

PDF

72.2 KB Created: 2021-09-23 13:44:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 6cb7d7bfff50f30d33e240ad216d19fc SHA-1: a0fa95c2d55256e79e4a31b6b7c8383c0591a2a5 SHA-256: f984ec38df12dfa76e657ae38ceb529a82f3ac724cfedf23da8c9bf5de00c7cd
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. It contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the nature of the heuristics strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9840

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://allytemp.ru/uplcv?utm_term=noizz+video+editor PDF link annotation
    • https://mavismanagement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614bf0079727d---98880356159.pdfIn PDF document text
    • http://osstemcardiotec.com/files/fckeditor/file/8806375566132a9fda2286.pdfIn PDF document text
    • http://bitite.lv/media/txt/122/file/memiwitefomojemufeloxu.pdfIn PDF document text
    • http://free-note.kr/files/fckeditor/file/1730222485614899d8b4c1b.pdfIn PDF document text
    • http://h-st.nl/bestanden/files/20925133062.pdfIn PDF document text
    • https://www.leasing.net.in/ckfinder/userfiles/files/kavas.pdfIn PDF document text
    • http://phanphoiongnhuahoasen.vn/upload/files/25328874458.pdfIn PDF document text
    • https://servicepapik.ro/files/volevelusiluz.pdfIn PDF document text
    • http://kronospan-mofa-hungary.hu/editor_up/12515200469.pdfIn PDF document text
    • https://nutricount.cz/UserFiles/File/gilibinikur.pdfIn PDF document text
    • https://rcvizovice.cz/ckfinder/userfiles/files/wezapugo.pdfIn PDF document text
    • https://www.birdandwildlifeteam.com/wp-content/plugins/formcraft/file-upload/server/content/files/16149ab050656e---87268350358.pdfIn PDF document text
    • https://chanty.dacola.com/upload/files/zetaza.pdfIn PDF document text
    • https://cananalimdar.com/wp-content/plugins/super-forms/uploads/php/files/ul2om8dhbbds5ooi528ltgosk1/79138709840.pdfIn PDF document text
    • http://affordableadobe.com/ckfinder/userfiles/files/98340487338.pdfIn PDF document text
    • http://webhoctot.com/app/webroot/uploads/files/xufisuxilisaw.pdfIn PDF document text
    • http://triumphtoday.org/wp-content/plugins/formcraft/file-upload/server/content/files/1614c1b5110f50---majelugilakufesotod.pdfIn PDF document text
    • https://okazionche.com/files/92673875542.pdfIn PDF document text
    • http://kondicionery-domodedovo.ru/upload_picture/file/24258639568.pdfIn PDF document text
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/a52b5281fa5e1a8858dc4d0b8ad9f56d/wasunipunabesiv.pdfIn PDF document text
    • https://haltia.mx/sii/ckfinder/userfiles/files/61921390433.pdfIn PDF document text
    • http://architettobotteonpierpaolostudioabacus.it/userfiles/files/3114110652.pdfIn PDF document text
    • http://talk200.com/admin/admin/uploadfiles/file/58675633371.pdfIn PDF document text
    • http://emilybarnes.com/DEVELOPMENT/VERSIONED/emilybarnes/trunk/sites/default/files/file/nekafobedifodavip.pdfIn PDF document text
    • http://deborahkay.com/ckfinder/userfiles/files/54464596872.pdfIn PDF document text
    • http://kiko168.com/UploadFile/file/20210903222741748.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_off0000bd88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD88 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d59a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD59A 15696 bytes
SHA-256: 76e05b3534110afe01ee4544376bb6828d3d188c9f169adf73f588f13ecfa888
font_02_sfnt_off0000fd7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD7B 9864 bytes
SHA-256: 778d845071f3fdaa4d713c20f8d8cf8a4fcbf0e2455b226a1815ebb561e8a8d8

Open this report in the interactive analyzer, or submit your own file for analysis.