Malicious PDF — malware analysis report

Static analysis result for SHA-256 f46d69e1cbd39023…

MALICIOUS

PDF

71.6 KB Created: 2021-09-01 19:24:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 440d1fc7c7ef59158812b64997d01637 SHA-1: 8371ae4466645a20c08fd9df8b2881d4df5f6494 SHA-256: f46d69e1cbd39023a5a08efd9261f764bd4eb3f73853d9b6ac7edb3fa6735d63
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links pointing to websites hosted on compromised CMS platforms, indicating a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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://carpanea.it/wp-content/plugins/super-forms/uploads/php/files/3460ed33bf61ba55a1ab53ecebe05326/2850471655.pdf In PDF document text
    • https://local-atlas.ru/userfiles/files/89572114976.pdfIn PDF document text
    • http://thefutureofgolf.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160b0e5994e55d---92933351118.pdfIn PDF document text
    • https://ckmandarin.com/uploads/62485419281.pdfIn PDF document text
    • https://fcimoveis.com/imgs/file/10217188861.pdfIn PDF document text
    • http://maxidmum.com/images/upload/fck/file/maxewus.pdfIn PDF document text
    • https://shipnhanh247.vn/asset/files/4895275127.pdfIn PDF document text
    • https://stewsites.com/wp-content/plugins/super-forms/uploads/php/files/bf84bb87a90a74258e52fbeb61d3c85d/giruxagofixe.pdfIn PDF document text
    • https://www.dyna-tech.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160f7dbab18646---wezedudedozimosixod.pdfIn PDF document text
    • http://www.kliningstroy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160b79707b19b8---17624949693.pdfIn PDF document text
    • http://drapikowski.pl/uploaded/fck_files/file/radusigofejewulizuri.pdfIn PDF document text
    • http://mirai-kankyo.com/userfiles/files/nurafosu.pdfIn PDF document text
    • https://an-professional.ru/img/files/file/kovigir.pdfIn PDF document text
    • http://hoteldazegliotorino.com/userfiles/files/tekazoboraluvo.pdfIn PDF document text
    • https://www.formwork.co.uk/wp-content/plugins/super-forms/uploads/php/files/815m1qn221pdcsqgi3ikco4clp/dagajababedula.pdfIn PDF document text
    • http://longthinhphat.net/uploads/files/83106087321.pdfIn PDF document text
    • http://alternativefitness.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160923ccaef97c---xirox.pdfIn PDF document text
    • http://www.luminicaambiental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d5114dcf284---29112478323.pdfIn PDF document text
    • http://degeninhotel.ru/admin/ckfinder/userfiles/files/rizowapudipodepa.pdfIn PDF document text
    • http://palakkadtourism.in/ckfinder/userfiles/files/ripezujo.pdfIn PDF document text
    • http://www.melloecastro.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608210ac5bd41---lovusolujaderugenesakituf.pdfIn PDF document text
    • https://cornwallstaffagency.com/userfiles/file/21614534038.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=red+nose+parrotPDF link annotation
    • 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_off0000b69b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB69B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ceb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEB2 10292 bytes
SHA-256: bd23f747ccd8bd8325392950e687c39ed37c8212fee5267e5720ad00beef8ac6
font_02_sfnt_off0000e607.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE607 16972 bytes
SHA-256: 579dd32f28300478adefff147115270dfebce8372069e369a3507e8fcffc68a2

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