Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc4d48eff2ec6a7c…

MALICIOUS

PDF

89.7 KB Created: 2021-09-04 03:27:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 486ba651fc2e8e9e88f02d7d3eab7b6a SHA-1: 99804f8561c40963fd3482ebeb25bb181760b593 SHA-256: cc4d48eff2ec6a7c6d7382e1cf94af4fadb250b793c9e1afb9219fac2c0c6ad4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected by ClamAV as Pdf.Phishing.Trojan and flagged by an ML classifier, indicating malicious intent. It contains numerous URLs pointing to compromised WordPress sites, suggesting a link farm or redirection mechanism. The presence of PDF-specific heuristics like 'PDF_SEO_DISPOSABLE_LINK_FARM' further supports the conclusion that this PDF is used to distribute malicious content or phish users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://charqueadaboavista.com.br/wp-content/plugins/super-forms/uploads/php/files/521efa67d24eb9fc2aad8e56820d4557/jofudokemitadedomona.pdf In PDF document text
    • https://janeunchained.com/wp-content/plugins/super-forms/uploads/php/files/auqel2abfbdjn18uuqri1vsvti/fuzezukipazezodonal.pdfIn PDF document text
    • https://picinterior.com/ckfinder/userfiles/files/zamunokonovajov.pdfIn PDF document text
    • http://dodici12.ru/wp-content/plugins/super-forms/uploads/php/files/c32a3q80c0hvc3dlg0bldhnim3/bizovifojiwov.pdfIn PDF document text
    • http://aleeblog.com/wp-content/plugins/super-forms/uploads/php/files/knfvo5vi6dlurq170ufq5lo941/8481995032.pdfIn PDF document text
    • https://www.conkite.com/wp-content/plugins/super-forms/uploads/php/files/046ed2bb7f767bcb01ec1fc4aba9fa82/kijene.pdfIn PDF document text
    • https://kindliving.org/wp-content/plugins/super-forms/uploads/php/files/tmp/zixovukofegasozomid.pdfIn PDF document text
    • https://www.revistadefiesta.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b3a2f36ab2---71930721766.pdfIn PDF document text
    • https://www.drserapkagan.com/wp-content/plugins/super-forms/uploads/php/files/k2vqe1t31nj4c3tlgdknfavp2u/89068989630.pdfIn PDF document text
    • https://cuisinescartier.ca/upload/editor/file/86523712304.pdfIn PDF document text
    • https://deniz-sogutma.org/img/userfiles/file/14317822395.pdfIn PDF document text
    • https://soft-print.pl/app/webroot/media/files/88102466983.pdfIn PDF document text
    • http://psycare-spb.com/userfiles/file/90161134482.pdfIn PDF document text
    • http://www.lentilles-progressives.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160afa97341292---gumikobaxi.pdfIn PDF document text
    • http://maryalo.com/userData/board/file/57117701519.pdfIn PDF document text
    • https://ldoris.com/upfile/files/20210722042952.pdfIn PDF document text
    • http://3dprofi.net/images/uploads/file/wawapenujigavalilikonup.pdfIn PDF document text
    • http://phs60sand70sdecadesreunion.com/clients/880504/File/vugos.pdfIn PDF document text
    • http://portalcom-b2b.es/img/user///file/_0749903001624057699.pdfIn PDF document text
    • http://smepil.com/ckeditor/userfiles/files/73801078278.pdfIn PDF document text
    • http://www.sg-callenberg.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609dcbe83dffc---tizufe.pdfIn PDF document text
    • http://www.nanodrywash.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0ed72a52d0---26748867841.pdfIn PDF document text
    • http://www.holderit.com/wp-content/plugins/formcraft/file-upload/server/content/files/161161230c9ead---44890899027.pdfIn PDF document text
    • https://satybharat.com/ci/userfiles/files/70093738337.pdfIn PDF document text
    • https://kuzeyilac.com/resimler/files/nefokezexigetagedasagu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=trainingsplan+muskelaufbau+pferd+pdfPDF 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_off0000f446.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF446 20300 bytes
SHA-256: 4695a455e914155692e6fd709c0668d18cf7f687dfe8ab19c5a9d11731c0c11d
font_01_sfnt_off000127ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127AB 10920 bytes
SHA-256: e55dde18a5786bb7476ebe136edcd850327c56ac6b3bcf7b4868b43e680c92d7
font_02_sfnt_off00014072.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14072 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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