Malicious PDF — malware analysis report

Static analysis result for SHA-256 fcbda004f0574719…

MALICIOUS

PDF

82.3 KB Created: 2021-09-19 02:04:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: aad2df6875bd099da76a4aa881d6ca40 SHA-1: 12a2a18dd4ffeae18c57c521841023a2b2b0ee01 SHA-256: fcbda004f0574719cae88ec85136d002d93e89d60f6c3da7ef81b4036f41031d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as a malicious PDF by ML classifiers and ClamAV. It contains numerous links, many pointing to compromised WordPress sites and disposable hosting, suggesting a link farm designed to redirect users. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicates a tactic to manipulate search engine results for potentially malicious content. While no scripts were explicitly extracted, the nature of the links and the 'Pdf.Phishing.Trojan' detection strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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 http://www.sushmitamukherjee.com/fckimages/file/josetisasek.pdf In PDF document text
    • https://thepetrichortouch.com/wp-content/plugins/super-forms/uploads/php/files/qktpegiomllf6gmq0qa6pu6hc0/96876506342.pdfIn PDF document text
    • http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/16144914f4aa91---zofiger.pdfIn PDF document text
    • https://notofthisgalaxy.com/wp-content/plugins/super-forms/uploads/php/files/nhk4fi5f8momu41c0jfen16s6p/milapajazewusitoluvo.pdfIn PDF document text
    • http://xn--80aikni6a0b.xn--p1ai/images/file/sokejopofof.pdfIn PDF document text
    • https://almudenafernandez.co/ckfinder/userfiles/Files/suvez.pdfIn PDF document text
    • http://rcmo.ru/upload/files/jutokoj.pdfIn PDF document text
    • https://laneopx.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613db502b05e9---39042993804.pdfIn PDF document text
    • https://infravoip.com/wp-content/plugins/super-forms/uploads/php/files/6a76d6abe8918fcea656bb3304f8cf60/dovizokifimofekibi.pdfIn PDF document text
    • http://monikaknoblochova.com/userfiles/file/11479688198.pdfIn PDF document text
    • http://royalgoodviewresort.com/Uploads/file/36966308652.pdfIn PDF document text
    • http://kidsjeodo.com/images/files/64528772416.pdfIn PDF document text
    • https://cupanghitam.com/contents/files/88097081486.pdfIn PDF document text
    • http://ipvoicenj.com/wp-content/plugins/formcraft/file-upload/server/content/files/161396f2ae1ea0---32098093798.pdfIn PDF document text
    • https://sipsib.ru/wp-content/plugins/super-forms/uploads/php/files/161daaf075b395a5cf6eb0d4b052b50c/78550605796.pdfIn PDF document text
    • http://drvision.org/wp-content/plugins/formcraft/file-upload/server/content/files/1613d16675c76a---vujakuliriwokana.pdfIn PDF document text
    • http://addon-colsman.somantec.net/ckfinder/userfiles/files/rugonanisaborogop.pdfIn PDF document text
    • http://naturalmis.com/userfiles/file/81372699728.pdfIn PDF document text
    • http://uat2.hkha.com.hk/ckfinder/userfiles/files/podajetasomibulabiga.pdfIn PDF document text
    • http://kommunikator.nu/demo/userfiles/file///27981064029.pdfIn PDF document text
    • http://sdv.sk/userfiles/articles/file/65723170024.pdfIn PDF document text
    • http://szyoujin.com/UploadFile/file/20210913055609665.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=dragon+ball+z+infinite+world+game+downloadPDF 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_off0000de9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE9A 10816 bytes
SHA-256: 89353f676b5791e8c4bb5ea1b83c8cff9ba31cb38c0108b1392f8c30ccccd481
font_01_sfnt_off0000f764.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF764 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010f76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F76 17136 bytes
SHA-256: fd327d1a0743a26299e5f58fd8d88d375147d5b7ee39a2cfdf3a6e758bd58f93

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