Malicious PDF — malware analysis report

Static analysis result for SHA-256 ece690cc37fcde83…

MALICIOUS

PDF

83.9 KB Created: 2021-08-07 21:57:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: b69fcf381ae78b7ace90516c578be581 SHA-1: 467abf1236aed4033f9fa05ae95647bbd02e888b SHA-256: ece690cc37fcde83f75b385199e85f26c1613f8f8b6ee57a9c919b70b7056800
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains numerous external URIs, many of which point to compromised CMS uploads or disposable hosting, suggesting a link farm designed to redirect users. The presence of embedded URLs and the overall structure indicate an attempt to lead the user to malicious content, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://huntic.ru/uplcv?utm_term=la+voce+narrante+volume+2+pdf PDF link annotation
    • http://womensmentalhealthmd.com/clients/9/9a/9a9ccad1be43d50cbc9928f06550b956/File/76442520295.pdfIn PDF document text
    • http://eva.am/files/874fdbb67a8cd5d7.pdfIn PDF document text
    • http://alternativefitness.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160ba5b497845a---72775686999.pdfIn PDF document text
    • http://realestatemiami.com/userfiles/files/mitipukajiw.pdfIn PDF document text
    • http://beijingxinzhi.com/userfiles/file/20210701052527_335268471.pdfIn PDF document text
    • https://betentour.com/sites/default/files/file/ruxumeziluwagezimepa.pdfIn PDF document text
    • http://www.kilincsweb.hu/fileok/file/lukuburib.pdfIn PDF document text
    • http://avandcie-automation.com/ckfinder/userfiles/files/8759925839.pdfIn PDF document text
    • http://www.trafikyaren.com/wp-content/plugins/super-forms/uploads/php/files/gr3bcv0ek6f5jt2epem3k8s451/96183918335.pdfIn PDF document text
    • https://izharfoster.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e07359a4bb1---babuzuwejeb.pdfIn PDF document text
    • http://plenar.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160b77c724a1df---nizomubifopujal.pdfIn PDF document text
    • http://ebiocell.com/uploadfile/file///2021071521021330.pdfIn PDF document text
    • https://cutletsmeat.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079485a6274c---zatesaridifojazuvin.pdfIn PDF document text
    • https://memoservicesrl.it/file/4785295855.pdfIn PDF document text
    • http://ac-kenigsberg.ru/files/file/zadovokiwuw.pdfIn PDF document text
    • http://socialbomjesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160f3f96f47274---wusotizetefaruvubaxubuj.pdfIn PDF document text
    • https://selectwifi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090d364b6cea---63395646882.pdfIn PDF document text
    • http://osc-pribor.ru/products_pictures/file/52465532835.pdfIn PDF document text
    • https://maloneslandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a578c57d3dd---luligepawizi.pdfIn PDF document text
    • http://stopasbestos.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160c2bb61a1e35---zojol.pdfIn PDF document text
    • http://coumert.com/images/file/momatezamabilifipoxe.pdfIn PDF document text
    • http://petukmahaaaraj.com/userfiles/file/89761660423.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_off0000de69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE69 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f680.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF680 10764 bytes
SHA-256: 5c981733624737fda03add40112db311f095964096828b051a94cebba8c5b5e9
font_02_sfnt_off00010f55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F55 18816 bytes
SHA-256: a41a65972995a1e1f24b8c37db1916ecf7e626e67e3098db88245b5ab3ca8f2f

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