Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7dc9f4551f4efab…

MALICIOUS

PDF

77.4 KB Created: 2021-06-29 06:08:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 9fb29d029a6e0587446afd5a6e22522c SHA-1: bb460309ad15b7d6721e03d333ea36ce4a84eeba SHA-256: d7dc9f4551f4efabb2281d12e1d8657345a9ed25bf30313e7acf143d3bbd9c50
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It functions as a link farm, directing users to multiple external websites, many of which are hosted on compromised CMS platforms. The presence of numerous links and the use of UTM parameters suggest an attempt to drive traffic for malicious purposes, likely phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

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://egyiksem.hu/uploads/file/sewexenejefunebeguwoxafe.pdf
    • https://space1500.com/wp-content/plugins/super-forms/uploads/php/files/1f7565f48bb653c9e26416f53d7066c9/manuripelilo.pdf
    • https://www.ideaklinik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160babcfdae474---13240011197.pdf
    • http://bpabv.nl/uploadfiles/file/wifijobifipunolovozelokin.pdf
    • https://www.asahinadigital.com/wp-content/plugins/super-forms/uploads/php/files/ocf118crgsemvj77urerjsojhq/wipujupofawinubotutavo.pdf
    • http://catherine-massage.com/ckfinder/userfiles/files/20169230228.pdf
    • https://www.escon.it/wp-content/plugins/super-forms/uploads/php/files/2d35574c8c3499d08ea9d9962c99bd43/zozowizixufebefep.pdf
    • http://foire-fromages-et-vins.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fdf70f0d05---fawebuwik.pdf
    • https://www.olympusnorge.no/wp-content/plugins/super-forms/uploads/php/files/i6m9j9ve18pg0117472hnh5eqv/vorugis.pdf
    • https://livingcircles.ch/wp-content/plugins/formcraft/file-upload/server/content/files/16078612e0b32a---46809650419.pdf
    • http://islandpointfl.com/userimages/21492184963.pdf
    • http://amfmeg.org/wp-content/plugins/formcraft/file-upload/server/content/files/16072fca5196f2---nenidelef.pdf
    • http://compie.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a15d503a450---nimukineze.pdf
    • http://aarogyamedico.com/userfiles/file/favakulabilod.pdf
    • http://heilpraxis-pankow.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608e3e4379558---3978518809.pdf
    • https://www.higher-energy-trampolineclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/160822ed2607da---7376630707.pdf
    • http://lavera.it/wp-content/plugins/formcraft/file-upload/server/content/files/160ad05669e743---29872000730.pdf
    • https://gresathouse.com/wp-content/plugins/super-forms/uploads/php/files/d286ced217fc2f010d57edfbbfe124e4/tulufifoneralo.pdf
    • http://braintradingbcn.com/wp-content/plugins/super-forms/uploads/php/files/c3e0f2bc401784381358ca7bc6f53191/wokedejalivewivekigif.pdf
    • https://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/d3282aa26e63696855cf6e077f08f8d6/xujifazajonejate.pdf
    • https://www.ltgpartners.com/wp-content/plugins/super-forms/uploads/php/files/adc746ac07856a4552a4fdccbe4cf701/46806562308.pdf
    • http://mountmedpharmacy.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160729928c61b5---1523877633.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=jeremy+allen+white+law+and+order
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cbfa.bin
60a883335998b469432ed4b407b7331a5efa2f17cc57d8b30d4d0b219cb6469b
pdf-font-stream PDF embedded font (sfnt) at offset 0xCBFA 16964 bytes
font_01_sfnt_off0000f890.bin
c4e838ca76d8a011f41fc4574d4f4dacca064ebc6d3f1f9b31f19a1f4505a425
pdf-font-stream PDF embedded font (sfnt) at offset 0xF890 10536 bytes
font_02_sfnt_off0001106d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1106D 16792 bytes