Malicious PDF — malware analysis report

Static analysis result for SHA-256 c378f7ae63a310b7…

MALICIOUS

PDF

91.1 KB Created: 2021-08-16 13:53:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: cb880e8b819d2058a9f117dbbaaa3af1 SHA-1: 76b1afa5e9db93fcf37ed648b4e3e44f2220845f SHA-256: c378f7ae63a310b7b74043473b05cfb18a18e9385d25018fdd5c89f20dc52e58
156 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded URLs, many of which point to compromised WordPress sites. The ML classifier and ClamAV detection strongly indicate malicious intent. The primary function appears to be acting as a link farm to distribute traffic to potentially malicious or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

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.champcaregivers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f7a1087c90---66650521613.pdf In PDF document text
    • https://yuktogel.com/contents//files/gosonumijibok.pdfIn PDF document text
    • https://ensasoft.com.tr/wp-content/plugins/super-forms/uploads/php/files/7vu3gveujnnjjhj1ef5emu8kev/gulowofemanasenagit.pdfIn PDF document text
    • https://vdbergelectro.nl/wp-content/plugins/super-forms/uploads/php/files/8a9ac2b6cf7d9b05e69c30cd63fcbd48/24959318511.pdfIn PDF document text
    • https://diversified-nj.com/wp-content/plugins/super-forms/uploads/php/files/5e859aa8ce9c5213f72e9b9077406913/74337557127.pdfIn PDF document text
    • http://dchs1961.com/clients/871949/File/20211342599.pdfIn PDF document text
    • https://www.kadinlarsitesi.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b823c2021a0---29164098176.pdfIn PDF document text
    • https://comesa.com.pe/wp-content/plugins/super-forms/uploads/php/files/smilck3ru4k66apid7ptomtp15/kigefeganovitawijufi.pdfIn PDF document text
    • https://lakeshoresmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/j32ku00hreanh4fbukg40t0k26/77148444467.pdfIn PDF document text
    • http://gennarimaq.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160bb9c7b7b2c6---kakiwunimesujimipatipamod.pdfIn PDF document text
    • http://ctnphrae.com/ckfinder/userfiles/files/86223446322.pdfIn PDF document text
    • https://stillwaiting.org/userfiles/file/33253442492.pdfIn PDF document text
    • http://thefutureofgolf.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1607f9b75bf192---beguse.pdfIn PDF document text
    • http://mirandatutoringcentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608b41a0de7e5---sitozewem.pdfIn PDF document text
    • http://radio-salsa.com/php/rs/filesupload/file/23430698020.pdfIn PDF document text
    • http://pnmanagementsolutions.in/uploads/75891767542.pdfIn PDF document text
    • https://vinaconexmec.vn/uploads/news_file/futugokonupemelu.pdfIn PDF document text
    • http://orikon.net/Images_upload/files/mikap.pdfIn PDF document text
    • https://www.saenger-ohg.de/wp-content/plugins/formcraft/file-upload/server/content/files/160883a0a46967---23531536027.pdfIn PDF document text
    • https://www.c2commercial.com/wp-content/plugins/super-forms/uploads/php/files/29467dc73bc58779008b58ae976a8431/94620072798.pdfIn PDF document text
    • https://www.temsilcisitesi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085a4b57f924---zuzerux.pdfIn PDF document text
    • http://baanpowertrain.com/wp-content/plugins/formcraft/file-upload/server/content/files/160711b784b028---2530309946.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=what+is+a+real+world+example+of+inductive+reasoningPDF 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_off0000fcaf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCAF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000114c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114C6 11412 bytes
SHA-256: ccacdc259c8ece41b130731010cee5b991ef6fd4d044d7ae20c597577359eb65
font_02_sfnt_off00012f6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F6A 17296 bytes
SHA-256: 2c3564ca28bf3014bdc03c7824726bd10f3c0e84945174a504302d081d1ef354

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