Malicious PDF — malware analysis report

Static analysis result for SHA-256 eaa52e6485015460…

MALICIOUS

PDF

88.0 KB Created: 2021-07-26 22:12:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 0fbbeef4421992549c70c78e259f32cf SHA-1: b280cced2ff2ae332138af075e9d53403c4d371f SHA-256: eaa52e648501546036b1f9fb09b956d5e83e16c718952289b1499ce006621723
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The file contains a link farm pointing to numerous domains, many of which are hosted on compromised CMS uploads, suggesting an attempt to redirect users to malicious content. While no scripts were explicitly extracted, the nature of the link farm and the detection as a trojan implies potential for further malicious activity, such as credential harvesting or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9957

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://akcjonariusz.com/UserFiles/file/82229817380.pdf In PDF document text
    • https://dmddsgn.com/wp-content/plugins/super-forms/uploads/php/files/bc8a12d52d0faed09ec8a39418106cac/56041842327.pdfIn PDF document text
    • https://healthmatters.me/userfiles/file/66377688833.pdfIn PDF document text
    • https://ivfnna.gr/wp-content/plugins/super-forms/uploads/php/files/b11428469da58b384cee1bd1768b687d/90998772659.pdfIn PDF document text
    • http://boilerservis.ru/uploads/files/jiwefapupalitovaraje.pdfIn PDF document text
    • https://sellerflows.com/wp-content/plugins/super-forms/uploads/php/files/2d07395ea49457271646a8c4f7c0ae5a/70463108892.pdfIn PDF document text
    • https://www.hdontheroadnapoli.it/wp-content/plugins/formcraft/file-upload/server/content/files/160f2362610c1c---93947974316.pdfIn PDF document text
    • http://bilagroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a06b198dac8---kibisederodoge.pdfIn PDF document text
    • https://livre-art.com/ckfinder/userfiles/files/12227927953.pdfIn PDF document text
    • http://urgentcarepb.net/userfiles/file/44906202603.pdfIn PDF document text
    • http://thehawthornnyc.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d028d957ee---gorabulikepupazoj.pdfIn PDF document text
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/nits21sd9tioskv0qpr86j0tf4/fejovotuzenuze.pdfIn PDF document text
    • http://andreagarciam.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092fbe7790a1---sewutun.pdfIn PDF document text
    • http://nc2e.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160acf5738a53b---38898982525.pdfIn PDF document text
    • https://www.diktu.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608390d63f035---45490221650.pdfIn PDF document text
    • https://www.nlg.com.np/assets/ckfinder/userfiles/files/rutekemipo.pdfIn PDF document text
    • http://orvosvalaszto.hu/uploads/files/25832347122.pdfIn PDF document text
    • http://travelshops.pl/userfiles/file/77382451359.pdfIn PDF document text
    • https://sevsport.info/wp-content/plugins/super-forms/uploads/php/files/a45c42a707673c39d1e962c992f2af1c/97200349843.pdfIn PDF document text
    • http://queuemanagementsystems.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e95c73b94d---36971280636.pdfIn PDF document text
    • https://batikatravels.com/userfiles/file/jemefelepusijewawusip.pdfIn PDF document text
    • https://www.actionconstructionjax.com/wp-content/plugins/super-forms/uploads/php/files/d14b51ecee4d5b07ed8ba03de4f152f2/11240450442.pdfIn PDF document text
    • http://savalis.ru/userfiles/file/14015439606.pdfIn PDF document text
    • http://chingyi.tw/userfiles/files/24941255217.pdfIn PDF document text
    • https://quickonboarding.com/wp-content/plugins/super-forms/uploads/php/files/d2e360198a89351d99083951b25925b8/88775740782.pdfIn PDF document text
    • http://accurateverdicts.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb64db7a1d1---nevegidaruxatedej.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=how+to+connect+logitech+h600+to+mobilePDF 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_off0000f48d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF48D 10752 bytes
SHA-256: bcd824647e22c2e1bfc2ba35696490002c3a39d34fe5dafe7d11f820cc5355a6
font_01_sfnt_off00010d0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D0A 17116 bytes
SHA-256: f05c4cfecbffa7fcdff68f6e2d84bea8c8f1ae9183f9e608e3e04e2f31c26146
font_02_sfnt_off00013993.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13993 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1