Malicious PDF — malware analysis report

Static analysis result for SHA-256 b8ed4a605af3eda7…

MALICIOUS

PDF

92.7 KB Created: 2021-06-27 13:17:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: b923163dec73712248810b58ce8b326f SHA-1: fd402a2c9ddf4f8a031b0bf5af780ab6374775e8 SHA-256: b8ed4a605af3eda7329c2058e09fc6fd2e0b4ac43875180994e04446ae5fa0c3
156 Risk Score

Malware Insights

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

The PDF contains a large number of links pointing to various websites, many of which are identified as compromised CMS uploads. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or to serve further malicious content. The presence of a link farm on disposable hosting further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://www.ikedatosou.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607aa56c9223b---99381388200.pdf In PDF document text
    • http://mmbc.cz/_data/user_files/file/xelivobawepetefim.pdfIn PDF document text
    • http://ylpcl.com/ckfinder/userfiles/files/14017112621.pdfIn PDF document text
    • https://xn--64-mlcufjjaii0l.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/9810df9f755a780f499fea22f4f7f550/58955495938.pdfIn PDF document text
    • http://mfplus.ba/wp-content/plugins/formcraft/file-upload/server/content/files/160cbe6c719cd3---5371783386.pdfIn PDF document text
    • https://pollackmihalyiskola.hu/ckfinder/userfiles/files/bokufoziture.pdfIn PDF document text
    • http://akkoryazilim.com/userfiles/file/xugazelojisusonewageweduk.pdfIn PDF document text
    • http://mouaumfb.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608499e8e8b85---dedigexokadamorunefam.pdfIn PDF document text
    • http://www.johnknox.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160acce341133d---vigaxiwodoxofofujat.pdfIn PDF document text
    • http://asiavent.com/UserFiles/file///rugebixapiwuzaka.pdfIn PDF document text
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/7e75be86183eded1525191ee22ed2b5d/baretuguzogaxulire.pdfIn PDF document text
    • https://www.numberoneporthill.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1606cf68844261---82652859706.pdfIn PDF document text
    • http://premiumresourcing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160baf2f751b2c---80054294626.pdfIn PDF document text
    • https://avenirpourtous.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160b31294b1ce8---nosadunuxewawixavek.pdfIn PDF document text
    • http://steclotildehorton.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160be9a127161e---73851199524.pdfIn PDF document text
    • http://stoewebdesign.no/userfiles/file/78770845713.pdfIn PDF document text
    • http://hillhouseclassof1961.com/clients/c/c9/c9b049383fb65e98d0a4dcab6c176392/File/xodeze.pdfIn PDF document text
    • http://www.unidacardoso.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160d625bfb8538---jutepabokuxafulupof.pdfIn PDF document text
    • http://solartgaleria.hu/images/file/68972608339.pdfIn PDF document text
    • https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/7dd11fca6c48a5f71c6f5085c413d8c2/10343125778.pdfIn PDF document text
    • https://www.couleurs-et-jardin.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607035914e79f---votikaxej.pdfIn PDF document text
    • https://zionapostolicministries.org/uploads/file/12258737083.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=commercial+rearing+of+silkworm+supplementing+farmers+income+isPDF 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_off00010678.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10678 17168 bytes
SHA-256: 964ba9e99a432bc3d0b853652e295d4d4acf391626b4b54c64f8743615695e21
font_01_sfnt_off000132f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132F4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014b0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14B0B 11132 bytes
SHA-256: 5cc0b8fea0797fbe66351245eef0ad8b52bf0962385582768f45dd17270f998d

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