Malicious PDF — malware analysis report

Static analysis result for SHA-256 31eca82f3fd51c99…

MALICIOUS

PDF

96.0 KB Created: 2021-07-13 20:34:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 47f16314f169533e8c2dacc0b5c2b1f5 SHA-1: a6380be3018d5a3ad1af5cb9f68911196eace82e SHA-256: 31eca82f3fd51c99219e39c12bf9c649e2ae8d94b5e4eece1b99809e18122fe4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm hosted on compromised CMS uploads, pointing to multiple suspicious URLs. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to potentially harmful sites, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9920

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://philippinesroadshow.com/wp-content/plugins/super-forms/uploads/php/files/a7e2ba174212de5393cdc2f264e57cdc/lewekejixudu.pdf In PDF document text
    • http://pomocnaukowa.net/Upload/file/xoligodosadazadegufefopuv.pdfIn PDF document text
    • https://nolimitscenter.be/peausitive/images/FCKeditor/file/86466575805.pdfIn PDF document text
    • https://www.grandeprairie.org/wp-content/plugins/formcraft/file-upload/server/content/files/16081131688866---gexarupe.pdfIn PDF document text
    • http://sportschoolindex.nl/images/uploads/8652768879.pdfIn PDF document text
    • http://assytekservizi.com/userfiles/files/28546288863.pdfIn PDF document text
    • http://afghansolar.com/userfiles/file/30733766990.pdfIn PDF document text
    • https://nuregio.de/wp-content/plugins/formcraft/file-upload/server/content/files/160bf24dcdeaa2---2586943129.pdfIn PDF document text
    • http://for-rent-aalst.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b453b0ac0b---37622474621.pdfIn PDF document text
    • http://jeugdopdewetenschapsagenda.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c6778b69fcb---2548240385.pdfIn PDF document text
    • http://kraljicabih.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607111ce83e1e---32677063916.pdfIn PDF document text
    • https://koncnc.com/genelresimler/file/48542320075.pdfIn PDF document text
    • http://www.mvdisposal.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0e1f0b6d60---85625329231.pdfIn PDF document text
    • https://brusroom.com/wp-content/plugins/super-forms/uploads/php/files/b117ffc9e5396b7713e60034a3c573f4/tapebavarezeme.pdfIn PDF document text
    • http://grodgolf.com/clients/f/fd/fd83fa7079552abb47853a85229f74c1/File/modozokijoxidukokexew.pdfIn PDF document text
    • http://doks-films.com/pcms/content/file/72072542631.pdfIn PDF document text
    • https://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cffa786a6d0---juguvewejijiki.pdfIn PDF document text
    • https://heritagelogs.com/wp-content/plugins/super-forms/uploads/php/files/0rb039of9ce8kn67jk4to4v748/pafiwepasibonaged.pdfIn PDF document text
    • https://leesman.com/wp-content/plugins/super-forms/uploads/php/files/e4913b47ec73c55044e05e8d16bc9ac7/16181669699.pdfIn PDF document text
    • http://www.sandzthabapanel.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160ac3f760d124---49080051160.pdfIn PDF document text
    • https://www.ideaklinik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16072ab6702347---67269867360.pdfIn PDF document text
    • http://casaledellasignora.it/userfiles/files/fagefavalumejuzevejiwu.pdfIn PDF document text
    • https://ajwatravel.com/wheelmarine/userfiles/file/zuvajamat.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=most+reactive+family+of+elementsPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00013dab.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x13DAB 18244 bytes
SHA-256: fd798507e8453b694e0ed5e9010d7f5e1ed0f2849cd3f74cf46fb840bbdf9e68
font_00_sfnt_off0000f728.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF728 17528 bytes
SHA-256: 2e63a53aa2b207377df46a1a19a3fc245e2c96052b26fc369c70aaab4e5ade9b
font_01_sfnt_off0001252a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1252A 10668 bytes
SHA-256: 0aa803edc11f34c4624f1753cd7ecbc673611fff8aaae0280cd348b418170c92
font_03_sfnt_off00015a62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15A62 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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