Malicious PDF — malware analysis report

Static analysis result for SHA-256 d970c51f3bf5d223…

MALICIOUS

PDF

95.4 KB Created: 2021-07-07 12:33:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 76ada97f64b346a9c14f4b1610f10be3 SHA-1: 7eb3513919fa190c2c6ab6274a8a6d88d005d0ff SHA-256: d970c51f3bf5d2238e329fae00130efe2977fed7337891f093af6215a629f966
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was identified as malicious by ClamAV and an ML classifier. It functions as a link farm, containing numerous URLs pointing to compromised WordPress upload directories and other potentially malicious sites. The presence of these links suggests an attempt to lure users to external resources, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://mfplus.ba/wp-content/plugins/formcraft/file-upload/server/content/files/1609a30c838e18---wagenibusadukefotewexofes.pdf In PDF document text
    • http://medi-sen.com/files/files/39360017991.pdfIn PDF document text
    • http://windcampus.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cb1ce3057a7---sufupegu.pdfIn PDF document text
    • http://sun-eko.eu/files/file/lotabatezowofoluva.pdfIn PDF document text
    • http://ifaistos.reality.gr/~triantaf/images/file/notepiru.pdfIn PDF document text
    • http://www.anjhimayath.com/upload/file/sajigebape.pdfIn PDF document text
    • http://tecresconsolidamentorestauro.it/fck_data/file/16017861610.pdfIn PDF document text
    • http://manisafar.com/basefile/marcosafarir/files/20681211494.pdfIn PDF document text
    • https://www.glasswindowequipment.com/wp-content/plugins/super-forms/uploads/php/files/b3ffa084acecad06d5ee5d70f6d76218/melozutewikoxivum.pdfIn PDF document text
    • http://mountmedpharmacy.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160ba844de5270---wakex.pdfIn PDF document text
    • http://www.empresasdelimpeza.info/wp-content/plugins/formcraft/file-upload/server/content/files/16072e3c887e64---63749745598.pdfIn PDF document text
    • https://minutesnap.com/wp-content/plugins/super-forms/uploads/php/files/b83fec2465dad5af9ab63fb4e408b1dc/43638102869.pdfIn PDF document text
    • https://eatorhours.org/e-bussiness/fckimages/file/wodavine.pdfIn PDF document text
    • https://gulceoyunlar.com/calisma2/files/uploads/sekotijarutarovuven.pdfIn PDF document text
    • https://nationalcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ebe55575be---21980445938.pdfIn PDF document text
    • https://xn----8sbaavnccwq4am.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/d750a56f883eb99c9eb773dfb83bee03/gevavebelusi.pdfIn PDF document text
    • http://alisawedding.com/upload/users/files/12222483728.pdfIn PDF document text
    • https://trellisdundee.com/wp-content/plugins/super-forms/uploads/php/files/66be53651b888824cb877e1d82b5c735/rurifosidazizopim.pdfIn PDF document text
    • http://pinxedien.net/upload/files/wimejivor.pdfIn PDF document text
    • https://www.diktu.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d3041e57b1---wonepupuwebipakubi.pdfIn PDF document text
    • https://arichaindia.com/userfiles/file/makigadesutowalupaw.pdfIn PDF document text
    • http://a-range.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160758714807b1---sasasuwesa.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=traumatic+stress+examplesPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001129f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1129F 10476 bytes
SHA-256: f82d6f944f26613943d755015fcf60d81acd3eaa7472b8b1ad02ead3391e7a43
font_01_sfnt_off00012a7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A7B 17708 bytes
SHA-256: 63632ee6b1e3b8f541a10a35ea6eebc2f6a94ee55d172af8d2cbfa982b57e6c0
font_02_sfnt_off00015890.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15890 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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