Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ba478da13849303…

MALICIOUS

PDF

113.3 KB Created: 2021-08-05 02:05:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 382384d046ced82f4091095b21cec59b SHA-1: f3e4c7948002cac60aff57876bde212e369e8150 SHA-256: 9ba478da13849303ebf2ffd54bd6a9c433a44c8d316a27be6abbd5f9e98bd765
156 Risk Score

Malware Insights

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

The PDF was flagged by multiple heuristics as malicious, including ClamAV and an ML classifier. It contains a link farm pointing to numerous domains, many of which are hosted on compromised WordPress sites or disposable hosting. The primary purpose appears to be directing users to external, potentially malicious, content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://ptogel2.com/contents//files/dadejixaboz.pdf In PDF document text
    • http://www.k-24.com/wp-content/plugins/formcraft/file-upload/server/content/files/160718340508c7---80751687401.pdfIn PDF document text
    • http://libertyquad72.fr/userfiles/file/jitexatu.pdfIn PDF document text
    • http://branpc.in/ckfinder/userfiles/files/vufapiv.pdfIn PDF document text
    • https://www.masismarketing.com/wp-content/plugins/super-forms/uploads/php/files/504d67b7cc1abf26652d08d3154dfe2f/kanujojulusaxepo.pdfIn PDF document text
    • https://fl-forever.com/upfiles/editor/files/27223041807.pdfIn PDF document text
    • https://holzhaus-suedtirol.it/wp-content/plugins/formcraft/file-upload/server/content/files/160b1cdb22352e---34085640976.pdfIn PDF document text
    • https://creationstationdance.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ff381b7e4b---21618078756.pdfIn PDF document text
    • https://maturana.cl/upload/file/37302071289.pdfIn PDF document text
    • http://ytlcases.com/userfiles/file/28128931815.pdfIn PDF document text
    • http://baaningdoi.com/file_media/file_image/file/wizubisajulowofudapanif.pdfIn PDF document text
    • http://extracam.es/app/webroot/arxius/file/7597649843.pdfIn PDF document text
    • https://teenvolunteerdallas.org/wp-content/plugins/super-forms/uploads/php/files/f3f1ceb7b75cabf76bc41498755dc6e0/90164893075.pdfIn PDF document text
    • http://mamnonlittlesun.com/upload/files/lufakavesa.pdfIn PDF document text
    • http://myflora888.com/ck_files/files/vitenasopidol.pdfIn PDF document text
    • https://www.webplease.it/wp-content/plugins/super-forms/uploads/php/files/2hbicnqhof7at3587ue90lepq1/56483181144.pdfIn PDF document text
    • http://www.hangmandigital.com/files/file/93993754135.pdfIn PDF document text
    • http://big-blue-bus.com/pics/fotos/1/file/54284431424.pdfIn PDF document text
    • https://ag-concept.ru/wp-content/plugins/super-forms/uploads/php/files/f2a58dc4e7a594ea0d287e041b6b8e7d/52690048581.pdfIn PDF document text
    • https://bluza-shop.ru/content/File/70400805961.pdfIn PDF document text
    • http://toastwarenhuis.nl/app/webroot/files/userfiles/files/losomujalir.pdfIn PDF document text
    • http://buyo-g.net/userfiles/file/sofurirow.pdfIn PDF document text
    • https://directprocessors.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c45d7a53772---93943538060.pdfIn PDF document text
    • http://worksafeorg.com/wp-content/plugins/super-forms/uploads/php/files/mn8fi2ek1220jl5p5kv0mc8ok3/dusoje.pdfIn PDF document text
    • http://mahkotacare.com/tmr/userfiles/files/63166079238.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=mientras+por+competir+con+tu+cabello+englishPDF 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_005_off0001361d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x1361D 17676 bytes
SHA-256: 0f6f3047ee343ccf42f7895b9e477f621e1ab67d6bcca892da15d5e94f05060b
font_01_sfnt_off0001510b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1510B 11052 bytes
SHA-256: 16cbf638533444511f676cbaeb7e010c62d73abaee61e985b208c389653ed93d
font_02_sfnt_off00016a63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16A63 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off00018275.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18275 19696 bytes
SHA-256: 2ceccb3740539100a914ddb8b72990326e749cce2f3e01670f83db2bb47e5762

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