Malicious PDF — malware analysis report

Static analysis result for SHA-256 9147108894a1ba29…

MALICIOUS

PDF

81.8 KB Created: 2021-09-03 15:35:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 0c47f28c81e10daa9dd2d86382c6894b SHA-1: fbcfff69d96b210beaf303e7d5941374fcf3128d SHA-256: 9147108894a1ba290892057fe0c0dfedfd9ddba27d828a5313a4298131306cef
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, containing numerous URLs pointing to compromised WordPress upload directories and other disposable hosting. These links likely lead to further malicious content or phishing pages, aiming to exploit users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://medvor.ru/uplcv?utm_term=indikasi+pungsi+asites+pdf PDF link annotation
    • https://asiaviews.org/wp-content/plugins/super-forms/uploads/php/files/2h1jorric2n7ku38ft26lnltl3/55920894644.pdfIn PDF document text
    • https://ambientltg.com/wp-content/plugins/super-forms/uploads/php/files/6a390111c8db14edd0089048ee1d0808/49288768550.pdfIn PDF document text
    • http://goldenpeak.it/userfiles/files/dominunevufenafu.pdfIn PDF document text
    • http://www.marsagri.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090ae7261a8c---visapugitixexobubupoxatov.pdfIn PDF document text
    • https://esz.jp/img/editor/files/sosijutagazirutevasokutu.pdfIn PDF document text
    • http://www.thelawchamber.com/wp-content/plugins/formcraft/file-upload/server/content/files/160792ec5404f4---gudutef.pdfIn PDF document text
    • http://www.luminicaambiental.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609bb88380fa9---sagimu.pdfIn PDF document text
    • https://leicht-spb.ru/wp-content/plugins/super-forms/uploads/php/files/338ff6d926e89b24cf3bcf88cc64ec4a/53812000318.pdfIn PDF document text
    • http://lblussana.it/images/file/pupikifofulevo.pdfIn PDF document text
    • https://pass-eco-energies.com/ckfinder/userfiles/files/52077169214.pdfIn PDF document text
    • http://phuocthuan.vn/images/pic/file/worutuwuxipabojopulu.pdfIn PDF document text
    • https://szabobuszrendeles.hu/files/files/55810450636.pdfIn PDF document text
    • https://inprovit.com/ckfinder/userfiles/files/83595996400.pdfIn PDF document text
    • http://inezorviskids.com/clients/37546/File/6629568915.pdfIn PDF document text
    • http://multiseal.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/16098d3a1dee8d---vepamofamiduwig.pdfIn PDF document text
    • https://izr.fr/files/fofavusezidoza.pdfIn PDF document text
    • https://namastehealth.in/wp-content/plugins/super-forms/uploads/php/files/9agldlme6mbvmbnvmtj51jcq8o/11294171376.pdfIn PDF document text
    • http://familycrawford.com/clients/3/31/31f1fdc6e90c562b7578e9c437f7c1bf/File/35291120358.pdfIn PDF document text
    • http://biotop-zamosc.pl/userfiles/file/sagiwegowuxevu.pdfIn PDF document text
    • http://wccflooring.com/userfiles/files/kemexitobufatupikefowi.pdfIn PDF document text
    • https://revapackers.com/wp-content/plugins/super-forms/uploads/php/files/5i6ovi5s8l0d9n7frj022a0pra/fagitilinezepafanezipaziz.pdfIn PDF document text
    • https://psihodesk.ro/ckfinder/userfiles/files/45892623278.pdfIn PDF document text
    • http://vervesimuhub.com/userfiles/file/todizabibadibonorowo.pdfIn PDF document text
    • 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_off0000dae4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAE4 17680 bytes
SHA-256: 31852ed00997e7f5458513e44151452c0d03969f420d294163fb533dcb9eebee
font_01_sfnt_off000109b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109B1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000121c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121C8 10548 bytes
SHA-256: 489849885e30fdf765081fa81f4f7cb4bebbaa063fc86f5e99bc4d25bce946b9

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