Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca80d6e1f910f75e…

MALICIOUS

PDF

91.7 KB Created: 2021-06-09 23:16:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: baa509ce06dda54e4865cd29d9f4456d SHA-1: 5de0e8aff4fb9c188d8ff7a3c88f6696ad81b291 SHA-256: ca80d6e1f910f75eacb3815f3b83019404f18d0deb8954af1d1f0f144a292a91
164 Risk Score

Malware Insights

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

This PDF document exhibits characteristics of a phishing lure, as indicated by the 'SE_DOWNLOAD_BUTTON' heuristic and the numerous external URLs pointing to compromised CMS uploads and disposable hosting. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to trick users into downloading further malware. No scripts were extracted, but the document's structure and embedded links are designed to facilitate a malicious download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://wastran.ru/uplcv?utm_term=123movies+frozen+ii PDF link annotation
    • https://goldenparadisestsimons.com/wp-content/plugins/super-forms/uploads/php/files/593a96d337e8e682ee59ae4bad443333/xamof.pdfIn PDF document text
    • https://vnsteeldetailing.com/UserFiles/files/jixebewufanademon.pdfIn PDF document text
    • https://athensviptour.com/wp-content/plugins/super-forms/uploads/php/files/15804c87cd685922fcca6384cd3e7f91/27369102810.pdfIn PDF document text
    • https://urbanplace.me/wp-content/plugins/super-forms/uploads/php/files/778d0ef66309a37abe25ffcd3cf2d295/90175143406.pdfIn PDF document text
    • https://swimproject.eu/wp-content/plugins/super-forms/uploads/php/files/74bb493099ad01f31eaf57fabe6f254b/3353467973.pdfIn PDF document text
    • https://sipare.com.ar/wp-content/plugins/super-forms/uploads/php/files/0lsieg051rdihc8udc2mi9j14c/80851931801.pdfIn PDF document text
    • https://www.kunapak.com/wp-content/plugins/super-forms/uploads/php/files/tetq45brnv9rs30fg7hrjql713/81370337313.pdfIn PDF document text
    • http://www.rebranded.tv/wp-content/plugins/formcraft/file-upload/server/content/files/1606fd940f1cb7---1922378188.pdfIn PDF document text
    • http://ophirtonhotel.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160714a8f1d208---mupelize.pdfIn PDF document text
    • http://a-range.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160856a6755ed9---xuwimuviwagajadevonu.pdfIn PDF document text
    • https://ecomassage.pt/wp-content/plugins/super-forms/uploads/php/files/3ivis547a9r6buq1do0ejb91vc/84414016276.pdfIn PDF document text
    • http://donauwell.at/userfiles/file/zokukavud.pdfIn PDF document text
    • http://a-range.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16074ba89d1f56---zadexifodegenikemorolu.pdfIn PDF document text
    • https://earthchartercities.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608dec7fac2fb---8954613575.pdfIn PDF document text
    • http://www.luminicaambiental.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608562c4d625c---takaxuboma.pdfIn PDF document text
    • http://www.leesii.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076190daf38a---37685260647.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://scripts.sil.org/OFLIn 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
font_00_sfnt_off0001077f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1077F 3808 bytes
SHA-256: 42dec91e9b709a313b481b31cbe628286a926af9e4dcdbc86aedd46559b85f76
font_01_sfnt_off000114fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114FE 5036 bytes
SHA-256: 033656f1548c435844c98c7117aa9930de27aae4c053b8b3172bd48e35a04b0d
font_02_sfnt_off00012621.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12621 11360 bytes
SHA-256: 57b93a5ab3a596f5e6ec209dc0b4074df654e844ace4faf90a66e6065d63334b
font_03_sfnt_off00014d26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14D26 16096 bytes
SHA-256: eab4fc68ea1cfcd8ec5a925895cdc469091649897b69073087a5be8a06e348ab

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