Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ab0492690bf3abe…

MALICIOUS

PDF

78.2 KB Created: 2021-05-25 09:22:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 073fc0da84cd839a50e845ef485a5189 SHA-1: c7cb75b03ce7d1bdbe0affe4c0e42a50cd2642a9 SHA-256: 6ab0492690bf3abe3b1b1cb2d3c669e9b64a15d4b4f36b9d84902954b99c1619
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains a link farm pointing to multiple compromised WordPress sites, likely intended to trick users into downloading malicious files. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of external URIs and link farm heuristics suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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=photo+slideshow+maker+platinum+5.58+serial+key PDF link annotation
    • https://www.ppmcare.co.uk/wp-content/plugins/super-forms/uploads/php/files/9pi742ncdfmr28vnj5qpsu04oa/34000808646.pdfIn PDF document text
    • http://erfolgsapp.de/wp-content/plugins/formcraft/file-upload/server/content/files/160789abcccd03---55003686009.pdfIn PDF document text
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/8d3297b22effb1a100908d37d7bf0662/50464285770.pdfIn PDF document text
    • http://pogservice.ru/userfiles/file/guvobepixivubobideleduput.pdfIn PDF document text
    • http://www.thediethub.in/wp-content/plugins/formcraft/file-upload/server/content/files/1609c9c7bc3af5---miwigipirexulededi.pdfIn PDF document text
    • http://www.nationaalgolfcongres.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16087e02e9b7fc---66396697138.pdfIn PDF document text
    • http://ildungrice.com/fileupload/fckeditor/file/bekutujusukir.pdfIn PDF document text
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/9f947379b10a5fcf134ad982e353b245/velisulemerufizo.pdfIn PDF document text
    • http://for-rent-aalst.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ab95ae628f---pabibigepilelabakitup.pdfIn PDF document text
    • http://shmountaineering.co.uk/wp-content/plugins/super-forms/uploads/php/files/6omfta8kv7t7cpnfv9mcf80gp6/xuxasudodivorapumudutafav.pdfIn PDF document text
    • http://adabaskimerkezi.com/upload/file/nogomipifiwerisave.pdfIn PDF document text
    • https://earthchartercities.org/wp-content/plugins/formcraft/file-upload/server/content/files/160788c0bb6aa0---pisirobugol.pdfIn PDF document text
    • https://www.azembay.com/wp-content/plugins/super-forms/uploads/php/files/0ua4avm2kncgduagd14dt9b0f6/48927735785.pdfIn PDF document text
    • https://proff-doors.ru/wp-content/plugins/super-forms/uploads/php/files/7d37e5d6bb0bb859018e65f6ddabd83a/92975406423.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e2de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2DE 5688 bytes
SHA-256: 1e6fba032e36402771f88a71ba8c67863f082176e95f517f66e5db30e443f6b7
font_01_sfnt_off0000f625.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF625 12004 bytes
SHA-256: 58d8313c18316aaa6ff4d227a2d3a4cde2f45f453793bbb5b380be9e92d8f94b
font_02_sfnt_off00011da7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DA7 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e