Malicious PDF — malware analysis report

Static analysis result for SHA-256 206d46539fd76414…

MALICIOUS

PDF

84.0 KB Created: 2021-06-11 07:31:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 3ae23ce809d7782d3c835623a0a9c920 SHA-1: 2fefc664453ad0e53ba85148d06bef1913f05236 SHA-256: 206d46539fd7641461b695c19ca6dfd02ec74bcf14e8c406989e2a74959e04e7
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://queure.ru/uplcv?utm_term=reading+comprehension+pdf+grade+1 PDF link annotation
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/7m7kusbqs9kncklodpli4klb83/15824424358.pdfIn PDF document text
    • http://www.marcado.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160ba977ec299a---sotezevaligutilotubosa.pdfIn PDF document text
    • https://tedvandergulik.nl/userimages/file/wejij.pdfIn PDF document text
    • https://www.enviedecrire.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c4f5e4face---53934749397.pdfIn PDF document text
    • http://www.kidnuri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2b918edf2e---wutofu.pdfIn PDF document text
    • http://www.franklinwebdesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6224f5dce7---sorenadabaj.pdfIn PDF document text
    • https://balance-global.com/wp-content/plugins/super-forms/uploads/php/files/upi75j47227fdhn2c4f85jfbf9/beludasodotejowodusu.pdfIn PDF document text
    • https://doellefjelde-mussemarked.dk/images/newsmail/file/kifimen.pdfIn PDF document text
    • http://www.patricktennis.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160759433bdc89---67999329092.pdfIn PDF document text
    • http://jrmhandling.nl/upload/file/46338133134.pdfIn PDF document text
    • http://www.rec39.ru/wp-content/plugins/super-forms/uploads/php/files/9ae0720d3c2aa1121c952df047c542c4/35211319295.pdfIn PDF document text
    • https://perleyparish.org/wp-content/plugins/super-forms/uploads/php/files/3d64fc1a67e72d7ebce2dd438d767d87/50982090838.pdfIn PDF document text
    • https://maidintown.co.uk/wp-content/plugins/super-forms/uploads/php/files/bef267300aaccad8396f5e6dae30c05b/likek.pdfIn PDF document text
    • https://sidexsideaudio.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085db0f6a511---34638634270.pdfIn PDF document text
    • https://mytutr.com/wp-content/plugins/super-forms/uploads/php/files/dc06bfd52fe08685c670227492755536/48573747506.pdfIn PDF document text
    • http://chsbicentennialclassof1976.com/clients/c/c2/c283bfa2537a82fb79a670aa087b4bd4/File/83032079216.pdfIn PDF document text
    • http://opalbiosciences.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b803c74b80---24520853970.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_off0000ffa8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFA8 5304 bytes
SHA-256: f45519f8ec1a622fcc38284e154b581e3928ee2640e56b713af2bbd06d0649b9
font_01_sfnt_off0001117f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1117F 10396 bytes
SHA-256: 14a27e706a671af668e07d0c2369cbdbadb98205c18e2a884e86d4ce6da1c4b2
font_02_sfnt_off000134da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x134DA 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

Open this report in the interactive analyzer, or submit your own file for analysis.