Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ea84285e6276a7c…

MALICIOUS

PDF

87.0 KB Created: 2021-08-23 11:30:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: fc0d542baceff0943624d29f52e1eae2 SHA-1: 8aeb0da43f201769e9dca65b822f6f74aa0f9cc7 SHA-256: 0ea84285e6276a7c9d8a2f8f11611686f62a8afd72ecbbbf73b2ea660cf6d119
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, many hosted on compromised WordPress sites, suggesting a link farm or phishing lure. The presence of a 'download button' heuristic and ClamAV detection as 'Pdf.Phishing.Trojan' strongly indicates a malicious intent to trick users into downloading further malware. No scripts were extracted, but the overall structure and heuristics point to a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

Heuristics 7

  • 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.
  • 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://infrive.ru/uplcv?utm_term=sports+certificate+template+free+download PDF link annotation
    • https://movesforfree.com/wp-content/plugins/super-forms/uploads/php/files/koiu9hiv0r5c3rrbkntq1cquq2/nerokoziwed.pdfIn PDF document text
    • http://cl-pub.com/files/files/37938968758.pdfIn PDF document text
    • https://dermo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a039121429---62454217356.pdfIn PDF document text
    • http://www.teeintact.com/admin/fckeditor/editor/filemanager/connectors/php/img/file/fizepesisusitixezamaled.pdfIn PDF document text
    • http://ar-intl.net/wp-content/plugins/super-forms/uploads/php/files/rljnlflg9368ip8d9bsotrqup7/juvosusele.pdfIn PDF document text
    • https://teplitsyoptom.ru/wp-content/plugins/super-forms/uploads/php/files/9489154d4214249176339f5c2b62dee1/dakadote.pdfIn PDF document text
    • http://livestreaming.group/wp-content/plugins/super-forms/uploads/php/files/qndio3bu2qn6j11n2nftsgh4064ib4i6/2346565499.pdfIn PDF document text
    • http://maciejabramowicz.pl/upload/files/file/6624654804.pdfIn PDF document text
    • http://xn--or3bi2da319p.com/upload/fckeditor/file/varijodabamonusorori.pdfIn PDF document text
    • https://aartipalette.com/userfiles/file/jorunufufa.pdfIn PDF document text
    • https://marwaautorepair.com/nbloom/fckuploads/file/fixirezenezeluwilu.pdfIn PDF document text
    • http://graficaeformazione.it/userfiles/file/bitozo.pdfIn PDF document text
    • http://bpabv.nl/uploadfiles/file/femokotifosemogaloruje.pdfIn PDF document text
    • http://cooper1972.com/clients/b/b4/b451ebb09e7e0345645526f893d9a49e/File/94825139183.pdfIn PDF document text
    • http://linker-apps.com/files/96879185882.pdfIn PDF document text
    • https://mudateconmigo.cl/wp-content/plugins/super-forms/uploads/php/files/327b3577f34b027b37a9739de52532e6/13846710639.pdfIn PDF document text
    • https://rocksoliddesigns.biz/userfiles/file/gapuwavomijaza.pdfIn PDF document text
    • http://eske.hu/wp-content/plugins/formcraft/file-upload/server/content/files/1606c743b10fc4---19885223728.pdfIn PDF document text
    • https://carrieres-pierre.com/userfiles/file/ranoguginususob.pdfIn PDF document text
    • http://genbreedpublisher.com/files/upfiles/file/bufinivimovegimojageni.pdfIn PDF document text
    • https://ilexgold.com/app/webroot/files/userfiles/files/barepesatalexul.pdfIn PDF document text
    • http://claudiodauelsberg.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607e74dae0c78---luzozezamumadapoti.pdfIn PDF document text
    • http://climacom.eu/userfiles/files/mijipogivosanojojavive.pdfIn PDF document text
    • https://www.hediyevideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d18d68ddf30---34119679981.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_off0000ef8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF8A 10944 bytes
SHA-256: a0b42689abce71483a29e9d2abc6e2c8078091df32e0a2afa50a5a0548af70cc
font_01_sfnt_off000108e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108E9 17064 bytes
SHA-256: 7959b891c2109438866db60d9dafccd05b6b912f08ca9cb244967fa1010fa897
font_02_sfnt_off00013542.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13542 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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