Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e0797848aa8dc90…

MALICIOUS

PDF

72.3 KB Created: 2021-09-05 05:29:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 72be30d3d8a4acf973ce1079daddb357 SHA-1: 25e886a734c36a3d12c76efc9acf769b6efba093 SHA-256: 2e0797848aa8dc90c3a2289c072a8aad7e5537c17f94f71820f0e1bec41c35f0
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains numerous links pointing to compromised WordPress sites and other disposable hosting, suggesting it functions as a link farm to distribute malicious content or phish for information. The presence of multiple external URIs and link farms indicates a clear intent to redirect users to potentially harmful external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9950

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://ketchas.ru/uplcv?utm_term=jumbled+up+sentences+worksheets+for+grade+2 PDF link annotation
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084475258954---safozebinugun.pdfIn PDF document text
    • http://nnk.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160a78bfecad12---ranoxajebo.pdfIn PDF document text
    • http://u15.ch/ckfinder/userfiles/files/51106978329.pdfIn PDF document text
    • http://countrysquirefoods.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083e25ea537b---81565756087.pdfIn PDF document text
    • https://natyabio.com/uploadfiles/10706977209.pdfIn PDF document text
    • http://tuzvedo.hu/elemek/file/98656402328.pdfIn PDF document text
    • https://askopenko.com/wp-content/plugins/super-forms/uploads/php/files/66563f5e3c8f7125ce3d34d2330af167/lagirunudobejolaxexuv.pdfIn PDF document text
    • https://12shio2.com/contents/files/58224994566.pdfIn PDF document text
    • https://clubslotalmatriche.com/calcas/file/89875075882.pdfIn PDF document text
    • http://www.absolutecateringla.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bfaab75c45e---84459845492.pdfIn PDF document text
    • http://easyhypermarket.com/userfiles/file/nirimepagesagumufix.pdfIn PDF document text
    • http://dieta-plus.pl/userfiles/file/boxuwim.pdfIn PDF document text
    • http://afghansolar.com/userfiles/file/tabuxegidavegenopasit.pdfIn PDF document text
    • https://skazkavdom.com/wp-content/plugins/super-forms/uploads/php/files/562d183c8d00e89ea84643b1077f5115/rixatopojegifa.pdfIn PDF document text
    • https://petroblend.com/wp-content/plugins/formcraft/file-upload/server/content/files/160873e29d5768---suwizuxefumijepiretupata.pdfIn PDF document text
    • https://mannoorpally.com/uploads/file/33412823480.pdfIn PDF document text
    • https://www.beachesbrewing.com/wp-content/plugins/super-forms/uploads/php/files/71acb5592b369b7ccfb9bb72a093503a/votitudogodijanolox.pdfIn PDF document text
    • https://mcrlclient.com/ckfinder/userfiles/files/84699924708.pdfIn PDF document text
    • https://www.ideaklinikbakirkoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133a58e705bc---napuzukubililiwukijigib.pdfIn PDF document text
    • http://waypl.pl/upload/File/63406291638.pdfIn PDF document text
    • https://www.avantagesapp.com/uploads/files/58794953336.pdfIn PDF document text
    • http://wami.cc/data/files/78229427729.pdfIn PDF document text
    • http://www.zav-mito.si/wp-content/plugins/formcraft/file-upload/server/content/files/160d5d12309472---42542811371.pdfIn PDF document text
    • http://nonstopsushi.com/uploads/files/43115858683.pdfIn PDF document text
    • http://thai-apsproducts.com/file_media/file_image/file/pebukerigedozizoje.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_off0000b792.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB792 15372 bytes
SHA-256: 4a434c0a5d62e72e50d915b8bdeb81e5bd3da4a8c14cb7062a5df058b7195afe
font_01_sfnt_off0000defd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEFD 11504 bytes
SHA-256: eb9f8dcc4374b58b2e34eab46bb22c3ec627c9024d0cd1bf20c82e70a7947596
font_02_sfnt_off0000f9c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9C9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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