Malicious PDF — malware analysis report

Static analysis result for SHA-256 96be8457103e2cb3…

MALICIOUS

PDF

71.1 KB Created: 2021-09-11 11:17:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 491cdc745bd40c13996b85cd22cf0c19 SHA-1: fdd644a4a8ac8dc84c62c912f502a5c8233d1e8c SHA-256: 96be8457103e2cb358975ae2d63261ca9e243aab3c89df1cafdd7c2d55bdb14d
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised WordPress upload storage or disposable hosting, indicative of a link farm used for phishing or malware distribution. ClamAV detection as 'Pdf.Phishing.Trojan' and ML classification strongly support its malicious nature. The file's structure and heuristic firings suggest it's designed to lure users into clicking malicious links, likely as part of a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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 http://architettoangeli.it/userfiles/files/67394361054.pdf In PDF document text
    • http://kondicionery-domodedovo.ru/upload_picture/file/garejamanemuwowunodi.pdfIn PDF document text
    • http://theclubburger.com/uploads/files/62624840875.pdfIn PDF document text
    • http://ferramentabelleggia.it/public/file/41309958410.pdfIn PDF document text
    • http://hiredriver.com/uploads/assets/files/pifuwu.pdfIn PDF document text
    • https://queensflower.nl/clientfiles/retukudusaxuredezun.pdfIn PDF document text
    • https://bandotrading.com/uploads/file/36008122034.pdfIn PDF document text
    • https://fminterativa.net/cms/plugins/ckfinder/userfiles/files/laduzoxinufoparor.pdfIn PDF document text
    • https://orkhaconstruction.com/wp-content/plugins/super-forms/uploads/php/files/rodbrord6n8r7v85bdohag36bc/gedivivowemijebube.pdfIn PDF document text
    • https://e-casainteligenta.ro/userfiles/file/bomujufi.pdfIn PDF document text
    • http://marikitaberbagi.com/userfiles/file/nabufereratoxadava.pdfIn PDF document text
    • http://lichnyiybrand.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1612eaa0e944be---kebot.pdfIn PDF document text
    • http://www.hcibatiment.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16132743a944b3---68919100079.pdfIn PDF document text
    • http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/161364d5f7b2e8---40326969163.pdfIn PDF document text
    • https://trade.inter-ural.ru/ckfinder/userfiles/files/23571296457.pdfIn PDF document text
    • https://lisacutler.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613984816be77---temozipipuxim.pdfIn PDF document text
    • https://rzfmuhasebe.com/userfiles/file/68161642636.pdfIn PDF document text
    • https://tinhhoaxanh.vn/userfiles/file/duzebaledopo.pdfIn PDF document text
    • https://htapigroup3.com/contents/files/rulajukogufuzofiduf.pdfIn PDF document text
    • http://abhinavabhishad.org/userfiles/file/41692267204.pdfIn PDF document text
    • http://youngshiny.com/userfiles/file/1631318197.pdfIn PDF document text
    • https://kaktutzhit.by/uploads/files/sifofenam.pdfIn PDF document text
    • http://technimexvn.com/images/ckeditor/files/58874452796.pdfIn PDF document text
    • http://theurbanbazzaar.com/userfiles/file/18176231522.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=god+of+war+1+android+game+free+downloadPDF link annotation
    • 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_off0000b775.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB775 15200 bytes
SHA-256: b855cd4fff7be0f5691b127bea82c0a4caf49f74a5be684a18dc2504bb2f12d9
font_01_sfnt_off0000de09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE09 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f620.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF620 10608 bytes
SHA-256: 7dbc57d219dd9ae548b86cd9790ee1812830bdb942f3fc9a61872ba490b6926a