Malicious PDF — malware analysis report

Static analysis result for SHA-256 d114d83680471ee6…

MALICIOUS

PDF

81.1 KB Created: 2021-09-04 23:30:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: a0bdce0e4e4419a68f8af52194934154 SHA-1: d8f23f2cb517889293371b19be4a244c8872c83f SHA-256: d114d83680471ee6046e4ebdad51d7160fa2b2f73b2f072d5e2e570aef2d587b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on compromised WordPress installations or disposable domains, suggesting a phishing or malware distribution campaign. The ClamAV detection and ML classifier strongly indicate malicious intent. The embedded URLs, such as 'https://medvor.ru/uplcv?utm_term=job+interview+question+and+answer+pdf', are designed to trick users into downloading further malicious content or revealing sensitive information.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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=job+interview+question+and+answer+pdf PDF link annotation
    • http://lavera.it/wp-content/plugins/formcraft/file-upload/server/content/files/1606c97a4ec4ef---zixevulufamenufazate.pdfIn PDF document text
    • https://pioneerlift.com/upfiles/editor/files/93059966537.pdfIn PDF document text
    • http://smn68.com/clients/75339/File/62189273554.pdfIn PDF document text
    • https://alihuata.com/userfiles/file/vukotepubuzoginesa.pdfIn PDF document text
    • http://alsumiri.net/wp-content/plugins/super-forms/uploads/php/files/be84dc9969c6bd3fe7c370e43e4d2be3/zusikomazeg.pdfIn PDF document text
    • http://allprintusa.com/admin/images/file/nakimavokanule.pdfIn PDF document text
    • https://reifenscho.de/wp-content/plugins/formcraft/file-upload/server/content/files/16127f51038eee---lurovuxizegosug.pdfIn PDF document text
    • https://noble-worldwide.com/wp-content/plugins/super-forms/uploads/php/files/902cf441c4256b67f64bb7e016e2bd5b/75695408705.pdfIn PDF document text
    • http://www.rolstoellift.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610d5840e63b6---xebajaperepaze.pdfIn PDF document text
    • http://www.deopendeur.org/imgUser/file/7244963097.pdfIn PDF document text
    • http://shangrilayunnan.com/ckfinder/userfiles/files/31247180701.pdfIn PDF document text
    • https://editionsitaliques.com/userfiles/file/fidogiwopes.pdfIn PDF document text
    • http://www.fattyweng.com.sg/wp-content/plugins/formcraft/file-upload/server/content/files/160989fd39b52b---9083106937.pdfIn PDF document text
    • http://medicare-darmstadt.de/bilder/UserImages/file/49815877233.pdfIn PDF document text
    • http://a-range.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16121845f72769---93244450162.pdfIn PDF document text
    • http://sochi-vitrazhi.ru/ckfinder/userfiles/files/96643062029.pdfIn PDF document text
    • https://lisacutler.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083ed30875e6---76609177589.pdfIn PDF document text
    • http://businessplan-capalpha.fr/mbp/upload/images/images/upload/ckfinder/98833146643.pdfIn PDF document text
    • http://www.vljainandco.com/userfiles/files/belogejetom.pdfIn PDF document text
    • http://nemdanangpho.com/uploads/2021-05-28/images/files/bagatakigugeguz.pdfIn PDF document text
    • http://www.rlktechniek.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160aaae0231fe3---sivisuxozamasus.pdfIn PDF document text
    • https://law.myvzl.com/wp-content/plugins/super-forms/uploads/php/files/ntl76np8dqo0g01ompkbu1f4oo/fozidumubudababavigu.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_off0000d7ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7ED 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f004.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF004 10972 bytes
SHA-256: 5eac976bcdbc65e8f5d757d55d883f6b90c2c67790fdada5835539a171accdfd
font_02_sfnt_off00010942.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10942 17736 bytes
SHA-256: fdff055e31d7a4a42a0e65ae216b24ba349f7d19ada44f3b75ae48968f125990

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