Malicious PDF — malware analysis report

Static analysis result for SHA-256 614846dad6eb226c…

MALICIOUS

PDF

87.3 KB Created: 2021-07-21 15:02:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: b8cdc46058005343ec26545d9e36ae1c SHA-1: 5966078d209e4eea8fedc5044cfc69dcb69fe791 SHA-256: 614846dad6eb226c71c671942171106655cf5345942fabbaf2406b2b27959fd6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites acting as link farms. The ML classifier and ClamAV detection strongly indicate maliciousness. While no scripts were directly extracted, the PDF structure and URL patterns are consistent with phishing or malware distribution lures, likely intended to trick users into downloading further payloads or visiting malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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://admonks.ru/wp-content/plugins/super-forms/uploads/php/files/d9e70fdbb2d9e35ccf1cd46c64816f3c/86565139323.pdf In PDF document text
    • http://rogalafamilyreunion.org/clients/0/0d/0db8e8e54aa701f14f52e26b989c21c2/File/57024052375.pdfIn PDF document text
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a651f9419a6---bevuxasop.pdfIn PDF document text
    • https://www.finestkindcharter.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa4005884cf---lulinepo.pdfIn PDF document text
    • https://cruiseship.cruises/wp-content/plugins/super-forms/uploads/php/files/8jepq19q49a84lihk6dp4ef0lt/75552508518.pdfIn PDF document text
    • http://carroll1975.com/clients/4/4e/4e2b018d07aaa5a30c3e4fca1c7a8df7/File/14338203736.pdfIn PDF document text
    • http://eurolocal.info/sites/default/files/images/file/85921231978.pdfIn PDF document text
    • https://calldidocta.com/wp-content/plugins/super-forms/uploads/php/files/6c12e4c3a08929ead4d6b7b06b463caf/30913112532.pdfIn PDF document text
    • http://radio-salsa.com/php/rs/filesupload/file/12709591271.pdfIn PDF document text
    • https://web-sila.ru/wp-content/plugins/super-forms/uploads/php/files/eb2aff6dbc735625bb607c163bd11a21/19498963453.pdfIn PDF document text
    • http://www.chinahkcarplate.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6f9d5da816---49508953407.pdfIn PDF document text
    • http://tischlerei-schlusche.de/sites/default/files/file/rovidejepiledoberigilaxo.pdfIn PDF document text
    • http://alarcon-v.com/editor_upload_image/file/15195326135.pdfIn PDF document text
    • https://andrejc.si/files/file/97019232450.pdfIn PDF document text
    • http://mamsongdamchoi.com/images/chua-phan-loai/files/19506621383.pdfIn PDF document text
    • http://xn----7sbabjkhbzbqti4a3apfmdd2s4b.xn--p1ai/ckfinder/userfiles/files/lafijataboradiruvati.pdfIn PDF document text
    • https://k-kompany.ru/wp-content/plugins/super-forms/uploads/php/files/013703cfd4a345ddbead4eed948dfaeb/28014870070.pdfIn PDF document text
    • http://righetti-ticozzi.it/userfiles/files/86735911823.pdfIn PDF document text
    • http://sh8ke.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a041a4c6578---75487813354.pdfIn PDF document text
    • https://aldurra.ly/images-editeur/img/file/towafomepavodivit.pdfIn PDF document text
    • http://www.theagentpipeline.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d93da9049a2---77280125471.pdfIn PDF document text
    • http://alphanaturehk.com/userfiles/file/26637269067.pdfIn PDF document text
    • http://psychologkmalinowska.pl/ckfinder/userfiles/files/44236163026.pdfIn PDF document text
    • http://mijneigenlift.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16095c66decd25---63642841426.pdfIn PDF document text
    • https://snabavto.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609aa9b8d6048---30934704555.pdfIn PDF document text
    • https://mytopics.it/uploads/file/43252216474.pdfIn PDF document text
    • http://iamsong.vn/uploads/files/57366911503.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=design+of+distributed+databasePDF 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_off0000f41e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF41E 16652 bytes
SHA-256: a268c9cfe4fc106c5d589bceceb521535affc0fe69d27e8cbfb734c10dc98b91
font_01_sfnt_off00011f33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F33 10724 bytes
SHA-256: cd746551560aee16d653c86a45fc7aa0a8e852a5c0534bd38a8d835fb4bc09eb
font_02_sfnt_off000137cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x137CC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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