Malicious PDF — malware analysis report

Static analysis result for SHA-256 b995d868cd54ad52…

MALICIOUS

PDF

81.9 KB Created: 2021-09-03 19:27:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 5b914fc59d4201624d5907bfb5972e61 SHA-1: b293cf4a3845fda4a06033226f64f4eb0a1cb3e3 SHA-256: b995d868cd54ad52bb4605065050e10209c164c55a4be12e93ab10cf0680e3a2
156 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs, many of which point to compromised CMS upload storage or disposable hosting, indicating a link farm designed for malicious redirection. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://k-kompany.ru/wp-content/plugins/super-forms/uploads/php/files/3a9e4694ddde989a2e7f947b28b7f012/48960897088.pdf In PDF document text
    • http://sinners-party.de/media/file/nivudilugolikujer.pdfIn PDF document text
    • http://plusbateria.com/wp-content/plugins/formcraft/file-upload/server/content/files/161053df5a557a---25203603618.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/1mfalsho7cfot12gflb5s13s53/likinixuma.pdfIn PDF document text
    • http://losmarinoslanzarote.com/marinarubicon/admin/file/sonudilimudotuwiwobezu.pdfIn PDF document text
    • http://visualpaint.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7bde14485c---85950943035.pdfIn PDF document text
    • http://sciattella.net/images/file/98615213600.pdfIn PDF document text
    • http://raduzhniy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a3e381111f---13689739485.pdfIn PDF document text
    • http://www.oschouston.com/osc/wp-content/plugins/formcraft/file-upload/server/content/files/160854992dec84---wevasodasaputufuluvi.pdfIn PDF document text
    • http://champaigncursillo.com/userfiles/file/poketigorij.pdfIn PDF document text
    • https://alakharia.com/public_html/userfiles/file/94343525740.pdfIn PDF document text
    • https://macleanpinesdrivingschool.com.au/wp-content/plugins/super-forms/uploads/php/files/a67f0415700db67397927bcb5e5ce0fc/81378997250.pdfIn PDF document text
    • http://michellenevinracing.com/FCKeditor/file/2305577833.pdfIn PDF document text
    • http://studiomarcheluzzo.it/userfiles/files/piwizazukepafujilimapev.pdfIn PDF document text
    • https://webmodels.studio/wp-content/plugins/formcraft/file-upload/server/content/files/1609073bc9a3ee---gibilelitigisoj.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/1607e1f659da83---bapibelilikutituz.pdfIn PDF document text
    • http://tragiaocolamsapa.com/userfiles/image/file/bunusamiwa.pdfIn PDF document text
    • https://fotokeramika.bg/userfiles/file/lodipe.pdfIn PDF document text
    • http://swaminarayangm.org/userfiles/file/20239039711.pdfIn PDF document text
    • http://appli-veolia.net/ckfinder/userfiles/files/zozosi.pdfIn PDF document text
    • https://hopadive.cz/ckfinder/userfiles/files/xazomubepilodekor.pdfIn PDF document text
    • http://jatyn.cn/upfiles/202107/file/1625687586.pdfIn PDF document text
    • http://studiodugnani.it/userfiles/files/dibinipana.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=create+multiple+worksheets+in+excel+2013PDF 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_off0000da3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA3E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f255.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF255 11516 bytes
SHA-256: 1a52b2ebc54a95b36aab8d0d3c9ab19d806b9a5d691bd04fdae4a5102e4c9cda
font_02_sfnt_off00010d96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D96 17136 bytes
SHA-256: 6a4e3d8f78697109818bfe248450692b50b63daf33e8a5ab6c7427323a1b7549

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