Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d0c1d955468dbcc…

MALICIOUS

PDF

82.9 KB Created: 2021-08-22 01:06:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-22
MD5: 2375847a4936bff407834588fb8604b6 SHA-1: 532f0342c73c78786b91385eacf2800c38c0f43e SHA-256: 8d0c1d955468dbcc621e0ebed26bd0e46758d4fc54e2511215568a2e5da8a4e9
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to compromised WordPress sites, indicating a link farm designed to redirect users. Heuristics like 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' strongly suggest this malicious intent. The ML classifier and ClamAV detection further confirm its malicious nature, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

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://www.tai.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160c401d8a2492---pizekogewomupatisedepa.pdf In PDF document text
    • http://studiomarcheluzzo.it/userfiles/files/piwizazukepafujilimapev.pdfIn PDF document text
    • https://nam.it/wp-content/plugins/formcraft/file-upload/server/content/files/160c7aafe0e19d---lekonazitubamapomudeju.pdfIn PDF document text
    • http://english-island.pl/wp-content/plugins/super-forms/uploads/php/files/52g9hq19jv4g6044m4kgu7kja0/febiwidivoviruxulilum.pdfIn PDF document text
    • http://www.cafeinca.com/img/public/contenido/file/38185359033.pdfIn PDF document text
    • https://et-auditing.com/userfiles/files/83769411284.pdfIn PDF document text
    • http://alternativefitness.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a8f63b910e9---38318266370.pdfIn PDF document text
    • http://mesahighclassof63.com/clients/79820/File/28860646993.pdfIn PDF document text
    • http://www.gainerwindows.ca/wp-content/plugins/super-forms/uploads/php/files/2lo8m96u674fctnrvlsao15m24/18561966987.pdfIn PDF document text
    • http://bortran.com/upload/image/file/20210723094356.pdfIn PDF document text
    • http://ridendo.cz/files/file/fijuju.pdfIn PDF document text
    • http://joyearland.com/ckfinder/userfiles/files/9451408826.pdfIn PDF document text
    • http://sameiroeventos.pt/ficheiros/xobosilatexiv.pdfIn PDF document text
    • http://www.skup.it/wp-content/plugins/formcraft/file-upload/server/content/files/16098a62217dce---29280555145.pdfIn PDF document text
    • http://alexlunacoach.com/img/editor/file/puwefefu.pdfIn PDF document text
    • http://ridgefieldpark1967.com/clients/3/39/39eebdc8797e30ee23d4fd57d071fd44/File/kugutekinemetuxodokus.pdfIn PDF document text
    • https://puertoestereo.com/wp-content/plugins/super-forms/uploads/php/files/n3lgfb7i1t9cs78sh9d05u8m89/jabaxomojesokonuguj.pdfIn PDF document text
    • https://halobysciton.com/wp-content/plugins/formcraft/file-upload/server/content/files/160807ead90e1f---wusavigetogorubevipaz.pdfIn PDF document text
    • http://www.fullmooneye.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9ff797c697---kovewiz.pdfIn PDF document text
    • https://pasarantogelsatu.com/contents//files/gujekojevoramegefopexinoj.pdfIn PDF document text
    • http://kidneytracker.com/ckfinder/userfiles/files/pukuruxoralivoxinag.pdfIn PDF document text
    • http://likebarcode.com/image/files/20210701_220847.pdfIn PDF document text
    • https://www.a2zmedical.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c06fc935043---dedisanetokuvaxe.pdfIn PDF document text
    • https://www.colline-eternelle.com/ckfinder/userfiles/files/567853563.pdfIn PDF document text
    • http://tourister.kr/userfiles/file/jadunipafefafovabesur.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=carte+teste+13+din+15PDF 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_off0000de8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE8B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f69d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF69D 19476 bytes
SHA-256: 9738e433721b2e4e15ad07f38e76d5341bca75d0e227cc5e32c6bdf162cd4830
font_02_sfnt_off0001270d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1270D 10464 bytes
SHA-256: d76045dd4c1823538fa2482e43e9228566c7817666cc5bae5ab55588b7fdb026

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