Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c0d134f1533c079…

MALICIOUS

PDF

80.6 KB Created: 2021-09-03 19:19:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 76a405b7e94b6809cd150ba4388fc513 SHA-1: 60f370d2bd236db556dc4fe8e5e2f55838b876f1 SHA-256: 0c0d134f1533c0796a784d35e3f8df6a966aaa9def48ad407fca101cf5e080cc
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to compromised WordPress sites or disposable hosting, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://philabc.ru/uplcv?utm_term=katip+bartleby+pdf PDF link annotation
    • https://all-stage-meditation.tw/uploads/files/610cd39d346b2.pdfIn PDF document text
    • http://aklond.com/UploadFilesfile///2021062502494571.pdfIn PDF document text
    • https://bio-obst-und-gemuese.de/userfiles/file/40871006330.pdfIn PDF document text
    • http://tuzvedo.hu/elemek/file/genivufupusukejirirododav.pdfIn PDF document text
    • https://asigurareingermania.ro/wp-content/plugins/super-forms/uploads/php/files/9p9il0ep1snsmm9qvn28d5cq6q/tamum.pdfIn PDF document text
    • https://www.gsccn.it/wp-content/plugins/formcraft/file-upload/server/content/files/16081e422a5bfa---tuduxenidanufa.pdfIn PDF document text
    • https://nulifeus.com/~nulife/userfiles/file/97876671320.pdfIn PDF document text
    • https://aquaticlandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e5cf1075c6---96228273430.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608044708cc19---tubabomanuwumuwebop.pdfIn PDF document text
    • http://evabody.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1607c7ae58fbd0---29958501899.pdfIn PDF document text
    • http://ccsilver.kr/files/fckeditor/file/557780708610c1bd140f93.pdfIn PDF document text
    • http://limoride.net/gallery/file/46531308776.pdfIn PDF document text
    • http://www.pvvc.cz/files/zitalowixubazotowoxozepos.pdfIn PDF document text
    • http://www.holzbau-hoelzl.at/wp-content/plugins/formcraft/file-upload/server/content/files/160bc8d3b0ee7d---luterimupenos.pdfIn PDF document text
    • https://celebicatering.com/upload/ckfinder/files/kuleruzekal.pdfIn PDF document text
    • https://elitestrategyglobal.com/wp-content/plugins/super-forms/uploads/php/files/e28ee5e3f9e08c7176569e2d20162f4c/76019867060.pdfIn PDF document text
    • https://ienter.bg/files/58927125844.pdfIn PDF document text
    • https://mission4recruitment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c87e4e9e87---sosikemokesozumisogemifux.pdfIn PDF document text
    • http://www.deadclan.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16094af7d93f48---gavafidokiniz.pdfIn PDF document text
    • https://drivetripper.com/userfiles2020/files/57577877911.pdfIn PDF document text
    • http://queuemanagementsystems.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610c7baa84c0d---duzaboxitad.pdfIn PDF document text
    • https://wroclawmodelshow.pl/ckfinder/userfiles/files/fatisigivozejojar.pdfIn PDF document text
    • http://yourtruck.be/upload/ckeditor/file/wuwawadafelinuvusederezaj.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_off0000d0c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0C6 20352 bytes
SHA-256: a62ff78661528f23de7c43bb480e645137261c68893b4d7c8cf6ebf2c0649c5c
font_01_sfnt_off0001041d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1041D 10344 bytes
SHA-256: 852bc89208bce7aec5e0040704327340818301ead46b625e3c917e3307e50a33
font_02_sfnt_off00011b5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B5F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1