Malicious PDF — malware analysis report

Static analysis result for SHA-256 01da61c21a18c899…

MALICIOUS

PDF

82.6 KB Created: 2021-07-02 18:10:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 5312ab73c09aa247d14ff52a14e0412a SHA-1: 0b57d64ec38b6839fbec9fc1e64da728bcacf708 SHA-256: 01da61c21a18c89961c516575105b8ad78b9e6a1129995a1baa27a367d6ab486
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous external URIs and link farms pointing to compromised websites, indicating a phishing or malware distribution attempt. The ClamAV detection and ML classifier strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://coretry.ru/uplcv?utm_term=experimental+research+pdf+sample PDF link annotation
    • https://www.baptistenhardenberg.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160892bb55b763---6846089036.pdfIn PDF document text
    • http://ei-windykacja.pl/upload/file/degugifafamilefigubapesi.pdfIn PDF document text
    • https://rrvchefs.com/wp-content/plugins/super-forms/uploads/php/files/5a97677f068780a5e08638eb8a01197e/50407751948.pdfIn PDF document text
    • http://bocghedanang.com/media/ftp/file/59749780138.pdfIn PDF document text
    • https://www.azembay.com/wp-content/plugins/super-forms/uploads/php/files/nhdo2qfj43qt3p2k4hn58ijj31/48217522120.pdfIn PDF document text
    • http://clubselectionvoyages.com/images/file/13587793840.pdfIn PDF document text
    • http://www.alwaysflorida.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072f8f1a4a49---97095868650.pdfIn PDF document text
    • https://www.vbclighting.com/wp-content/plugins/super-forms/uploads/php/files/241df62bd1a707440886f36e0e98105f/91132563605.pdfIn PDF document text
    • https://studiorampinelli.com/file/dakupoketi.pdfIn PDF document text
    • http://bukharaalpharetta.com/sites/default/files/file/61121697822.pdfIn PDF document text
    • http://www.communityheroesproject.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609c0076a9c35---pidukidaridoxozagolivof.pdfIn PDF document text
    • http://bafiti.com/sklep/userfiles/file/14606737563.pdfIn PDF document text
    • https://www.couleurs-et-jardin.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160a5b05c5bc18---fudevepisodudazix.pdfIn PDF document text
    • http://svsteinfurth.de/radsportfiles/file/solezapoberaxarag.pdfIn PDF document text
    • http://bilagroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b0ef2db04ff---buvupimax.pdfIn PDF document text
    • http://alexanderkanevskyartistbiography.com/clientMedia/file/muserenikalajabikopup.pdfIn PDF document text
    • http://bochosushi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cb6687f428---xuvexivifupa.pdfIn PDF document text
    • http://misspacificus.com/clients/873634/File/mupasiwurixa.pdfIn PDF document text
    • https://studiorampinelli.com/file/bonitolezizi.pdfIn PDF document text
    • http://akinmedical.com/uploads/file/75938110448.pdfIn PDF document text
    • http://rethabise.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160b2d4e41f976---geduvipedadisu.pdfIn PDF document text
    • http://phongkhamthienhoa.org/images/files/ritevutafotuzuparitumurom.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000de17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE17 18012 bytes
SHA-256: 68625a100bb70c8b9fd46d072a88249a72ad82664b5a479f84ae4245ed1ce9f2
font_01_sfnt_off00010c6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C6D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012484.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12484 10852 bytes
SHA-256: 83dcd02a1100e2a6f025e2f69bddf1478473b42b269abcbec1ad7c0289c808ed

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