Malicious PDF — malware analysis report

Static analysis result for SHA-256 4fa255ef0307fe4a…

MALICIOUS

PDF

84.4 KB Created: 2021-09-07 20:26:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: f291a2dd167664c1bf230d08ff58b3af SHA-1: d45b79404c1d671b66fa4daaa18dd3422bf5c45c SHA-256: 4fa255ef0307fe4a3b52f5cebb85495c4ad12ea60711b94fac5a4efb520c21d0
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The file contains a link farm with numerous URLs pointing to compromised WordPress upload directories and other disposable hosting, suggesting an attempt to redirect users to malicious content or phishing sites. While no scripts were explicitly extracted, the PDF structure and URL patterns are indicative of a phishing or malicious redirection campaign.

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://kultmotor.hu/images/files/33317585781.pdf In PDF document text
    • http://argentum.com/wp-content/plugins/super-forms/uploads/php/files/jbqk87pkf7f0fpd9u3je31gtj2/82861415743.pdfIn PDF document text
    • http://www.patricktennis.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16095cd804db42---51993106243.pdfIn PDF document text
    • https://www.inkfactory.pk/wp-content/plugins/formcraft/file-upload/server/content/files/16084bc800b504---kazoxupadat.pdfIn PDF document text
    • http://www.dfdtrading.sk/ckfinder/userfiles/files/tixefijugisosujiju.pdfIn PDF document text
    • http://cargo3030.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1606d7e3e54372---rofosizakodigupuniz.pdfIn PDF document text
    • http://budoprojekt.eu/obrazy/file/19522795382.pdfIn PDF document text
    • https://www.pferde-fuer-unsere-kinder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b9cd1be8135---papunalolisejem.pdfIn PDF document text
    • https://championsforchildren.org/wp-content/plugins/super-forms/uploads/php/files/a9140d96ae62d613b5604f16fe092f30/89292479789.pdfIn PDF document text
    • http://www.orhancoskun.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b85e439f25e---70953730792.pdfIn PDF document text
    • http://vankouwenenmastop.nl/UserFiles/file/fudifamupali.pdfIn PDF document text
    • http://www.sosonomo.com/ckfinder/userfiles/files/53030429896.pdfIn PDF document text
    • http://ed-web.cz/userfilesfile/fivatan.pdfIn PDF document text
    • https://vanvoorst.info/uploaded/file/zijogatirosejenogozurezon.pdfIn PDF document text
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/34718bb5b1365c3f521cbcf29276947a/46356896336.pdfIn PDF document text
    • https://siyata.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1608631080273f---vajarifojokoxagokebevov.pdfIn PDF document text
    • http://allaboutdowney.com/userimages/79016304198.pdfIn PDF document text
    • http://bridgesonthepark.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607536158e164---9741705504.pdfIn PDF document text
    • http://www.onekaddy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d552c6c069d---tapekubatir.pdfIn PDF document text
    • http://inbjnews.com/data/cheditor/0603/files/guxonetis.pdfIn PDF document text
    • http://jongauger.com/ckfinder/userfiles/files/vujewisojoburewekaxinujo.pdfIn PDF document text
    • http://kennyre.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d958f8c26aa---dipupagemezovinazomad.pdfIn PDF document text
    • http://climacom.eu/userfiles/files/xobigejofim.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=2013+kia+soul+owners+manual+downloadPDF 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_off0000e1a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1A1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f9b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9B3 18588 bytes
SHA-256: dcccbbd46adcea09c71d3f62ff869eb698081f2c6faa493a35c8d749560d8f50
font_02_sfnt_off00012a51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A51 10956 bytes
SHA-256: 183e76747135818d521baf942aea73aa5c53d4308c71061dc2d055ac74c8d059

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