Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ecb981688826a23…

MALICIOUS

PDF

82.2 KB Created: 2021-09-06 07:17:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 7ac18c16884517d7d80e958480367097 SHA-1: 77029abe4e2fd1e254a8ae1c88ec1262f748a2ef SHA-256: 2ecb981688826a23fcf44d182da9a63f39b7ced5fbedc2789245f51513e00424
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a ML classifier and ClamAV. It functions as a link farm, directing users to numerous websites, some of which are hosted on compromised CMS platforms. The presence of multiple PDF_SEO_DISPOSABLE_LINK_FARM firings indicates a deliberate attempt to obscure the true destination and potentially distribute malware or conduct phishing attacks.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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 http://gesundezellen.de/neu/userfiles/file/tekekemafapidojomubu.pdf In PDF document text
    • http://ecbpolska.pl/wp-content/plugins/super-forms/uploads/php/files/06f0d11dc69d76d2e8a7b51bc2044f22/86467438274.pdfIn PDF document text
    • https://f27szerviz.hu/upload/files/temat.pdfIn PDF document text
    • https://landlorddebtadvisory.com/wp-content/plugins/super-forms/uploads/php/files/ovrtrss396g5psvcqbnnas30l6/53206724963.pdfIn PDF document text
    • https://www.mnogotrop.com/ckfinder/userfiles/files/sugivim.pdfIn PDF document text
    • http://www.circoloaletrium.it/wp-content/plugins/formcraft/file-upload/server/content/files/160c62bac8a498---dotenixajafovokiwabu.pdfIn PDF document text
    • http://hanasushichoice.com/uploads/files/12714480523.pdfIn PDF document text
    • http://clingac.com/d/files/9122846619.pdfIn PDF document text
    • https://www.syah.org/wp-content/plugins/super-forms/uploads/php/files/93aa3afc8baa46120be997f3bb633c4c/29917293791.pdfIn PDF document text
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/503421a652d06bcfd8b96abe360012c4/68472903141.pdfIn PDF document text
    • https://zemiigori.com/uploads/file/sibodezabufokemojag.pdfIn PDF document text
    • https://howardsteeves.com/wp-content/plugins/super-forms/uploads/php/files/7cef3f4c3c75e86ccf6d3d5f4dd4cea8/rixevaxulofesazetasov.pdfIn PDF document text
    • http://jockmurray.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086cce9792d8---xoranenifolotonemezunu.pdfIn PDF document text
    • http://kengosushionlineorder.com/uploads/files/56792587337.pdfIn PDF document text
    • http://vanillasky-ch.com/images/files/febimorokigumix.pdfIn PDF document text
    • http://www.photobreak.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16095d6040bcfa---92630689768.pdfIn PDF document text
    • http://muszempilla.com/files/file/gosozanuvatadokivore.pdfIn PDF document text
    • http://www.expo-hotel.com/english/wp-content/plugins/formcraft/file-upload/server/content/files/160e5c0a3cb7aa---43976217454.pdfIn PDF document text
    • https://rajatotogroup2.com/contents//files/tevufegumovepatela.pdfIn PDF document text
    • http://stlnsk.ru/uploads/file/87282497931.pdfIn PDF document text
    • http://www.farparts.cl/wp-content/plugins/formcraft/file-upload/server/content/files/1606f0e212db46---vujov.pdfIn PDF document text
    • https://honda-otolongan.com/upload/files/58466309397.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=gopro+hero+5+manual+focusPDF 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_off0000db78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB78 10828 bytes
SHA-256: 77fd2ba4cbb0da366c69d701126bb223a2d77abf566bb2b99170e4261eb77533
font_01_sfnt_off0000f44f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF44F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010c61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C61 17904 bytes
SHA-256: 963891193c458b035976d3509106ddc1adb455024690e9241ed9534d7f738104

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