Malicious PDF — malware analysis report

Static analysis result for SHA-256 69559d4f285bd6ee…

MALICIOUS

PDF

124.9 KB Created: 2021-09-01 00:47:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 98254b8cb4ae38b7f6febb35dfe4c030 SHA-1: 8d24e11441d207e20df36061359486d11260f043 SHA-256: 69559d4f285bd6ee2070df34a87cfd0008fd95897c86a022077211404b5b0a33
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The sample is a PDF file flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs pointing to various domains, many of which appear to be compromised or disposable hosting. The heuristic PDF_SEO_DISPOSABLE_LINK_FARM indicates a link farm strategy, suggesting the document's primary purpose is to redirect users to external, potentially malicious, sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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://huntic.ru/uplcv?utm_term=notice+to+proceed PDF link annotation
    • https://uleshuzatabc.hu/files/file/88542105695.pdfIn PDF document text
    • https://paperland.bg/uploads/file/daregada.pdfIn PDF document text
    • https://demircanticaret.com/userfiles/file/purovodopawubuv.pdfIn PDF document text
    • http://gruppocinofilomarsalese.com/userfiles/files/fajovebejesufunagiwunav.pdfIn PDF document text
    • https://whitesal.com/data/images/file/5524_20210713045032.pdfIn PDF document text
    • http://trackeg.com/en/wp-content/plugins/formcraft/file-upload/server/content/files/160707f690fe2f---podenofeladodusolotobara.pdfIn PDF document text
    • http://www.melodypods.com/wp-content/plugins/formcraft/file-upload/server/content/files/160903c725df12---fivivozakonumibarofofemip.pdfIn PDF document text
    • https://www.entornopublicitario.com/wp-content/plugins/super-forms/uploads/php/files/fabb5d86c1eb48d1d22effff0b6136d5/1581783944.pdfIn PDF document text
    • http://saimiri.name/upload/file/xegudiwuguj.pdfIn PDF document text
    • https://3dreamvr.com/wp-content/plugins/super-forms/uploads/php/files/a85ce9674bdf976bd0737421a72d4e5e/42528523599.pdfIn PDF document text
    • http://skiflogistics.ru/userfiles/file/kesures.pdfIn PDF document text
    • https://samiznojmo.cz/wp-content/plugins/super-forms/uploads/php/files/f7bdcfffea0223acbabf8447e4a5697c/nujusimol.pdfIn PDF document text
    • https://hometutorsdelhi.com/userfiles/files/kanobasujosovafepu.pdfIn PDF document text
    • http://pro-customer.de/userfiles/file/wolapimagilogome.pdfIn PDF document text
    • https://abril.pe/wp-content/plugins/super-forms/uploads/php/files/ttp29ogmddhbpodk2kt0gd4gbj/60467590978.pdfIn PDF document text
    • https://www.mybizwebsites.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6c003d66ae---87367695854.pdfIn PDF document text
    • http://nacyc.jp/Upload/file/dilun.pdfIn PDF document text
    • http://mweb.cz/images/file/xokixukivumazurukifapite.pdfIn PDF document text
    • https://refour.eu/wp-content/plugins/super-forms/uploads/php/files/a70b293be90173f4ba12c9df4a7366c0/tudimunujosugipid.pdfIn PDF document text
    • http://greenbrier101.com/userimages/69435987365.pdfIn PDF document text
    • http://www.opencalgary.org/wp-content/plugins/formcraft/file-upload/server/content/files/1610b1d95ec1fd---rasokuzakarunugi.pdfIn PDF document text
    • https://www.mercedesbenzofaustinservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609835cc0dbb0---36136803823.pdfIn PDF document text
    • https://werbemittelag.chupload/file/fopilixadafijo.pdfIn PDF document text
    • http://bharatandcompany.in/ckfinder/userfiles/files/30500968290.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_off00018880.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18880 17824 bytes
SHA-256: 68be67c0787b9140f7f22c5ef84c2817d50a32d4c791448abe7919e5123d464b
font_01_sfnt_off0001b6e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B6E9 10004 bytes
SHA-256: 17fc956c0a68e1ca2aed474da87e1dd4b8d0fa70d84655ab1d29daf97257b949
font_02_sfnt_off0001cd33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1CD33 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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