Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1f6b9abb1a830b5…

MALICIOUS

PDF

74.1 KB Created: 2021-09-07 13:31:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: b0cf6b4e93c54fd1bbd9473e79076a3a SHA-1: 8c4cbce0c50b9d36cc1b5e938832a705c4301aa1 SHA-256: e1f6b9abb1a830b505905f6feb0fd9efae1569c6455afb698faf88d5fdca825c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs that point to various websites, many of which appear to be compromised WordPress installations used for hosting malicious files. The document's structure suggests it functions as a link farm, designed to redirect users to these potentially harmful sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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://laborke.ru/uplcv?utm_term=biografia+de+alejandro+jodorowsky+pdf PDF link annotation
    • https://unique.global/wp-content/plugins/super-forms/uploads/php/files/4e69667500942a2126b146b14bed3174/saweponumupesa.pdfIn PDF document text
    • https://doublehaircenter.com/upload/ckfinder/files/36042381539.pdfIn PDF document text
    • http://discarga.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610d666120bc0---doderivuporos.pdfIn PDF document text
    • http://cantinachitarra.it/userfiles/file/gagisadifo.pdfIn PDF document text
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607e456081f30---46746951022.pdfIn PDF document text
    • http://shuimotongyuan.com/userfiles/file/lolobusu.pdfIn PDF document text
    • http://twtipa.com/upfile/files/2021/07/16/3056533461.pdfIn PDF document text
    • https://www.c2commercial.com/wp-content/plugins/super-forms/uploads/php/files/6158909e1b504864f570aa695c62a89e/xivegutabiv.pdfIn PDF document text
    • http://xn----7sbqwxdbhblh2h.xn--p1ai/data/file/zasozizizizelomafepaj.pdfIn PDF document text
    • http://vhktn.at/images/content/files/jebelixalibefi.pdfIn PDF document text
    • http://tulsamemorialclassof71.com/clients/84987/File/mukivimuleke.pdfIn PDF document text
    • http://terapie-psi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16073ef928048a---mipufefiruwaxububi.pdfIn PDF document text
    • http://www.viksexteriors.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bc13ba55f0---36790521435.pdfIn PDF document text
    • https://www.xcelsus.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609845258bf52---tixamofol.pdfIn PDF document text
    • https://floorco.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/89b5e31d00531945301db3dd556a1a43/17207932667.pdfIn PDF document text
    • http://sportsbettingconsultants.net/cote_dor_import/admin/ckfinder/userfiles/files/kipojibulasinarov.pdfIn PDF document text
    • https://limpjet.com.br/wp-content/plugins/super-forms/uploads/php/files/2dd177861afc4190dc35b9e6185583d1/gototinosudadoladarudo.pdfIn PDF document text
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/7e15b8ccf013834b98fad72ebec5324c/vajupuwivawawoxuben.pdfIn PDF document text
    • https://www.hinkler.com.au/application/third_party/ckfinder/userfiles/files/16637792520.pdfIn PDF document text
    • https://lcd96.ru/wp-content/plugins/super-forms/uploads/php/files/ccab210dd779ed539d1817cd680739ab/kotapagosadodigos.pdfIn PDF document text
    • http://fixafilm.se/userfiles/file/26423471130.pdfIn PDF document text
    • https://www.ideaklinik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16070d968f10d2---56018787185.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_off0000bc89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC89 17036 bytes
SHA-256: b627d7e178a19a031bc70f71373463c761e76a701a6096035a2f87c1e7380cab
font_01_sfnt_off0000e8c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8C3 11048 bytes
SHA-256: 7e380be4de3e9699805e7e00d52556908b86204f3fbe8632b3ff521253c9f6c9
font_02_sfnt_off00010279.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10279 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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