Malicious PDF — malware analysis report

Static analysis result for SHA-256 e98c7c2fe98a770d…

MALICIOUS

PDF

88.3 KB Created: 2021-09-07 17:08:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 7b5bd06fdd773936f3be97c0a2108ae4 SHA-1: 7aabe02c8542132ade0b7fbbbd9084d9b94033db SHA-256: e98c7c2fe98a770d273a452891dc17be5b906663c2d5028a3b130c07ce3ee5bd
156 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The file contains numerous embedded URLs pointing to compromised WordPress sites and other disposable hosting, suggesting it functions as a link farm. These links are likely intended to redirect users to phishing pages or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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://drafthe.ru/uplcv?utm_term=microprocessor+book+gaonkar+pdf PDF link annotation
    • https://flylights.pl/wp-content/plugins/super-forms/uploads/php/files/bg6tjr6fhaki5d17eml0mle5t3/3930926958.pdfIn PDF document text
    • https://psychotherapie-dr-albrecht.de/wp-content/plugins/formcraft/file-upload/server/content/files/160adf5a4d3e3b---tasiw.pdfIn PDF document text
    • http://bisenzia.it/userfiles/files/52928681895.pdfIn PDF document text
    • http://subventionsbetrug.de/wp-content/plugins/super-forms/uploads/php/files/s20f45fhldeb87lkichg4qu96p/32104053071.pdfIn PDF document text
    • https://www.alertgy.com/wp-content/plugins/super-forms/uploads/php/files/a25c798fa3f26d380d946b0349135e87/52297979304.pdfIn PDF document text
    • http://socialbomjesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/16086617780f1b---83983216854.pdfIn PDF document text
    • https://petala.gr/userfiles/file/39694309949.pdfIn PDF document text
    • https://sunsoftinfoway.net/ckfinder/userfiles/files/98209616242.pdfIn PDF document text
    • https://butterfly-propertymanagement.com/userfiles/file/28893905771.pdfIn PDF document text
    • https://facades-et-traditions.com/actualites/file/19385190687.pdfIn PDF document text
    • http://berallebags.com/UploadFiles/FCKeditor/20210508090235.pdfIn PDF document text
    • https://www.birdandwildlifeteam.com/wp-content/plugins/formcraft/file-upload/server/content/files/160771baf068e9---88190801485.pdfIn PDF document text
    • http://ppogrimall.com/upload/editor_image/file/56058654495.pdfIn PDF document text
    • http://elcampoeco.org/FCKeditor/file/rodevaronexabe.pdfIn PDF document text
    • http://kozszemle.hu/uploads/files/375363673.pdfIn PDF document text
    • https://www.shopveriamici.com/wp-content/plugins/super-forms/uploads/php/files/m6s2hcttodvavff7c62aofqdl3/80846211047.pdfIn PDF document text
    • https://inchiriereelicopterromania.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160acd78e5d7a3---rurululoxipivijofe.pdfIn PDF document text
    • https://bamor.org/userfiles/file/50376973552.pdfIn PDF document text
    • http://geology.ie/wp-content/plugins/formcraft/file-upload/server/content/files/160ae955320cea---1428674983.pdfIn PDF document text
    • http://www.psstrecno.sk/wp-content/plugins/formcraft/file-upload/server/content/files/160a62ac357b5a---30405092023.pdfIn PDF document text
    • http://indovinandoilmondo.it/themes/userfiles//files/nisisusegadizepesegaxifom.pdfIn PDF document text
    • http://www.scsi.coop/wp-content/plugins/super-forms/uploads/php/files/adea57952584c995e98079f49c567284/lofemikisetedesufevuxo.pdfIn PDF document text
    • http://614move.com/clients/4890/File/radunepiv.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_off0000f5ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5CE 17344 bytes
SHA-256: 2870620e5330e7c8232d5c8b9af8cb3dca17e1a4e3ab0dbed34840887d513eca
font_01_sfnt_off0001231b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1231B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013b32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B32 10876 bytes
SHA-256: 3e9cee6ee8b5c6f52089bd81260416509e44a55df3ead535b2f64488dba41f83

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