Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3cfa625fa00364a…

MALICIOUS

PDF

95.4 KB Created: 2021-08-11 09:06:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 5a3e9460e967263c7f6c502037426fce SHA-1: 06d3bf4b4d86af3e7da758da943f6fb684c9dee1 SHA-256: c3cfa625fa00364a1238829109be5d09df0112ec8a01480077ff2c482fb1cca0
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file exhibits characteristics of a phishing lure, employing a link farm to direct users to potentially compromised websites. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' indicates the document likely instructs users to download an archive, providing a password separately to bypass gateway scanning. While no scripts were directly extracted, the PDF structure and URL patterns suggest an attempt to facilitate the download of a malicious payload, possibly via embedded JavaScript.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://absolutelyneon.com/userfiles/file/vatowasuwawix.pdf In PDF document text
    • http://kraljicabih.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c20ef36083---wuvijipinal.pdfIn PDF document text
    • https://finatwork.com/userfiles/file/11628878702.pdfIn PDF document text
    • http://woonhuislift.info/wp-content/plugins/formcraft/file-upload/server/content/files/160afd87a4d1fd---10714705379.pdfIn PDF document text
    • https://directprocessors.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093a5980400e---83144015806.pdfIn PDF document text
    • http://fairmonteast1975.com/clients/0/01/014dde3c838f86fef2ac1d31a86c415b/File/87250809745.pdfIn PDF document text
    • https://drmiamiconnect.com/wp-content/plugins/super-forms/uploads/php/files/d3724bec7e4ffcbc0049e4e3b6659fe1/16944466328.pdfIn PDF document text
    • http://npxbyy.com/wang3_3_10_27/Upload/Upload/file/2021530104374226.pdfIn PDF document text
    • http://bilagroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086f113f05f4---30059516522.pdfIn PDF document text
    • https://bluetact.com/locktactyuma/userfiles/file/fipotagum.pdfIn PDF document text
    • https://psfund.org/public/uploads/files/cms_files/12381322897.pdfIn PDF document text
    • http://klpa.net/userData/board/file/37621620329.pdfIn PDF document text
    • http://abwingsmd.com/uploads/files/81904218421.pdfIn PDF document text
    • http://steclotildehorton.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607b916d669a3---nusunifokewaf.pdfIn PDF document text
    • http://fullcolorspandoeken.nl/userfiles/file/49029111838.pdfIn PDF document text
    • http://skipjackpoke.com/ckfinder/userfiles/files/wewobel.pdfIn PDF document text
    • https://www.hungarianassociation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa2fba637a4---43495507435.pdfIn PDF document text
    • http://www.fotografoeventimilano.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c5c8654989---71517091857.pdfIn PDF document text
    • http://ballmillfactory.com/d/files/87475267602.pdfIn PDF document text
    • http://kystop.com/wp-content/plugins/super-forms/uploads/php/files/5iqqsv42u7ai3loes7kjagd775/99576012100.pdfIn PDF document text
    • http://snookerfootball.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1611227c940d07---81623440177.pdfIn PDF document text
    • https://www.helpagesl.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a3823e9423b---61902981474.pdfIn PDF document text
    • http://frangarcia.eu/upload/file/purokemubifev.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=legacy+of+discord+hack+apk+android+1PDF 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_off0001107c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1107C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00012893.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12893 10968 bytes
SHA-256: 58f29876baf2c9aa648084354a4f5f8732ddbf088acd32a1229be5818dd84764
font_02_sfnt_off000141d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x141D4 17160 bytes
SHA-256: 50767c79aeb8197921917c6a20e9f51099c6e8d263944a29508e9811212bc529

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