Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ab4e316165712f7…

MALICIOUS

PDF

94.2 KB Created: 2021-07-15 12:27:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 20b16a28e98a24d771bcad80e6b13152 SHA-1: 686e434a06d2fb0ce08abb18872957bd0609014e SHA-256: 1ab4e316165712f7157f410dcc6e6a2bf0e56f3d43898de21ba226e60a6937a8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external URIs and link farm patterns, suggesting it is designed to redirect users to potentially harmful websites. The presence of embedded URLs and the nature of the heuristics point towards a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9935

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://ketchas.ru/uplcv?utm_term=the+rime+of+the+ancient+mariner+wedding+guest PDF link annotation
    • http://aircond.md/upload_fck/file/36110905161.pdfIn PDF document text
    • https://eviinstall.com/userfiles/files/faluroninetafoja.pdfIn PDF document text
    • http://crescentcarpets.com/userfiles/file/31278765070.pdfIn PDF document text
    • https://alllegaltask.com/wp-content/plugins/super-forms/uploads/php/files/e4i8ut6dp8paevvmrkktroq6ji/sutulogob.pdfIn PDF document text
    • https://viboot.com/ckfinder/userfiles/files/juwelilo.pdfIn PDF document text
    • https://londonvipchauffeur.co.uk/wp-content/plugins/super-forms/uploads/php/files/b5ea75e4a65c470daac9e386e475d7f3/dawebo.pdfIn PDF document text
    • http://portalcom-b2b.es/img/user///file/_0298201001620169175.pdfIn PDF document text
    • https://tripleccompanies.com/wp-content/plugins/super-forms/uploads/php/files/6772e9dea1f6305939f9bf6dfced6d4d/26568475637.pdfIn PDF document text
    • https://aulacvn.com/upload/fck/file/bulemesixigazetovo.pdfIn PDF document text
    • http://dahchen.tw/userfiles/files/xirom.pdfIn PDF document text
    • https://kachhiproperties.com/wp-content/plugins/super-forms/uploads/php/files/gnh8tcf5h02huk675ig0t628a2/pesesekoli.pdfIn PDF document text
    • http://hiredriver.com/uploads/assets/files/zujufiboji.pdfIn PDF document text
    • http://klpa.net/userData/board/file/46630321603.pdfIn PDF document text
    • https://www.davinci.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160b730d43c325---magefavanowabom.pdfIn PDF document text
    • https://yuktiedu.com/wp-content/plugins/super-forms/uploads/php/files/5c8e429b6f80113a2ad03bbb0abdb1ba/rudifevakivil.pdfIn PDF document text
    • http://allg-gyn.ch/userfiles/file/48978373702.pdfIn PDF document text
    • https://misionesmedellin2030.com/wp-content/plugins/super-forms/uploads/php/files/pmo1i50sftldmeom7r9mqptbqn/21555728543.pdfIn PDF document text
    • https://sygimportaciones.com/wp-content/plugins/super-forms/uploads/php/files/2c2dbc265h98bpfq62fkfdpe3r/32221055021.pdfIn PDF document text
    • https://hotnews.md/upload/userfiles/files/22845587685.pdfIn PDF document text
    • https://masterok-kovka.ru/wp-content/plugins/super-forms/uploads/php/files/977ab6d4a7e302c30388b1ab5ffbd4aa/63021303674.pdfIn PDF document text
    • http://www.kocay.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160d75a851757e---29008112853.pdfIn PDF document text
    • https://certifiedcollisionrepair.com/home/cert/public_html/ckfinder/userfiles/files/93451593485.pdfIn PDF document text
    • http://maekalocal.com/Maeka/UserFiles/File/99925667439.pdfIn PDF document text
    • https://mobilieroccasion.fr/uploads/file/gibabiwevonoxemifoxaj.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010cc0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CC0 17404 bytes
SHA-256: ef948b121069f4a7a82cf82db948077c79ab8c812cae9f5ee4896b41bc22b8bd
font_01_sfnt_off00013a5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A5F 11024 bytes
SHA-256: 51c6fbe7654fec62cb8e8056c0e28150eab952a250fd42b9148103f4cf7a5647
font_02_sfnt_off000153c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x153C1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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