Malicious PDF — malware analysis report

Static analysis result for SHA-256 c014c2bafe4e1ac2…

MALICIOUS

PDF

86.3 KB Created: 2021-09-01 03:55:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 542baf8036f51480c0ff307f89f5ef2c SHA-1: d7d4034451a52c57d473677d1ed5d335135e03dc SHA-256: c014c2bafe4e1ac277bac0273ed84ac38948abc79f5251f82e0bb946095dd361
156 Risk Score

Malware Insights

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

The file is a PDF that contains a link farm pointing to multiple other PDF files hosted on compromised WordPress sites. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of numerous links on disposable hosting and compromised CMS upload storage suggests a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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://alignerco.com/wp-content/plugins/super-forms/uploads/php/files/84626fd765878014e88f5114bd439d9f/kajunomoxoj.pdf In PDF document text
    • http://padgettlawreunion.com/clients/79772/File/97925171575.pdfIn PDF document text
    • http://onlinepravenconsultant.com/uploads/wysiwyg/files/rovareg.pdfIn PDF document text
    • http://bascobrunswick.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16090aef27819f---jazebuweferusuliruv.pdfIn PDF document text
    • http://marcobernini.it/userfiles/files/38312728130.pdfIn PDF document text
    • http://townofwinslowin.com/flash/townofwinslowin.com/file/97015588702.pdfIn PDF document text
    • http://aceonlinementors.com/userfiles/file/pogofisipototivegodamenuz.pdfIn PDF document text
    • http://boekenwinkelindex.nl/images/uploads/25814441085.pdfIn PDF document text
    • http://www.birapart.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7a8854d489---11075648836.pdfIn PDF document text
    • http://herium.net/FileData/ckfinder/files/20210630_326B6FD991857B87.pdfIn PDF document text
    • https://ambient-interier.cz/files/files/1426453481.pdfIn PDF document text
    • https://gauravkankariya.com/wp-content/plugins/super-forms/uploads/php/files/gavdaifq8qg3vliea80o6449q3/voluxasagavu.pdfIn PDF document text
    • https://www.beewellrx.com/wp-content/plugins/super-forms/uploads/php/files/tmp/73589017087.pdfIn PDF document text
    • http://captaincook.hu/userfiles/file/soxexotesizuruvap.pdfIn PDF document text
    • http://mopron.ru/upload/files/83841560332.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16112178977b60---22220914765.pdfIn PDF document text
    • http://palakkadtourism.in/ckfinder/userfiles/files/ripezujo.pdfIn PDF document text
    • https://www.growxponential.com/wp-content/plugins/super-forms/uploads/php/files/r9floth0r7m5m6m90sb6bpr1uc/81260780214.pdfIn PDF document text
    • http://best-infosystems.com/userfiles/file/zoluxosepikevesa.pdfIn PDF document text
    • https://salvatoredivilio.it/userfiles/file/wokexawudupazominozi.pdfIn PDF document text
    • http://24hnbc.com/assets/ckfinder/core/connector/php/uploads/files/18395965865.pdfIn PDF document text
    • https://www.hagensmarketing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d90fe994fca---ketulenesugo.pdfIn PDF document text
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/137e8638c7a21c9a7d032bc1afe3278d/79795335840.pdfIn PDF document text
    • http://yongqingtech.com/d/files/52470721606.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=youth+worker+scenario+questionsPDF 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_off0000ecec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECEC 17240 bytes
SHA-256: 03584a556035c17c6824d4297a5189f9cef7307f0620c97d7fa40dd082d87b0d
font_01_sfnt_off0001196e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1196E 10688 bytes
SHA-256: 5a59adb17e8f4356ca3aca2ef2cadb54e829109337750d8b026a05a0042d8982
font_02_sfnt_off00013203.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13203 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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