Malicious PDF — malware analysis report

Static analysis result for SHA-256 058406c7ce17506e…

MALICIOUS

PDF

86.8 KB Created: 2021-09-17 13:46:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: ac65cafb11bee8eb76e7c7bc265298e8 SHA-1: 7f85d5c234fcecdcadfb5db4d1558391164f0eae SHA-256: 058406c7ce17506ee8d275e854e4b412cec57c2f0a9fb30740e8a48f8b8cc49a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs that point to compromised WordPress upload storage and other disposable hosting, suggesting a link farm designed to redirect users to malicious sites. While no scripts were explicitly extracted, the nature of the embedded URLs and the heuristic firings strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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=how+long+can+you+keep+raw+chicken+refrigerated PDF link annotation
    • https://sistemagestiondpr.com/userfiles/file/59948348503.pdfIn PDF document text
    • http://fzcce.com/aimgs/uload/files/vaxozo.pdfIn PDF document text
    • https://powerliteaac.com/userfiles/file/wukesi.pdfIn PDF document text
    • http://warmistore.com/userfiles/file/kuvoxilewefaxilopojot.pdfIn PDF document text
    • http://przystaneknida.pl/data/aktualnosci_imgs/file/gikinupotepupelokisogu.pdfIn PDF document text
    • https://capitalsyndic.com/userfiles/file/loxetokunamemotixas.pdfIn PDF document text
    • http://flooroverstock.com/admin/userfiles/file/88250111000.pdfIn PDF document text
    • https://khambenhxahoi115.com/images/files/sikudiguju.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614229b1bb8f4---78636901593.pdfIn PDF document text
    • http://autolavaggiocraparotta.it/userfiles/files/lakukozutomukomesudosilev.pdfIn PDF document text
    • http://westfallassociates.com/documents/file/22382035102.pdfIn PDF document text
    • https://machnik.net/ckfinder/userfiles/files/jojomesebiladabevoxujow.pdfIn PDF document text
    • http://puzynowska-kancelaria.com/userfiles/file/jafivokejolutododu.pdfIn PDF document text
    • https://robertmatzuzi-massagetherapist.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/161407ece6a90b---49236933710.pdfIn PDF document text
    • https://curewelldiabetes.com/userfiles/file/fusumokowipon.pdfIn PDF document text
    • http://adasbruiloften.nl/userfiles/file/jitemupimisigekepamanar.pdfIn PDF document text
    • https://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c508d7e583---lapenobagonixidan.pdfIn PDF document text
    • http://vititanon.com/user_img/files/zegareruxafozil.pdfIn PDF document text
    • https://beamstraffic.com/amb/userfiles/file/6536769735.pdfIn PDF document text
    • https://fminterativa.net/cms/plugins/ckfinder/userfiles/files/85862489317.pdfIn PDF document text
    • https://glearningsolutions.com/userfiles/files/71097098555.pdfIn PDF document text
    • https://jokerprod.net/userfiles/file/bomalesiramukodikinenekok.pdfIn PDF document text
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/fcb29d842c4bf98799e4ac4f264cdc0c/23415279288.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_off0000ebf5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBF5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010407.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10407 18252 bytes
SHA-256: ee2409bd625861d7931c3a7b1213e9ed28da1c83abc3118bfb85c816ce90425b
font_02_sfnt_off000133a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x133A6 11112 bytes
SHA-256: c66fd612b136f39b05cca29f08ab0da724dbc0fb53abfdaaeb72c40436815589

Open this report in the interactive analyzer, or submit your own file for analysis.