Malicious PDF — malware analysis report

Static analysis result for SHA-256 058125a2be0f7eee…

MALICIOUS

PDF

71.0 KB Created: 2021-07-02 03:35:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: e250a8d5ca7cce83345a6cffb9ec8de4 SHA-1: 87ed87ad2e87bd88bafc4bfba853e679d90044af SHA-256: 058125a2be0f7eeee54b2a18ce5f3fb80f298a2983c0bbdfdb2cec26a97c4f90
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a high-confidence ML classifier and ClamAV detection. It contains a link farm with numerous URLs pointing to compromised WordPress sites and disposable hosting, suggesting an attempt to distribute phishing content or malware. The presence of embedded URLs and the overall structure indicate a malicious intent to lure users to external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://chcial.ru/uplcv?utm_term=edh+first+sliver PDF link annotation
    • http://aaz.sk/editor_uploads/files/wepixewevozetajita.pdfIn PDF document text
    • https://apexforestservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086afa5de5b2---92291058589.pdfIn PDF document text
    • https://www.helmmsp.ca/wp-content/plugins/super-forms/uploads/php/files/acbbe255b6f708e774e7f0f3c9db1bec/9424335640.pdfIn PDF document text
    • https://www.olympusnorge.no/wp-content/plugins/super-forms/uploads/php/files/tjr7ju79shqv3fgpr03efkcr66/44381383185.pdfIn PDF document text
    • https://smarttactic.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1608bbb23ecd50---4005129472.pdfIn PDF document text
    • https://wamsconference.com/wp-content/plugins/super-forms/uploads/php/files/90d4a9bafb04b8125fe44732b9e42fb0/53083506769.pdfIn PDF document text
    • http://www.mtpartnersfl.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab097b7ce1a---nodomune.pdfIn PDF document text
    • https://www.alignerco.ca/wp-content/plugins/super-forms/uploads/php/files/9a15e7b1fa9afe95e3b3ef04b38737c6/71285431773.pdfIn PDF document text
    • http://kayapaliinsaat.net/file/satetikijabide.pdfIn PDF document text
    • http://beckydavidsonhomes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d9e2ffd824a---24371386291.pdfIn PDF document text
    • https://www.hintonassociates.com/wp-content/plugins/super-forms/uploads/php/files/32a61ea865bcab8df52811366e678d55/penibepogofijew.pdfIn PDF document text
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/ogqsvnj1svd0cuiibo3u82em33/desiberivoz.pdfIn PDF document text
    • https://espiber.cl/images/uploadedimages/file/53356033104.pdfIn PDF document text
    • https://palcev.ru/userfiles/file/24279506779.pdfIn PDF document text
    • http://global-insurance-broker.de/downloads/fizoribati.pdfIn PDF document text
    • http://nhadatv.com/webroot/img/files/fezajesobovibekuwitiv.pdfIn PDF document text
    • https://www.andyselfstorage.co.uk/wp-content/plugins/super-forms/uploads/php/files/hn9u98o49eum5j9fafifqifplt/tarabegumamenodul.pdfIn PDF document text
    • https://sweetburden.com/upload/users/files/jidetawiporimuj.pdfIn PDF document text
    • https://apoc.com.au/wp-content/plugins/super-forms/uploads/php/files/1372af95008afd3dc516a8846497fa53/pubazub.pdfIn PDF document text
    • http://delannahotel.com/user_img/file/18040761915.pdfIn PDF document text
    • http://everest-c.ru/ckfinder/userfiles/files/10137687080.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_off0000b6f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB6F3 16200 bytes
SHA-256: b055b9a85959feac937ed858fa0ecffc859c3c6160e8f48791cec8292de28df9
font_01_sfnt_off0000e0ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0AC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f8c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8C3 10112 bytes
SHA-256: ce8401c26f289319d79b1624ab4f98b65cbffab42f95636b76af2378639031af

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