Malicious PDF — malware analysis report

Static analysis result for SHA-256 08eed9a0e73def7d…

MALICIOUS

PDF

81.0 KB Created: 2021-09-03 20:54:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 55c807e3ac53e1ab11ace10d70fcc7d5 SHA-1: eb2aec17a03fa8d8f4ae515cf0e6070c200c09c0 SHA-256: 08eed9a0e73def7d7f1f7bca877d62822df086b1f883460bf3e821f678628f58
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links pointing to websites hosted on compromised WordPress installations and disposable domains, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://queure.ru/uplcv?utm_term=dogmatismo+e+ceticismo+pdf PDF link annotation
    • https://www.sanier.pl/wp-content/plugins/super-forms/uploads/php/files/kpogbia502bpv5q4kjhvadkcd9/29407306395.pdfIn PDF document text
    • http://hysansam.com/fckeditor/userfiles/image/96387949523.pdfIn PDF document text
    • http://cycling-software.com/files/file/mevisugapewesira.pdfIn PDF document text
    • https://ipcare.nl/wp-content/plugins/super-forms/uploads/php/files/9f264jqq2e43h4atupsj0j3lbe/pukovotumorozaso.pdfIn PDF document text
    • http://sskj.pl/userfiles/file/xemurorafi.pdfIn PDF document text
    • http://gibisch.info/files/files/rubisaweruzogiwakugoro.pdfIn PDF document text
    • https://thealloywheelcentre.co.uk/wp-content/plugins/super-forms/uploads/php/files/dfb7f293e296f286ec090e27ae03819f/87599769928.pdfIn PDF document text
    • http://englishplanet.info/ckfinder/userfiles/files/piwojifibisi.pdfIn PDF document text
    • http://wakingbeauty.com/wp-content/plugins/formcraft/file-upload/server/content/files/160749f724f5f0---jezezinoji.pdfIn PDF document text
    • http://dirpub.org/editor/ckfinder/userfiles/files/78384359641.pdfIn PDF document text
    • http://structurecreative.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d9daf9924b---luzig.pdfIn PDF document text
    • http://masseydogs.com/clients/f/fc/fc2e217ffa4851e49ca3cd921a15cf41/File/rofojopofefokazuwubiri.pdfIn PDF document text
    • http://www.deadclan.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c63ab71b381---falejitolasapobovejope.pdfIn PDF document text
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/73c680a97728fd5f412967d0322bcc3a/26042640074.pdfIn PDF document text
    • http://travelport.pl/userfiles//file/betibafila.pdfIn PDF document text
    • http://eakqshop.com/ckfinder/images_store/files/72562058496.pdfIn PDF document text
    • http://servmed.net/userfiles/file/55360044939.pdfIn PDF document text
    • http://ecofincas.net/ckfinder/userfiles/files/purakofibutitexeletona.pdfIn PDF document text
    • https://hotelritariccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a4aa4304b5c---muxikixikokiraz.pdfIn PDF document text
    • http://kpdb.org/userfiles/files/36737313776.pdfIn PDF document text
    • http://nnk.gr/wp-content/plugins/formcraft/file-upload/server/content/files/16070505fc8f1f---pasovupawubelogabupaw.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_off0000d5fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5FC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ee0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE0E 18752 bytes
SHA-256: d0b24054625f7de2c4665a29e2a019d969ced10edc1025e155a9816920b67ed3
font_02_sfnt_off00011e04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E04 10712 bytes
SHA-256: b2b3315a7a7c2098fb8ed7921290cf31c3e321f026f3f1827deaa569808f788d

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