Malicious PDF — malware analysis report

Static analysis result for SHA-256 d44cbf47c7875977…

MALICIOUS

PDF

96.8 KB Created: 2021-09-07 23:50:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 0ce4f99ba5d74a0932468b78f4e0eb46 SHA-1: d751bcc62684ad2e21e05e149f6d5c04b8d60e81 SHA-256: d44cbf47c7875977daa1b5849a16308c012dbf6958b4c02685ac554a83683da1
156 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, indicating it's a phishing or trojan PDF. It functions as a link farm, with numerous URLs pointing to compromised CMS upload directories, suggesting an attempt to lure users to malicious content. The presence of multiple external URIs and the nature of the hosting point towards a phishing or credential harvesting scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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 http://securitydirect.it/wp-content/plugins/super-forms/uploads/php/files/b1034bba6a54c190da00bcd0221f704f/mapojadexanavujazat.pdf In PDF document text
    • https://iva-vietnam.com/userfiles/file/36535510266.pdfIn PDF document text
    • https://masterpieces-mallorca.com/wp-content/plugins/super-forms/uploads/php/files/8a207074d867849e9b476388e1af9008/vurewuxosad.pdfIn PDF document text
    • https://www.grandiosa.is/wp-content/plugins/super-forms/uploads/php/files/afrejfmau42opogr03dhpmrn17/bowejitolazigimoladem.pdfIn PDF document text
    • https://www.pferde-fuer-unsere-kinder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a29767e6371---gopagi.pdfIn PDF document text
    • https://www.superioreagle.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098580d0d0d8---bajefalivakowogopigima.pdfIn PDF document text
    • http://graphicon.hu/wp-content/plugins/formcraft/file-upload/server/content/files/16080b6090d927---lidajamuvajufo.pdfIn PDF document text
    • http://eduomania.com/wp-content/plugins/formcraft/file-upload/server/content/files/160840ec6352e8---xurumokavamub.pdfIn PDF document text
    • https://gamma-electronics-eg.com/userfiles/files/funabazixupeminezepub.pdfIn PDF document text
    • http://bjerkelunden.org/content/files/userfiles/file///11886329938.pdfIn PDF document text
    • http://teifsepahan.com/files/file/pilof.pdfIn PDF document text
    • https://www.frankreich-ferien.ch/wp-content/plugins/formcraft/file-upload/server/content/files/16097ff6d5d0f4---39490315706.pdfIn PDF document text
    • https://shinyjewellers.com/wp-content/plugins/super-forms/uploads/php/files/b5kiph954fbckvhdftuchasqd6/80624447150.pdfIn PDF document text
    • http://trungtinjsc.vn/upload/FCK/file/92235871241.pdfIn PDF document text
    • https://www.bouldersudbury.org/wp-content/plugins/formcraft/file-upload/server/content/files/16113a21a7411c---34835773151.pdfIn PDF document text
    • http://jrmhandling.nl/upload/file/4734739031.pdfIn PDF document text
    • http://ciaooo.ru/uploades/userfiles/file/83613317437.pdfIn PDF document text
    • https://tipresentoio.it/images/file/gakezetubuzadorefupojed.pdfIn PDF document text
    • http://locthanhroyal.com/upload/files/sapodapusedefejakonejofez.pdfIn PDF document text
    • http://hangnhatbanonline.com/upload/files/69147905699.pdfIn PDF document text
    • https://web-sila.ru/wp-content/plugins/super-forms/uploads/php/files/46aca407cc9ecb73642596fcd31cd7b5/duvibawoxaseketosi.pdfIn PDF document text
    • https://equalitas.es/userfiles/file/ludepor.pdfIn PDF document text
    • http://www.aadhar-interior.com/userfiles/file/wigazawanokav.pdfIn PDF document text
    • https://gpagroup.in/wp-content/plugins/formcraft/file-upload/server/content/files/16098440ee6125---dimetesejetiluxodusow.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=libro+maestros+de+la+costura+pdf+gratisPDF 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_off00010b33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B33 11056 bytes
SHA-256: d996a23a5abb2fa025da722a7e9f487413cc1f57e772a1fb7ffd3eb0c6fe6acf
font_01_sfnt_off0001248f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1248F 22164 bytes
SHA-256: e75ad4f352ae7d5212ed8746f02a04df6b145164231f548baaae811f44c11499
font_02_sfnt_off00015d35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15D35 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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