Malicious PDF — malware analysis report

Static analysis result for SHA-256 46e2f89707a3630f…

MALICIOUS

PDF

87.0 KB Created: 2021-08-17 04:53:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: acf935627f4788ec88611e13f5a84b21 SHA-1: 1c5fb51fbbf6a616aaf27e2abfedc6fefc12bbb7 SHA-256: 46e2f89707a3630f139a85535447384091f608cb99ab423645266c55f1f4f4ea
156 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs, many of which point to compromised WordPress uploads and disposable hosting. This structure is characteristic of a link farm designed to distribute malicious content or phish for credentials. The ClamAV detection and ML classifier further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://rclurie.com/wp-content/plugins/super-forms/uploads/php/files/7b89fe36fee712bd55d836bd11618cbf/91372516612.pdf In PDF document text
    • http://cbelmira.com/wp-content/plugins/super-forms/uploads/php/files/eumgsfj66tj1bv3msvfrsn4t27/13484733264.pdfIn PDF document text
    • https://hattoco.vn/images/ckeditor/files/sexekivirowopozapi.pdfIn PDF document text
    • http://xn--2vxr09c6mc.tw/CKEdit/upload/files/miwuwapebiledepinirol.pdfIn PDF document text
    • http://konstruktor33.ru/app/webroot/files/files/tozade.pdfIn PDF document text
    • http://xn--12cmi2byac9cdhd0hra6d7bxkwbgj1gch.com/user_img/files/82050968997.pdfIn PDF document text
    • http://jjinline.org/file_upload/file/99103451800.pdfIn PDF document text
    • http://www.sensible-seeds-premium.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ca3279340d---22022587327.pdfIn PDF document text
    • http://www.benvenutialmare.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cb1ec8d8f83---lorevabakawaw.pdfIn PDF document text
    • https://ols.lighting/wp-content/plugins/super-forms/uploads/php/files/4894ae9fccbf86a9e9bc1e049eac6ab9/pivamuz.pdfIn PDF document text
    • http://mkconline.com/landmark/ckfinder/userfiles/files/fedewafog.pdfIn PDF document text
    • https://westhigienia.hu/editor_up/83707129050.pdfIn PDF document text
    • http://www.vitrierbxl.be/wp-content/plugins/formcraft/file-upload/server/content/files/1608b1b1690359---sofelitotuwupekogizuma.pdfIn PDF document text
    • https://ubranni.com/uploader/files/xegamusetenilisobotusoda.pdfIn PDF document text
    • https://amirep.com/wp-content/plugins/super-forms/uploads/php/files/f2fdd5541c9f7416445f9eca11f87dec/9021752795.pdfIn PDF document text
    • https://118highschool.am/wp-content/plugins/super-forms/uploads/php/files/89f2a252459a6b54fa6e2d91b72ec61b/wilepidirofilo.pdfIn PDF document text
    • https://x-software.cz/data/file/lujaliwi.pdfIn PDF document text
    • https://airbays.com/userfiles/file/64106604807.pdfIn PDF document text
    • https://www.financedeclined.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160bf6ac5463ba---11227641131.pdfIn PDF document text
    • https://www.caesarstravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b898e328aed---93727462974.pdfIn PDF document text
    • http://amtusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160db0d7c8b88c---powaviwitivogirazujug.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=recien+casados+jaime+camil+pelicula+completa+pelisplusPDF link annotation
    • http://s292376414.onlinehome.fr/datas/imgmail/file/petepusomufumaxadinovasok.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_off0000ec20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC20 10848 bytes
SHA-256: 33993578deb93b6996479daef874f833c3dc30942858eefdf4902b4753ac2928
font_01_sfnt_off0001051c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1051C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011d2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D2E 18692 bytes
SHA-256: 95da37315024c0e5ec8acb274712c17c6e720f55ef91b19bd93b9d612e56ce2f