Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ff786f2c2152047…

MALICIOUS

PDF

99.9 KB Created: 2021-07-21 22:16:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: a81d1b59ca8359d881446c6bbfda6c43 SHA-1: 10e0a8e117c785407f15d5cc59407be668d6fd72 SHA-256: 6ff786f2c2152047b55a9ae6908879a8f6108caea8ccdcb151e1bad63389bf9f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains a link farm pointing to multiple compromised WordPress sites, suggesting an attempt to redirect users to malicious content or phishing pages. The presence of numerous unknown URLs indicates a broad distribution effort.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9979

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://fatheragneliti.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b614bb3bc76---sojul.pdf In PDF document text
    • http://socialbomjesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606cdf8d86a0a---27472016836.pdfIn PDF document text
    • https://acavacecio.it/userfiles/files/gofurididub.pdfIn PDF document text
    • https://www.groupenahno.com/wp-content/plugins/super-forms/uploads/php/files/rfst8qtfngv21fln80k1gj827d/2420305744.pdfIn PDF document text
    • https://www.kbstephens.com/wp-content/plugins/super-forms/uploads/php/files/0488afe5b153626d0de5ea4d481e15f9/20693075565.pdfIn PDF document text
    • https://www.couleurs-et-jardin.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16097a23b45583---49455125785.pdfIn PDF document text
    • https://bwawarszawa.pl/upload/file/watuti.pdfIn PDF document text
    • https://aadhaarretail.com/administrator/imagetemp/file/tozibapilavosujuxepuxemo.pdfIn PDF document text
    • http://xn----8sbxab3abskk3a2j.xn--p1ai/media/file/73349055774.pdfIn PDF document text
    • https://realestateconnect.biz/wp-content/plugins/super-forms/uploads/php/files/m870er9hsjl3ha3cc56ghlimb3/lanomosesoxumigurixemo.pdfIn PDF document text
    • http://pattonbrayboy.com/clients/8/84/8444fd18e659e4cf0f5d78ff5dcadce3/File/11957789586.pdfIn PDF document text
    • https://fiberglasssupplydepot.com/userfiles/file/pevupurage.pdfIn PDF document text
    • https://www.certificagreen.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac9563e9169---43553781818.pdfIn PDF document text
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/nc788bb1q65tfj1v6md5i4n8r3/binajibur.pdfIn PDF document text
    • http://videoacceso.com/wp-content/plugins/formcraft/file-upload/server/content/files/160723e1e8bb87---64571822823.pdfIn PDF document text
    • http://belgium-ex.com/images/blog//file/fumitoloxebunudodo.pdfIn PDF document text
    • http://tubietelbar.hu/uploadfile/nufobulosixumutuxowe.pdfIn PDF document text
    • http://www.driftime.ee/wp-content/plugins/formcraft/file-upload/server/content/files/1607c47f180f75---47674957835.pdfIn PDF document text
    • http://arch-teh.com/pic/userfile/59340246488.pdfIn PDF document text
    • http://retroldn.com/userfiles/file/91908648072.pdfIn PDF document text
    • http://areaengineeringsrl.eu/userfiles/files/78763041162.pdfIn PDF document text
    • http://pansophers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ce7db3ab7a---posolaga.pdfIn PDF document text
    • https://www.simcoerecovery.net/wp-content/plugins/super-forms/uploads/php/files/btq4qgbjneaea2su2nngrglrsf/75629514630.pdfIn PDF document text
    • http://seibyou-koujien.com/files/files/wuzijurijudetixujo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=8+habits+of+highly+effective+people+pdfPDF 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_off00011e6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E6E 11124 bytes
SHA-256: b71c6c1ee31bde67ef5799384fcc686b3601a1537a565e58280d8b38dd8cf273
font_01_sfnt_off00013832.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13832 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00015044.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15044 18916 bytes
SHA-256: f0190570e3415cf72d783c58a1661589238ca6001e28f0ba807e10e1fae8d8a6