Malicious PDF — malware analysis report

Static analysis result for SHA-256 e58322ab03f732e3…

MALICIOUS

PDF

98.3 KB Created: 2021-07-30 10:38:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 2152595b4096863782d55aa47e56edd7 SHA-1: be6dc50430e6814878a7cc01832b561f717030e0 SHA-256: e58322ab03f732e3e3de72a944ff0e94e7425cd86d29bf60f044b91a77951d5b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains a link farm with numerous URLs pointing to compromised WordPress sites, likely serving as a redirector to malicious content. The presence of these links and the overall detection indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://krisoc.ru/uplcv?utm_term=las+50+sombras+mas+oscuras+de+grey+pelicula+completa+youtube PDF link annotation
    • http://penoplex24.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160b73828ee556---61960038440.pdfIn PDF document text
    • https://www.simcoerecovery.net/wp-content/plugins/super-forms/uploads/php/files/qmqhgc2qc3egdov9qptoc0k8kn/bewipebubibinawupireb.pdfIn PDF document text
    • https://exihomes.com/userfiles/files/18384426385.pdfIn PDF document text
    • http://sjar-tech.com/uploadfile/file///2021052914511743.pdfIn PDF document text
    • https://zemiigori.com/uploads/file/1293773116.pdfIn PDF document text
    • https://muzeumkonstancina.pl/attachments/file/79521355566.pdfIn PDF document text
    • http://www.akutrans.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ab512978e1---dorivisopanod.pdfIn PDF document text
    • https://www.servicioscalibrados.com/wp-content/plugins/super-forms/uploads/php/files/ad839f3e57ad0c001e67cfefeb75463d/vikopuz.pdfIn PDF document text
    • https://thriveelearning.com/wp-content/plugins/super-forms/uploads/php/files/661bf43ee78f47825b2ba598980f7e58/volurufekenez.pdfIn PDF document text
    • https://www.peeryhotel.com/wp-content/plugins/super-forms/uploads/php/files/f70e6268a5cbdf2b8d5185aeff8614e5/novigezipojexidagebafosol.pdfIn PDF document text
    • http://longarmacademy.net/fckeditor/userfiles/file/97066329338.pdfIn PDF document text
    • http://nhasachnguyenvancu.com/Images_upload/files/45052047808.pdfIn PDF document text
    • http://www.victorian-manor.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160c5144ae0369---povoma.pdfIn PDF document text
    • https://ahha.az/userfiles/file/11460359571.pdfIn PDF document text
    • http://landonintergroup.com/ckfinder/userfiles/files/32561652504.pdfIn PDF document text
    • http://hoondb.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096af783d522---67402233919.pdfIn PDF document text
    • https://www.fmworks.com.tr/wp-content/plugins/super-forms/uploads/php/files/rdu30u8hr91nh8bu39cmtp4s2l/28309322763.pdfIn PDF document text
    • https://amrapalispot.com/userfiles/file/12816609736.pdfIn PDF document text
    • http://phyllisrubensteinlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/rorisizamupob.pdfIn PDF document text
    • https://marciasmithconsulting.com/wp-content/plugins/super-forms/uploads/php/files/c101f17708a684f6dd581a950e8bcc12/tavukiwezerixakolig.pdfIn PDF document text
    • https://atpl.aero/ckfinder/userfiles/files/92710100020.pdfIn PDF document text
    • http://maciejabramowicz.pl/upload/files/file/86110910979.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_off000116a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116A9 11320 bytes
SHA-256: f8f7c56d70787cea843c2e1b024c85928d6753880a8359a44959c56035f3c33b
font_01_sfnt_off000130f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x130F4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014906.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14906 18792 bytes
SHA-256: 80123cacaa81a4cdbcc249c571fa71163925d5796e06f9e378dfea8423545203

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