Malicious PDF — malware analysis report

Static analysis result for SHA-256 fcbd2dc37bb15881…

MALICIOUS

PDF

80.5 KB Created: 2021-09-17 18:43:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 58eedff22670a12911658d24d85f8232 SHA-1: 8db70b759b2484ad8b3085a346301486466b2e87 SHA-256: fcbd2dc37bb15881945008e65b287c2461f29b86114a037ad48a3a0d117c0dfe
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ML classifiers and ClamAV as malicious. It contains numerous embedded URLs, many pointing to compromised WordPress sites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of `utm_term` parameters in some URLs indicates a phishing or SEO-poisoning campaign. No scripts were extracted, but the overall structure and URL distribution strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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://irlanc.ru/uplcv?utm_term=cartoon+city+2+apk PDF link annotation
    • https://www.landalastadservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/161393cf6b29c5---pemijikebasulaxoro.pdfIn PDF document text
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/1a14543fa3fa52a10608db38be44cb20/pomudodezag.pdfIn PDF document text
    • http://autosoftware.company/autoresponders_images/files/28857929239.pdfIn PDF document text
    • https://skywaynepal.com/userfiles/file/nefepud.pdfIn PDF document text
    • http://sparan-art.ru/ckfinder/userfiles/files/35470767723.pdfIn PDF document text
    • https://vroa.pl/chplusfiles/file/fipufate.pdfIn PDF document text
    • https://onlinendttraining.net/files/52951236453.pdfIn PDF document text
    • http://terrietanaka.com/library/files/49428820163.pdfIn PDF document text
    • https://carthink.org/wp-content/plugins/formcraft/file-upload/server/content/files/16130cff04b08d---61323192960.pdfIn PDF document text
    • http://studiosantomauro.it/userfiles/files/jezuwifelexelupe.pdfIn PDF document text
    • https://www.studiorosaliabusco.it/ckfinder/userfiles/files/fotorugaxoz.pdfIn PDF document text
    • http://eastcity.hu/ufiles/file/jedazogaxomev.pdfIn PDF document text
    • https://maconlux.lu/userfiles/files/10374688167.pdfIn PDF document text
    • http://zssadkowice.pl/pliki/zorodawo.pdfIn PDF document text
    • http://kozszemle.hu/uploads/files/forijabusekitanem.pdfIn PDF document text
    • http://putzlappenborner.at/editor_up/gipasinisutebepave.pdfIn PDF document text
    • http://flexinform.com/hirlevel/file/tebav.pdfIn PDF document text
    • http://tostonet.cl/ckfinder/userfiles/files/faxowapuwuxaxagedovibij.pdfIn PDF document text
    • http://xn----8sbaqfskngn1qi.xn--p1ai/userfiles/file/38257668496.pdfIn PDF document text
    • https://mcdelandes.ca/uploads/file/14750401058.pdfIn PDF document text
    • http://musicfriend.vn/public/default/ckeditor/files/jexupogorav.pdfIn PDF document text
    • http://ipayon.com/root/FCKeditor/file/36715483455.pdfIn PDF document text
    • https://tanhaithanhvalves.com/quangcao/admin/file/javuleges.pdfIn PDF document text
    • https://hcs1000.org/wp-content/plugins/super-forms/uploads/php/files/b7c918978308e668da3e16f725971bba/xudefalof.pdfIn PDF document text
    • http://climtech.com/files/files/jenebujokefulozi.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_off0000d5d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5D1 18308 bytes
SHA-256: f8ede5821586fef40d430098c859728865b71a64f6f8bcb055c90245f3bccd27
font_01_sfnt_off000104b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104B3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011cca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CCA 10380 bytes
SHA-256: 09c8785c68a485bba82d2d84a9b5067ac119bacaf3ec17f7caa43264cf359ed0

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