Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5f46e3f31cca35a…

MALICIOUS

PDF

79.4 KB Created: 2021-08-24 22:53:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 1818e1d9b09dbfc5a99fac5b561d7377 SHA-1: 24d89293b561ed60a18a6cc3386aa51000eaebc2 SHA-256: f5f46e3f31cca35ab1e98f4790d950ed2d10cb7a7cc7b10b7e07121d9b15156b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, indicating a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware delivery via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://pistant.ru/uplcv?utm_term=yellow+cab+company+phone+number PDF link annotation
    • https://drisraadentalcenter.com/userfiles/file/sibijaku.pdfIn PDF document text
    • https://boldvision.tv/wp-content/plugins/formcraft/file-upload/server/content/files/160d5d67cb6775---26673745500.pdfIn PDF document text
    • http://re-view.online/fckFiles/file/44727562527.pdfIn PDF document text
    • http://placc.info/up_image/pozanutiburetugaf.pdfIn PDF document text
    • http://xn--49s538bo8ux8c.net/userfiles/file/3825350688.pdfIn PDF document text
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/6bf0925ebee710e63f4a00b7e647fd41/lebazamapikebunilizifufo.pdfIn PDF document text
    • https://xn-----6kcabagcgfjsxjciriy6alkh6a7aqk.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/d69a6de6e5c6c456742b149f369b79e4/69817616466.pdfIn PDF document text
    • https://aiaciran.org/cache/fck_files/file/42112409523.pdfIn PDF document text
    • http://bogelaipigeon.com/upload/file/moxopitol.pdfIn PDF document text
    • https://haysalon.com/public_html/userfiles/file/kukujuzatexu.pdfIn PDF document text
    • http://kwong-cheong.com/userfiles/wafose.pdfIn PDF document text
    • https://globalclassic.org/wp-content/plugins/super-forms/uploads/php/files/pnnuivqhe7o8nlrmjdvrhqnopt/tebuxemezozajatepivokir.pdfIn PDF document text
    • https://plswa.com/wp-content/plugins/super-forms/uploads/php/files/27f95f85fcafcdefb9118978cc0215fc/fazojis.pdfIn PDF document text
    • http://aahsclassof1978.com/clients/b/b6/b6117739535924054831d33ecd54b00a/File/19626293241.pdfIn PDF document text
    • http://www.unidacardoso.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16077bc055ce8d---palovufovudolabadimifi.pdfIn PDF document text
    • http://savoie-outils-coupants.com/ckfinder/userfiles/files/67230744206.pdfIn PDF document text
    • https://discovercefalu.com/_data/images/file/29119681699.pdfIn PDF document text
    • http://headrepublic.pl/images/files/43189133243.pdfIn PDF document text
    • https://harpethvalleyhealth.com/wp-content/plugins/super-forms/uploads/php/files/c811fce5aa2192a44e7814fdf7712ab3/poxagazojife.pdfIn PDF document text
    • https://mziagroup.com/wp-content/plugins/super-forms/uploads/php/files/k3af2rs1dpbmuq415blr1f2008/tenobipulas.pdfIn PDF document text
    • http://www.combatsim.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16095b1f2d2b65---34364046143.pdfIn PDF document text
    • http://inwama4.vn/webroot/img/files/4198214100.pdfIn PDF document text
    • https://sketchup360.vn/wp-content/plugins/super-forms/uploads/php/files/9cstg9g0ddd8tqdb0l1qle6nf5/ropefiluzopoxukasezivu.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_off0000d3d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3D8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ebef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBEF 10704 bytes
SHA-256: 00d557a0101bd8f41fb0ee8d045caf66168658b673aadb2a1817a9c664d187ea
font_02_sfnt_off00010416.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10416 16804 bytes
SHA-256: 420c52be70e11dd8bcc2f9014fdbc173c09e89e3300a752ed85771e6b84c0265