Malicious PDF — malware analysis report

Static analysis result for SHA-256 39945e6249cb360d…

MALICIOUS

PDF

86.2 KB Created: 2021-06-30 06:55:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 3e7c7b2162345dcd85011e95d190ad32 SHA-1: caab75ba426edefa39a6e5f3a988b02d7f4baf3b SHA-256: 39945e6249cb360de305e5b8ec403ecd9d7202d752a13711bc691551d21ff679
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous external URIs and link farms pointing to potentially compromised WordPress upload storage and other disposable hosting. The primary attack pattern involves redirecting users to malicious sites, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

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://allytemp.ru/uplcv?utm_term=how+to+get+an+enchanted+stick+in+minecraft PDF link annotation
    • http://berkeleyhigh64.com/clients/9/99/99a482d4bd0dc5522cc24ea7f8204a07/File/sakebodasuzije.pdfIn PDF document text
    • https://oknoplus-omsk.ru/wp-content/plugins/super-forms/uploads/php/files/ada53ac20a68303de5cd3067de12130e/lodapedane.pdfIn PDF document text
    • https://dolmalatrek.com/userfiles/file/97873530128.pdfIn PDF document text
    • https://balajitutorial.com/admin/userfiles/file/vigikadamapoxevaliwabobum.pdfIn PDF document text
    • https://vivekanandbawwa.com/userfiles/file/niwededogoxaluk.pdfIn PDF document text
    • http://cbgnfinance.com/userfiles/file/58327360801.pdfIn PDF document text
    • https://yellowstonewildlife.com/filubulilabobak.pdfIn PDF document text
    • https://jdbailbonds.com/wp-content/plugins/super-forms/uploads/php/files/2f0fdc674b77e021b1aef170757c240a/27264950582.pdfIn PDF document text
    • https://www.skyline-recruiting.com/wp-content/plugins/super-forms/uploads/php/files/3ff2508c639e0178d2584ad0bcde6e29/21798436030.pdfIn PDF document text
    • https://glowskincare.net/wp-content/plugins/super-forms/uploads/php/files/78fbef62cd0e81c7b61ecb9c8fc6b28c/99057383983.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c3d2ff8319b---60717694463.pdfIn PDF document text
    • https://www.etbsupplies.com/wp-content/plugins/formcraft/file-upload/server/content/files/160baf891b0e27---53998695071.pdfIn PDF document text
    • http://ekotop.eu/userfiles/file/31324199336.pdfIn PDF document text
    • https://www.icslights.com/wp-content/plugins/super-forms/uploads/php/files/4ff44ed0349d3d80e9c45d86db138ef1/99404966796.pdfIn PDF document text
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/havmfij09g66idu1fvu81lipd4/zufazurusi.pdfIn PDF document text
    • https://www.pennlighting.com/wp-content/plugins/super-forms/uploads/php/files/0ac15af91e2930a82b789faa08f1772e/9769720354.pdfIn PDF document text
    • https://citytrafik.nu/images/file/zugenexolopulonudufun.pdfIn PDF document text
    • http://barudan.hk/UploadFile/file/20210605224728191.pdfIn PDF document text
    • http://sbox-technology.com/upload/datoteke/85697852502.pdfIn PDF document text
    • http://businessplan-capalpha.eu/mbp/upload/images/images/upload/ckfinder/nipifewixazufom.pdfIn PDF document text
    • http://www.blackhillsdancecentre.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076b0be4369f---xanerakisidom.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_off0000e84d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE84D 18896 bytes
SHA-256: 9e42c92cdc502c702f49e7c160ef5cf95b7c5f7c6ea01d89ea744bc38153dee3
font_01_sfnt_off00011a03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A03 11044 bytes
SHA-256: 20b845078e1c2bd38f34fc824e53f807d9256dfce931086a677b86aa1f3a3157
font_02_sfnt_off0001335b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1335B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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