Malicious PDF — malware analysis report

Static analysis result for SHA-256 e375bc9d8b2fde61…

MALICIOUS

PDF

88.8 KB Created: 2021-08-20 05:53:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 70e186ecdb9ed5754a19c7063c102ea1 SHA-1: b1b92a68588ed308e07785a439690e9485e6c4d8 SHA-256: e375bc9d8b2fde61a3d6151c391233afa1dac5cbca7dfcedc54066dc8a673b04
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, specifically identified as a phishing trojan by ClamAV. It functions as a link farm, containing numerous URLs that point to various websites, some of which are hosted on compromised CMS platforms. The primary purpose appears to be directing users to potentially malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

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://crewmak.ru/uplcv?utm_term=formato+de+acta+constitutiva+de+sociedad+en+comandita+simple+mexico PDF link annotation
    • https://diarch.in/WYSIWYGImage/file/kiduromuvolejafejuji.pdfIn PDF document text
    • https://sitebyside.ru/wp-content/plugins/super-forms/uploads/php/files/37f9ba9730e410573e4e5135f0511b91/62284812307.pdfIn PDF document text
    • https://muacash.com/webroot/img/files/81322290710.pdfIn PDF document text
    • http://mengnuanua.com/app/webroot/files/files/71616429264.pdfIn PDF document text
    • https://viscom.bg/uploads/wysiwyg/files/baxifamen.pdfIn PDF document text
    • http://skupka23.ru/upload/m/66237639864.pdfIn PDF document text
    • https://areshin.ru/wp-content/plugins/super-forms/uploads/php/files/2eeeae0f19b32900abeb9c6a223edcc3/49216223471.pdfIn PDF document text
    • http://5m-tti.com/uploads/image/files/wegiwax.pdfIn PDF document text
    • https://alkalacarservice.com/public_html/userfiles/file/90066184037.pdfIn PDF document text
    • https://www.saltriot.com/wp-content/plugins/super-forms/uploads/php/files/c445ef8cf276c302c7087283a2a5396b/60985067749.pdfIn PDF document text
    • http://aotwresort.net/ckfinder/userfiles/files/42021685507.pdfIn PDF document text
    • http://kxqcgs.net/filespath/files/20210817104721.pdfIn PDF document text
    • http://sicilyontable.it/userfiles/files/41955814599.pdfIn PDF document text
    • http://perseverance.cyou/updatefiles/file/wawurinubeke.pdfIn PDF document text
    • https://vieclamxaydung24h.com/upload/files/94385756314.pdfIn PDF document text
    • http://aivieksteslaivas.lv/userfiles/file/74224731805.pdfIn PDF document text
    • https://fleschimmo.lu/userfiles/files/vumibilofesa.pdfIn PDF document text
    • http://elosc.com/upFile/file///ITX202108180102176347.pdfIn PDF document text
    • http://barcelonasixtytwo.com/userfiles/file/tolukamurelofavarati.pdfIn PDF document text
    • http://botanicgardenscafe.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160b8971c1921a---50358159518.pdfIn PDF document text
    • https://vdbergelectro.nl/wp-content/plugins/super-forms/uploads/php/files/13dde28d8b6651a6174267113e1a0cc0/fajiwubosuvuwux.pdfIn PDF document text
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/ec9835e1a6ae78ba33b69acc6024d718/64517224183.pdfIn PDF document text
    • https://yidinfo.net/wp-content/plugins/super-forms/uploads/php/files/97j1ush4enae4n2hjgt1i11ouu/6919046933.pdfIn PDF document text
    • http://www.restorationservice.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16092fdc81269b---62942157697.pdfIn PDF document text
    • http://brodart01.com/wp-content/plugins/super-forms/uploads/php/files/k0h71pup2quv23156e63fgbenl/runidigonakevajodofo.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_off0000f3db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3DB 10920 bytes
SHA-256: 8a66d702d9a1f4426097d5890b44938ed721abeb084e6e2e8f27b0ac95754c18
font_01_sfnt_off00010d22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D22 17472 bytes
SHA-256: 4f21f0227fa41732861ba94ec292187b4d0d961642d16c58b6537804b6407dd6
font_02_sfnt_off000139d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x139D2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1