Malicious PDF — malware analysis report

Static analysis result for SHA-256 6aa3c68c39364ea0…

MALICIOUS

PDF

129.6 KB Created: 2021-05-06 16:05:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 7a1e3d41af187bdc5afa28e41f658d8d SHA-1: d2a54604ff8cf539a636c5829e14ca02489c28b0 SHA-256: 6aa3c68c39364ea04e76d56647899baf6b9c5366c604a5e119c7fa090202fec8
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many of which point to compromised WordPress sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The presence of a link farm on potentially compromised infrastructure suggests an attempt to obscure the final destination and evade detection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://synerhu.ru/uplcv?utm_term=idolmaster+side+m+guide PDF link annotation
    • http://dirabrealtors.com/wp-content/plugins/formcraft/file-upload/server/content/files/160800aaaab741---93043438920.pdfIn PDF document text
    • http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/ftq0v8hi7n7piludp95hfeghp0/folugenevojowifisif.pdfIn PDF document text
    • https://pinotcar.com/wp-content/plugins/super-forms/uploads/php/files/5efd94a525d22a36b0ab4bbc11990a4a/50409318748.pdfIn PDF document text
    • http://www.idenet.net/wp-content/plugins/formcraft/file-upload/server/content/files/160712401424c2---wafumib.pdfIn PDF document text
    • https://anukulagrotech.com/userfiles/file/webipovorenunomosu.pdfIn PDF document text
    • https://glowskincare.net/wp-content/plugins/super-forms/uploads/php/files/f942bce28d12df42e58702853b1a8856/pupuxopujomojeborasamaxom.pdfIn PDF document text
    • http://erfolgsapp.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606cd724f179f---11358479335.pdfIn PDF document text
    • http://ophtalmic-overnight.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1608a79283b75b---tozimudagasogisuxebefat.pdfIn PDF document text
    • http://vdgairconditioning.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608ddc6814323---jibikeza.pdfIn PDF document text
    • https://www.ogblfrontaliers.fr/wp-content/plugins/super-forms/uploads/php/files/5e67r6j60eu12no1uotb7k2s6g/27753484254.pdfIn PDF document text
    • https://stakeoutllc.com/wp-content/plugins/super-forms/uploads/php/files/88bb8a946cb1dda7fdc18cc8c66449f9/86838392549.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607ad0fe7d5c9---67825939214.pdfIn PDF document text
    • http://photographybynami.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085593cd9a4a---kufodevagifevoletugejib.pdfIn PDF document text
    • http://activesolutionelectric.com/images/file/poxosexexom.pdfIn PDF document text
    • https://victory-agency.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075ba36090ce---kalulivuvasetefo.pdfIn PDF document text
    • http://schouteninterieurwerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1606f2d09ba566---85388108155.pdfIn PDF document text
    • https://c4ir.ae/wp-content/plugins/super-forms/uploads/php/files/d54s9rpvd7bnmc23ae3avsamv4/fisem.pdfIn PDF document text
    • https://theshairpodcast.com/wp-content/plugins/super-forms/uploads/php/files/5a093cb5c6dd6d9e2fb2ed8cee9fb6f4/gupatixofumomewebaxode.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In 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://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00014d1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14D1B 25524 bytes
SHA-256: 020577f81ab5a5b4dc84e7143cfe8484404a5cf32f6211c23346c616a7310497
font_01_sfnt_off00019dad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19DAD 4856 bytes
SHA-256: 412a7d3e33f47833ebf0d74e29f1198d5bf31639b7dda95f8897ea9cf5f9756d
font_02_sfnt_off0001ae2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1AE2C 11352 bytes
SHA-256: 34e91f868da49aa490e404b5ddd9b4d0cf12d2be021f51f8f639db3097e91cf5
font_03_sfnt_off0001d4b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D4B5 16324 bytes
SHA-256: 102c4ce27c3892b1d9c79a1e33b79692c53c519becfe9ee3616e7c36ca68709c
font_04_sfnt_off0001ea5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1EA5E 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

Open this report in the interactive analyzer, or submit your own file for analysis.