Malicious PDF — malware analysis report

Static analysis result for SHA-256 27c46c35e71a9623…

MALICIOUS

PDF

76.9 KB Created: 2021-09-05 23:10:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 7877038ba3e783b5f5dfd03bb6129ef6 SHA-1: e8ae10a0c8d94e38335f3fd941be9943bd2f6f32 SHA-256: 27c46c35e71a9623bd95b5a74d7fd55e5f99261136fb41b22add9271313a6b47
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. It contains numerous links pointing to compromised WordPress sites and other disposable hosting, suggesting a phishing or malware distribution campaign. The presence of external URIs and link farms indicates an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://garglob.ru/uplcv?utm_term=huepar+laser+level+manual PDF link annotation
    • http://midiabyz.com/wp-content/plugins/super-forms/uploads/php/files/eaf9a0ab3718a96bd60f29e70ba459a5/rogiroxulinilefuzijanewoz.pdfIn PDF document text
    • http://www.nbrownies.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16082de7083071---jumozowepanopo.pdfIn PDF document text
    • https://www.peeryhotel.com/wp-content/plugins/super-forms/uploads/php/files/6a8a31078e7b55388ff0e8efc5c62377/8501407998.pdfIn PDF document text
    • http://allamericannursing.com/userfiles/file/57921678260.pdfIn PDF document text
    • https://dungcuruamui.com/wp-content/plugins/super-forms/uploads/php/files/bnrfgro0i02kbanee43s166kf3/pelutakatit.pdfIn PDF document text
    • https://levin-dent.ru/wp-content/plugins/super-forms/uploads/php/files/306b12df054c82684299bc0aa9fbb276/bevuzonuginuwizomabow.pdfIn PDF document text
    • https://hkbca.org/UploadFiles/file/20210721214158117.pdfIn PDF document text
    • https://aadhaarretail.com/administrator/imagetemp/file/60614664228.pdfIn PDF document text
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/cknqadifhl724evar3ulrgqe66/29066618891.pdfIn PDF document text
    • http://elearning-chemistry.ro/userfiles/file/jopolejiler.pdfIn PDF document text
    • http://ipublicity.cz/data/file/murajumemegu.pdfIn PDF document text
    • https://www.okcfarmersmarket.com/wp-content/plugins/super-forms/uploads/php/files/0a8f6d7185dcf9fcb4673a23c37d0b83/zilelanu.pdfIn PDF document text
    • http://www.thelawchamber.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611c669588887---kurufomavanu.pdfIn PDF document text
    • https://www.geosuiteonline.de/wp-content/plugins/formcraft/file-upload/server/content/files/160751d0b4817a---lusizebijorigukorobal.pdfIn PDF document text
    • https://alutat.com/data/file/naxupuweduzu.pdfIn PDF document text
    • http://irmascaritasdejesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1612d19d28934d---lokomizutotivazan.pdfIn PDF document text
    • http://geodez.com/pliki/file/fajimutiwuzafedos.pdfIn PDF document text
    • http://www.mostex.sk/files/articles/file/11069729719.pdfIn PDF document text
    • http://www.magicapro.it/wp-content/plugins/formcraft/file-upload/server/content/files/160bf6f42a6700---puxapiboluman.pdfIn PDF document text
    • http://www.linkkorea.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/160bc7562a3c85---paxatiwanomu.pdfIn PDF document text
    • http://bestforfishing.com/wp-content/plugins/super-forms/uploads/php/files/bab9012b653972c7b186665f84493070/waloguroxarifibumut.pdfIn PDF document text
    • https://eviinstall.com/userfiles/files/dumivazugawuworokuruv.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_off0000c91a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC91A 10260 bytes
SHA-256: cb73f732360531e7f8105e8b68bb19f087c0162bd63242180c91beb0f1ec7a3c
font_01_sfnt_off0000e021.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE021 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f833.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF833 17652 bytes
SHA-256: 016014953ffcd46011320147dbe84217612dbb65a74f73201b4fd87d9af3ed37

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