Malicious PDF — malware analysis report

Static analysis result for SHA-256 60f0cc9832c95d87…

MALICIOUS

PDF

75.5 KB Created: 2021-09-15 17:17:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: df53f191000537d4ce4f85af39c5f031 SHA-1: cc8b3c47067a1045c06b8146deae02fb229dca8e SHA-256: 60f0cc9832c95d87ffa23e9402c7aefcbe4383e510158b7a19cf875b18bb8faa
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external links, many pointing to disposable hosting or compromised WordPress sites, suggesting a phishing or malware distribution lure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to a phishing campaign or a downloader for further malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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=friv+2018+fortnite PDF link annotation
    • http://files.ibiza-ferien.de/file/70378604723.pdfIn PDF document text
    • http://thibidi.vinadesign.info/uploads/images/files/83088869009.pdfIn PDF document text
    • https://darkoyunpin.com/calisma2/files/uploads/71911251052.pdfIn PDF document text
    • https://wecareu.net/ckfinder/userfiles/files/44116910960.pdfIn PDF document text
    • http://www.zav-mito.si/wp-content/plugins/formcraft/file-upload/server/content/files/161412bed603c9---73595250187.pdfIn PDF document text
    • http://hugslock.com/app/webroot/img/files/29721552520.pdfIn PDF document text
    • http://nieruchomosci-swidnica.pl/userfiles/file/jixebusorivawawuluzewi.pdfIn PDF document text
    • http://sh8ke.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612ef25ed6494---55081529135.pdfIn PDF document text
    • http://www.anieliasfx.com/uploads/textareas/file/gadusodulikulegeb.pdfIn PDF document text
    • http://gasasosong.com/upload/fckeditor/file/jimeginagisag.pdfIn PDF document text
    • https://andrejc.si/files/file/befupezasipoma.pdfIn PDF document text
    • http://hefei.chinatupai.com/web/js/ckfinder/userfiles/files/57612141321.pdfIn PDF document text
    • https://theshamrockpublecco.it/file/35486288882.pdfIn PDF document text
    • https://sketchup360.vn/wp-content/plugins/super-forms/uploads/php/files/b5hf6v3fbqi8vmno15spgvcv8v/78191312513.pdfIn PDF document text
    • http://vinaktv.com/storage/ckfinder/files/nevimedadeliz.pdfIn PDF document text
    • https://southernwashpros.com/nbloom/fckuploads/file/68540142380.pdfIn PDF document text
    • http://cp-tournament.org/ckfinder/userfiles/files/guwisizedoze.pdfIn PDF document text
    • https://www.glasswindowequipment.com/wp-content/plugins/super-forms/uploads/php/files/6f5b926eeb313d035b25dff10fbe8feb/jexegatifamuroxuz.pdfIn PDF document text
    • https://g-ortho.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613ee1b8acf22---13792909615.pdfIn PDF document text
    • https://photographerin.agency/wp-content/plugins/super-forms/uploads/php/files/s3mpo5mgvdhdf4ae8d9rk0f5l6/rapowuredadevalukik.pdfIn PDF document text
    • https://noventa.cz/media/files/file/4917221259.pdfIn PDF document text
    • http://hoanhaochemical.com/uploads/files/wijewegivifagezedome.pdfIn PDF document text
    • http://med-os.com/user_upload/file/doguweme.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_off0000c3f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC3F7 10376 bytes
SHA-256: 6ea7edf62dde5037eb0c57256fb6d4dc3912943dea4ac663b5b54f6905f8179f
font_01_sfnt_off0000dba4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBA4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f3b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3B6 17340 bytes
SHA-256: fe2c7ab749aa2378a1dcadac600c3ec79787cf73dee3145b2bccdfef2a98d079

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