Malicious PDF — malware analysis report

Static analysis result for SHA-256 485c800a41c32c38…

MALICIOUS

PDF

79.5 KB Created: 2021-06-29 11:19:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: b5b22a9f6d628f2a192d32af8e2c43ed SHA-1: f44bb72332c64fe4447c57b44e8bcca64bfafd6e SHA-256: 485c800a41c32c388c4905d3b711bc169fb4b60ddbb4cecd21153f6406c435e4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of external links, many pointing to compromised CMS upload directories or disposable hosting, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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://drafthe.ru/uplcv?utm_term=narnia+3+full+movie+in+tamil+watch+online PDF link annotation
    • https://airshow-bg.com/file/70063348305.pdfIn PDF document text
    • https://pasarantogeldua.com/contents//files/12944170317.pdfIn PDF document text
    • https://www.grecosalesinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/160760c40b29dc---29304906884.pdfIn PDF document text
    • http://akkoryazilim.com/userfiles/file/fubexatojeniw.pdfIn PDF document text
    • http://prodesign31.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160b817d453b8a---37585866327.pdfIn PDF document text
    • http://harasim.cz/uploaded/files/pexew.pdfIn PDF document text
    • https://notofthisgalaxy.com/wp-content/plugins/super-forms/uploads/php/files/h4r75bfgha49cm7rj3p8648oli/tipekiduzigadas.pdfIn PDF document text
    • https://e-lightingcontrols.com/wp-content/plugins/super-forms/uploads/php/files/d590d3d8e240142840218527d717fa33/digil.pdfIn PDF document text
    • http://payassistinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b420ade20a---varepesaxutevugabodanon.pdfIn PDF document text
    • http://ajarnveerapong.com/UserFiles/file/nuxidowepu.pdfIn PDF document text
    • https://kaxtongroup.com/home5/maxconne/public_html/kaxtongroup/assets/images/newspostimages/files/sasolafarala.pdfIn PDF document text
    • http://bennyhigh73.com/clients/3/33/33ce00c6a031cf3b17a3dcf69aaa7594/File/zipotezuvufijexiruzuji.pdfIn PDF document text
    • https://abofahed.com/userfiles/file/16309149913.pdfIn PDF document text
    • https://laneopx.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a591dd83141---79715121897.pdfIn PDF document text
    • http://emeraldoutback.com/clients/f/f6/f61299a274fa8fdb0c00f5b1ed511d42/File/35833338420.pdfIn PDF document text
    • https://www.pharmaright.ca/wp-content/plugins/super-forms/uploads/php/files/r9remem2qup0mhhrp3cnu5sc92/padufitupato.pdfIn PDF document text
    • https://pensiuneavalentina.ro/app/webroot/file/digofejupezijorejomodisa.pdfIn PDF document text
    • https://vildmarksjagt.dk/userfiles/file/fukokov.pdfIn PDF document text
    • http://brighterhealthcare.co.uk/wp-content/plugins/super-forms/uploads/php/files/cl15dkonukputg5jgvd0m7r4db/kawetufulibevil.pdfIn PDF document text
    • https://sunwayhk.com/louis/STARKGROUP/ckfinder/userfiles/files/77620708328.pdfIn PDF document text
    • https://erinmillssmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/8aue2frronrkqof9veafi56vk1/17193468447.pdfIn PDF document text
    • https://cuisinescartier.ca/upload/editor/file/29383848604.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_off0000d398.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD398 16896 bytes
SHA-256: 8b24890c731474cd48e02094c872ab48a0dde72516f0dfbed851d8062e7ea6a6
font_01_sfnt_off0000ffaf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFAF 10832 bytes
SHA-256: b95a79256f702bc9bb916dd2ac3e47c7870b3bc702a3decb80c7305c708349e1
font_02_sfnt_off00011891.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11891 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1