Malicious PDF — malware analysis report

Static analysis result for SHA-256 e00b5288a7d24d87…

MALICIOUS

PDF

74.8 KB Created: 2021-09-21 08:15:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 5b404f9634f2fa46e9279052b6127e40 SHA-1: 180e98d514a0067d7e81e2fe5b51c596af67d7b7 SHA-256: e00b5288a7d24d87df2e4afffc89753caf1d17281d49cf00714d3605f0d73d1a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to various websites, many of which appear to be compromised or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests the document is designed to manipulate search engine results or act as a deceptive landing page.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9939

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://cructi.ru/uplcv?utm_term=redmi+9c+global+rom PDF link annotation
    • http://secureyun.cn/uploadfile/file///2021091916223871.pdfIn PDF document text
    • https://gpagroup.in/wp-content/plugins/formcraft/file-upload/server/content/files/16145838601807---tojodivurofodexo.pdfIn PDF document text
    • https://formapolis.it/wp-content/plugins/super-forms/uploads/php/files/c8ece80ad1ec63ae69624b30da2a9809/15551778413.pdfIn PDF document text
    • http://soles2walk.cz/data/file/49828696003.pdfIn PDF document text
    • https://www.utn.ac.cr/sites/default/files/files/99245800255.pdfIn PDF document text
    • http://prestinoequitacion.com/imagenes/upload/files/28068883685.pdfIn PDF document text
    • https://ptogel1.com/contents/files/30581839506.pdfIn PDF document text
    • http://osullivanspressurewashing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613d968f1dd55---98633519266.pdfIn PDF document text
    • http://ekhoron21.mn/uploads/files/21405814234.pdfIn PDF document text
    • https://mamap.in/ci/userfiles/files/98016897286.pdfIn PDF document text
    • http://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/16136187e8b031---97516026300.pdfIn PDF document text
    • http://asckhn.com/acskhn/userfiles/file/roduvifa.pdfIn PDF document text
    • https://narellesastro.com/userfiles/files/jemon.pdfIn PDF document text
    • http://andreuma.madteam.net/ckfinder/userfiles/files/gejibimubojirikub.pdfIn PDF document text
    • https://fallahi-sch.com/userfiles/file/xijerilinisenak.pdfIn PDF document text
    • http://xn--12cfu9bc1efac9a9azfdsb7b9d1f0j.net/ckfinder/userfiles/files/tezulaludeduso.pdfIn PDF document text
    • http://zh-huaxun.com/uploadfiles/files/45328878286.pdfIn PDF document text
    • https://www.frontierexim.com/wp-content/plugins/super-forms/uploads/php/files/dbvln9rg78hkscebf86ls5m9ba/tijazijasipozemewodal.pdfIn PDF document text
    • https://mehfermobilsaglik.com/userfiles/file/21382270195.pdfIn PDF document text
    • https://www.saenger-ohg.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613991e233531---gadudapafiz.pdfIn PDF document text
    • https://www.gml.de/wp-content/plugins/formcraft/file-upload/server/content/files/161436360591af---50259004716.pdfIn PDF document text
    • https://hkparkkonutlari.com/image/files/582739114.pdfIn PDF document text
    • http://www.alcera.ca/userfiles/file/pamunilimazulo.pdfIn PDF document text
    • http://www.eflox.net/wp-content/plugins/formcraft/file-upload/server/content/files/16133c0e01447d---wosupebipuriwuferebanemo.pdfIn PDF document text
    • http://mylivediamondinventory.com/uploads/files/85761817155.pdfIn PDF document text
    • http://cl-pub.com/files/files/gajejofololobusisupovu.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_off0000ba72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA72 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d284.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD284 20540 bytes
SHA-256: eb28a24c435a0111176a45c31af61973d6862593ea35eb2fb7a853b4428e157c
font_02_sfnt_off000104f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104F4 10696 bytes
SHA-256: 2005e75035f23d1aedc61305a00ac785143cf71d4aecd5f04dc65c1da1890761

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