Malicious PDF — malware analysis report

Static analysis result for SHA-256 020ee0b965ce5408…

MALICIOUS

PDF

82.9 KB Created: 2021-09-17 20:31:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 58917b4b3e8a82915353c091841245f0 SHA-1: 1121f2ea673736994fedd10b16302da2c6808ebd SHA-256: 020ee0b965ce5408436d363595ed0018ab52106f79d65096aa1410b821243250
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm with numerous URLs pointing to various websites, many of which are hosted on compromised CMS platforms or disposable domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The presence of multiple external URIs and link farm heuristics supports this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://horacebatten.com/ckfinder/userfiles/files/22259335813.pdf In PDF document text
    • https://marwaautorepair.com/nbloom/fckuploads/file/36765502707.pdfIn PDF document text
    • http://vipavtoufa.ru/wp-content/plugins/super-forms/uploads/php/files/0ad6eff5f961d7886b1f7b99f6ad756d/pugiwoxolarumapanejel.pdfIn PDF document text
    • http://theurbanbazzaar.com/userfiles/file/61977756628.pdfIn PDF document text
    • http://phantasos.org/userfiles/file/36864765429.pdfIn PDF document text
    • http://murielbellhomes.com/userfiles/files/4752016118.pdfIn PDF document text
    • http://htwy.com/upload/file/pozefofonotaxukixezugezav.pdfIn PDF document text
    • http://afslab.asia/upload/files/puziwu.pdfIn PDF document text
    • https://christianklein.eu/Quansis/ckfinder/userfiles/files/wuwuzoke.pdfIn PDF document text
    • http://exoticland.bg/upload/files/files/48712312466.pdfIn PDF document text
    • http://rialta.ie/userfiles/files/11847968936.pdfIn PDF document text
    • https://yastudio.net/wp-content/plugins/super-forms/uploads/php/files/e70b1b71978b1155cdd984f222fd7621/83133180379.pdfIn PDF document text
    • http://lovesenergy.com/file/67218888279.pdfIn PDF document text
    • https://macintosh-szerviz-javitas.nuttydog.hu/ckfinder/userfiles/files/fuzijoworake.pdfIn PDF document text
    • http://kondicionery-elektrostal.ru/upload_picture/file/pimajagamojutusegumex.pdfIn PDF document text
    • http://vakaruinzinerija.lt/userfiles/file/tikal.pdfIn PDF document text
    • https://peoplesmodelinternational.com/ckfinder/userfiles/files/2145578560.pdfIn PDF document text
    • http://exosushi.com/uploads/files/57235015046.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132da717dd42---rozetemekegapo.pdfIn PDF document text
    • https://ural-aiti.ru/admin/ckfinder/userfiles/files/68843784545.pdfIn PDF document text
    • https://spherule.org/wp-content/plugins/super-forms/uploads/php/files/ihi74kocpb7ptk3ne4his70ae2/31070542321.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=gallery+vault+photo+recoveryPDF link annotation
    • 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_off0000dd76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD76 18652 bytes
SHA-256: fb67bceb37197e8da089bdf9466338995a80015e95217cdca29e272d7776d056
font_01_sfnt_off00010dfe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DFE 10424 bytes
SHA-256: 77ee7c63a3f431be04ad144dd0750b9600f4ceba08779948f18a39162748bd3b
font_02_sfnt_off000125db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125DB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1