Malicious PDF — malware analysis report

Static analysis result for SHA-256 50eeb9d8b5acff77…

MALICIOUS

PDF

146.8 KB Created: 2021-06-24 08:07:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 009e594c0f9a607e152c1bc39b5e6863 SHA-1: bec83ab647f6e37a51e8b9c43ce2b202a492716b SHA-256: 50eeb9d8b5acff7782caec297db2342b73d96b01882a4f0bb8872ca348f5841e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file contains numerous external links, many pointing to compromised WordPress sites, suggesting it's part of a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. No scripts were extracted, but the embedded URLs are the primary indicators of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://laborke.ru/uplcv?utm_term=monster+hunter+world+armor+builds PDF link annotation
    • https://tocgia247.com/wp-content/plugins/super-forms/uploads/php/files/r5vjn51m82fq11bko4j1vrofs3/likuwekirirasuwebapixumaj.pdfIn PDF document text
    • https://prairieroseclothiers.com/FCKeditor/file/9573795419.pdfIn PDF document text
    • https://bonafideonline.com.ar/wp-content/plugins/super-forms/uploads/php/files/a77740acf12ffb4a52ea4722404080af/remenufezapidusodut.pdfIn PDF document text
    • http://www.stockholmswingallstars.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e296572d14---72337740670.pdfIn PDF document text
    • https://stijsr.com/userfiles/file/69608211618.pdfIn PDF document text
    • https://mimpishio2bet.com/contents//files/82528969266.pdfIn PDF document text
    • http://kibbkw.com/uploads/file/82220535391.pdfIn PDF document text
    • http://strahovka66.ru/userfiles/file/zemarolulukujovuwezitoz.pdfIn PDF document text
    • https://gauravkankariya.com/wp-content/plugins/super-forms/uploads/php/files/vpptehr2lqd2b4j9d2r8ah3jb5/80031731906.pdfIn PDF document text
    • https://www.hotwaterfactory.com.au/wp-content/plugins/super-forms/uploads/php/files/26c467233890b262cc5bbd82946c01db/46039592200.pdfIn PDF document text
    • http://www.hypnotiseur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c153b015d49---80511492980.pdfIn PDF document text
    • http://inspirationallabels.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608f8a3a9c483---5208399333.pdfIn PDF document text
    • http://www.movingintofreedom.com/wp-content/plugins/formcraft/file-upload/server/content/files/160acb9001f049---xikimuwededig.pdfIn PDF document text
    • http://suachuaspa.com/upload/images-content/files/55567549911.pdfIn PDF document text
    • https://opuntia.eu/wp-content/plugins/super-forms/uploads/php/files/5828180fd6bd210d6f684a56e8eedd72/zinubutevagekafegivuk.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000207bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x207BF 5300 bytes
SHA-256: 5b098c392f0e239632e3f67909786e0685345f8ede99972d9ff08900bcc537a7
font_01_sfnt_off000219af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x219AF 10524 bytes
SHA-256: 1ba2cbfc2c79759bf6c7d67a7dfd9a75e84653cd83daf61850565a389b439839

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