Malicious PDF — malware analysis report

Static analysis result for SHA-256 5751210e81d1e879…

MALICIOUS

PDF

76.3 KB Created: 2021-06-12 15:15:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 42eea51872b4f0ca5999774d0996bd5a SHA-1: 583b9c0e6f3f739dde96f552027dc912a7062212 SHA-256: 5751210e81d1e8792766647736eb1a97ab78f3bd04cb55e2bd000a762bdaa3be
196 Risk Score

Malware Insights

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

The PDF contains numerous embedded links pointing to potentially malicious domains, indicating a phishing or malware distribution attempt. Heuristics like 'PDF_RANDOM_URL_LINK' and 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly suggest malicious intent. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://pistant.ru/uplcv?utm_term=kabhi+kabhie+1976+watch+online PDF link annotation
    • https://studio45.live/wp-content/plugins/super-forms/uploads/php/files/hpp116arq17gvion1m50tata12/6619234233.pdfIn PDF document text
    • https://www.dentaltaxpros.com/wp-content/plugins/super-forms/uploads/php/files/fd9c3fe58c609115b86812dec016b670/diwudakitesizikop.pdfIn PDF document text
    • https://homini.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160730cc647c94---nidafadudusubi.pdfIn PDF document text
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/82af87221ef8fc727f5dd75a39bab74a/nopewatiguwefiko.pdfIn PDF document text
    • http://www.sunarnuricomuisvealisverismerkezi.com/wp-content/plugins/super-forms/uploads/php/files/cp6dbvjb3ssgnpd1s794m86c00/jikex.pdfIn PDF document text
    • http://www.viksexteriors.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0c84ec299f---88641372587.pdfIn PDF document text
    • http://aite-materials.com/upfiles/file/46037404269.pdfIn PDF document text
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/10e58942f65e6919b75b47bad9bd18a8/jufobavo.pdfIn PDF document text
    • http://perfectthesale.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608647f7387d2---pevuduladutapumowelivito.pdfIn PDF document text
    • http://www.farparts.cl/wp-content/plugins/formcraft/file-upload/server/content/files/160730bf21d208---naduridefu.pdfIn PDF document text
    • https://www.elitelawnsolutions.co.uk/wp-content/plugins/super-forms/uploads/php/files/9i8b02ovcv94k9km36gok9tu5a/nuwokefodiluzeka.pdfIn PDF document text
    • https://mut-zur-veraenderung-hambuch.de/userfiles/file/xiwiwapexiwiv.pdfIn PDF document text
    • https://greyquotient.com/wp-content/plugins/super-forms/uploads/php/files/a9b98a293cde7436f1269322ad861713/wobonolozoposoretovorav.pdfIn PDF document text
    • https://batikatravels.com/userfiles/file/13582668433.pdfIn PDF document text
    • https://infravoip.com/wp-content/plugins/super-forms/uploads/php/files/6534b1cf101430b43a20951a5f45d3f6/80065590327.pdfIn PDF document text
    • http://zwickerfoto.hu/_user/file/fumawujute.pdfIn PDF document text
    • https://designcoordinators.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077849027d83---79113488158.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_off0000ea6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA6E 5320 bytes
SHA-256: 86a4b858acc1a7c1d50878d3a195f06cf288271ca96e2df73fe6a40dfe8ed70a
font_01_sfnt_off0000fca4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCA4 11148 bytes
SHA-256: bc77d483c68acc327ddd496c3b29a43816e879d5864188044871b4822b3400ef

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