Malicious PDF — malware analysis report

Static analysis result for SHA-256 4972ff50c5b06294…

MALICIOUS

PDF

68.9 KB Created: 2021-02-23 07:56:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: ba41690e63c832c7f083f04feb4b2bcc SHA-1: 092223391909904e9ce2c6d7e87767be9df1f95f SHA-256: 4972ff50c5b06294753a5aef0515dae968c916eceaeb5d62e57917ba392f7d40
126 Risk Score

Malware Insights

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

The PDF file contains multiple heuristics indicating malicious intent, including a high ML score and ClamAV detection as a phishing trojan. It embeds a URL that leads to a link farm on disposable hosting, suggesting a phishing or malware distribution scheme. The document body, though heavily obfuscated, contains references to 'wkhtmltopdf' and 'Qt', indicating it was likely generated by a tool rather than being a legitimate document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://maypoin.ru/strik?utm_term=palabras+de+enlace+en+un+mapa+conceptual PDF link annotation
    • http://menavuselixeba.iblogger.org/61514634132.pdfIn PDF document text
    • http://kefoweloruzopos.22web.org/vufiwikutorukuze.pdfIn PDF document text
    • http://arendagg.xyz/rerobefebawamon8lo2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/xokebore/barangay_tax_ordinance.pdfIn PDF document text
    • http://kivekedifewu.rf.gd/4204703742.pdfIn PDF document text
    • http://vedidutumi.rf.gd/72553710920.pdfIn PDF document text
    • http://bajivuselome.epizy.com/tisuduberifilanibab.pdfIn PDF document text
    • http://bivadalov.epizy.com/brain_parts_worksheet_answers.pdfIn PDF document text
    • http://bimimikojawador.rf.gd/54518895851.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cdf5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDF5 5360 bytes
SHA-256: 5dcc1f3b5d414bfdace6a89352f3f5a90ffe95d1013a08a6cc64df7ef31be47c
font_01_sfnt_off0000e00c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE00C 11596 bytes
SHA-256: 2f11bb0293063d6bdfe25667bbec259f1ed93b54b2427893820f2e248825f978

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