Malicious PDF — malware analysis report

Static analysis result for SHA-256 9132b2e68343f839…

MALICIOUS

PDF

73.9 KB Created: 2021-02-19 02:44:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: c828822d6842eb4b606eeb1314395129 SHA-1: 2300b0e84b971a1ada2906738cde1a7e3e18202e SHA-256: 9132b2e68343f8390dcc322481efef00cfff9d9795960d240eb4ed7b5671ea63
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to Weebly-hosted PDFs, suggesting a link farm or redirection mechanism. ClamAV and ML classifiers identify this as a phishing or malicious PDF. The presence of embedded URLs and the heuristic 'PDF_SEO_LINK_FARM' indicate the document's primary purpose is to drive traffic to external sites, likely for malicious purposes such as malware distribution or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://jottigo.ru/strik?utm_term=itil+intermediate+service+operation+study+material+pdf PDF link annotation
    • https://ribupawotomimam.weebly.com/uploads/1/3/4/6/134694318/butovipazoweviketuja.pdfIn PDF document text
    • http://pusokum.66ghz.com/disable_browser_notifications_android.pdfIn PDF document text
    • https://bogekivusuwi.weebly.com/uploads/1/3/4/6/134604255/maredujetavu.pdfIn PDF document text
    • https://bojibelatos.weebly.com/uploads/1/3/4/0/134040608/ragije-fekezarazo.pdfIn PDF document text
    • https://wisukemebo.weebly.com/uploads/1/3/5/9/135962546/tibizezozorowoxufu.pdfIn PDF document text
    • https://cdn.sqhk.co/zovitamojim/aighhje/vipuxeferadawagesoje.pdfIn PDF document text
    • https://cdn.sqhk.co/kafekata/SQTXDFl/43871915441.pdfIn PDF document text
    • https://cdn.sqhk.co/joxipadij/HhjOLgj/kajeka.pdfIn PDF document text
    • http://zigitodaxepugi.22web.org/bobopepib.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xesiduzivodugi.epizy.com/gidizowapokigatagatija.pdfIn PDF document text
    • http://fazufunove.rf.gd/fatidaxodexudones.pdfIn PDF document text
    • http://kagimotazife.epizy.com/self_employed_invoice_template_uk.pdfIn PDF document text
    • https://s3.amazonaws.com/wujanozo/ladupe.pdfIn PDF document text
    • https://s3.amazonaws.com/popisiburewixuj/atm_complaint_form_sbi.pdfIn PDF document text
    • https://s3.amazonaws.com/zalomi/lexepirorugusazidatapi.pdfIn PDF document text
    • https://s3.amazonaws.com/xozeb/98174915123.pdfIn PDF document text
    • http://mafofeguf.epizy.com/chernobyl_series_dublado_utorrent.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_off0000e207.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE207 5400 bytes
SHA-256: 47499d5cde6edb4cd23c63691db0406bb913a164ae29251f5f29c3fc9505b34a
font_01_sfnt_off0000f45a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF45A 11184 bytes
SHA-256: f772f240710ac9310d873d1691e24fa9221e52049b0a37c59206d99a8da7e44d

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