Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ed53d05c82b18dc…

MALICIOUS

PDF

76.7 KB Created: 2021-02-26 21:39:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 961066db246081cad4b4df924098bed1 SHA-1: 2b69f21f7efa5024a81c1f9e5db6a4ce76b8e906 SHA-256: 0ed53d05c82b18dc2f9749850d8d53806b12e88c83e9ed25640d835202bfcf6d
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, including a link farm detected by heuristics, suggesting an attempt to redirect users to malicious sites. The presence of a ClamAV detection for 'Pdf.Phishing.Trojan' and ML classification further supports malicious intent. While no scripts were directly extracted, the PDF structure and embedded URLs indicate a phishing or malware distribution attempt, likely initiated via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://jacksth.ru/strik?utm_term=metal+gear+solid+v+the+phantom+pain+mods+xbox+360 PDF link annotation
    • http://vitofemegawe.getenjoyment.net/6080223072.pdfIn PDF document text
    • https://lemefiware.weebly.com/uploads/1/3/4/0/134017231/4863016.pdfIn PDF document text
    • https://pusotovoxidelo.weebly.com/uploads/1/3/1/6/131637553/e22b403.pdfIn PDF document text
    • http://baugroup.info/officesuite_8_activation_code_for_androidssbhq.pdfIn PDF document text
    • http://matcobzor.ru/vajepugisokidugajurul0ctul.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/sojaxub/acer_aspire_one_756_service_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/mexijegedakol/bozewovexebumetotufag.pdfIn PDF document text
    • https://s3.amazonaws.com/wibadinavosunom/gurunoketu.pdfIn PDF document text
    • https://s3.amazonaws.com/fotojipifuzitul/baby_boy_names_app.pdfIn PDF document text
    • https://s3.amazonaws.com/feseni/27697119493.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_off0000ec5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC5B 6104 bytes
SHA-256: 8c5a789fa169174f347265ef20090dc8e5cb76bf1c5078fd344f07fa6c31778d
font_01_sfnt_off00010103.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10103 10900 bytes
SHA-256: 1fe95263c7322b08b51e91c76511ae9d4c66cee6c1d4d7746429c66067d19b66

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