Malicious PDF — malware analysis report

Static analysis result for SHA-256 9aa55b7b1dff61b0…

MALICIOUS

PDF

82.6 KB Created: 2021-02-15 00:59:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: fa6c8ec93a40a763289afd7c8dcb7e64 SHA-1: cebe4b62440798f63801c6ffc4feff053beb3596 SHA-256: 9aa55b7b1dff61b00cafe9098fa9baf7c180159738de55eddf4d2b461f980137
96 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://leonvi.ru/aws?utm_term=brandon+sanderson+warbreaker+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4405459/normal_5fc9da6b4a7f4.pdfIn PDF document text
    • http://zalavsky.ru/47740124856ceauf.pdfIn PDF document text
    • http://tesar-krd.ru/platform_meaning_of_marathi_language7ld8a.pdfIn PDF document text
    • http://cpskras.website/xoxomusotenubv9nw7.pdfIn PDF document text
    • https://cdn.sqhk.co/papusabefo/ghboDgg/citizens_fcu_mobile_banking.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465924/normal_5fcd994faa173.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4493545/normal_5fdc64ae595b9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4474206/normal_5fee1182aac6e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392441/normal_5fcdb949d678d.pdfIn PDF document text
    • http://noverst.xyz/behavioural_sciences_mcqs_with_answers551u0.pdfIn PDF document text
    • https://cdn.sqhk.co/kuvapipitol/jjLYXje/57940385582.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416331/normal_600103c1c6b9a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490133/normal_5fe87eb5c202d.pdfIn PDF document text
    • https://cdn.sqhk.co/fitamorigob/jfhajec/20422316490.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sadusijof.rf.gd/ruzajoxiwidobok.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_off00010697.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10697 5348 bytes
SHA-256: bb0ffb1b2ee823cb964b16759336632784efa3dc83e881f16f637442f69d9ef1
font_01_sfnt_off000118e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118E6 10664 bytes
SHA-256: e83b401fe66a79606d420c2c2db59623678a810120b69a9172339b9a09ac74da