Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7df3c837b192367…

MALICIOUS

PDF

72.7 KB Created: 2020-12-15 18:59:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 508e838123394ad38c6c57e013000914 SHA-1: 92326ccc4c83e912ba643361bb117e46b1b602c7 SHA-256: e7df3c837b19236725cb4d68d158ced27d2305f18e15ac3ec9dc5b7d7c7f81c9
94 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 3

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://ggtraff.ru/strik?utm_term=armas+de+la+segunda+guerra+mundial+dibujos In PDF document text
    • https://cdn-cms.f-static.net/uploads/4404310/normal_5faae8fe50b0e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4506159/normal_5fb404debd082.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387826/normal_5fbdc7a47390a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370056/normal_5f8881e7529f2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368750/normal_5fc47a983b447.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/1f315abe-e46f-40c8-829f-f46adc1b8956/kisegodono.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc583aebf71053ccb2ee7e6/t/5fcdbcb5a87f9f1b19f8a450/1607318710902/sing_karaoke_offline_recorder_apk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a16a685a-9740-46c0-86ef-ed473f616e80/roger_bartra_anatomia_del_mexicano.pdfIn PDF document text
    • https://s3.amazonaws.com/zabevog/interview_questions_and_answers_file.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5831c154-00d9-4bcb-bbb5-9d5c9a66f7d3/mua_giy_siu_m_gi__u.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bd7eb36d-e02b-4d31-b909-91793469dba1/ford_420_tractor_service_manual.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5db78a5bc066edfc78c8f/t/5fd13dace3865c7b6b7c01cd/1607548341558/5219558737.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dca8f56e-e0b4-4c8a-9181-cc9fe18655e2/safofomakubiligix.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/42cf3017-e852-4671-8242-7085cd414816/batokex.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_off0000df74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF74 5348 bytes
SHA-256: 1aedb7ea61dfced73b5356f8fb3136586427ace7e6cd64c82bcea90e04458748
font_01_sfnt_off0000f18a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF18A 11280 bytes
SHA-256: 5071cf4ba407c07f71da1b33e32bf3b2a442d976727196ffedd66a74fa85723f

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