Malicious PDF — malware analysis report

Static analysis result for SHA-256 6940db0e4bd62287…

MALICIOUS

PDF

74.7 KB Created: 2021-03-02 14:02:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: c6e6c3adf6906ba9290e35822d8a5d7b SHA-1: 300c4f8e97deb8c958b28f433d5f17eeae99432b SHA-256: 6940db0e4bd62287ddb89b0de3266bc7b5205b2f7adbd84d8c8b7aca648be08c
116 Risk Score

Malware Insights

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

The PDF contains an embedded URL that mimics a search result, a common tactic for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the malformed stream length heuristic suggests an attempt to hide exploit code within the PDF structure, likely to redirect the user to the malicious URL.

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
  • Malformed active-content stream length medium PDF_MALFORMED_EXPLOIT_STREAM_LENGTH
    A PDF stream that carries active/exploit-looking content has a declared /Length that does not match the recovered stream body. Malformed stream boundaries and length mismatches are common parser-evasion/supporting evidence around Reader exploit streams.
  • 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://lozipotod.ru/strik?utm_term=how+do+you+remove+a+broan+allure+range+hood PDF link annotation
    • http://sacredname.ru/how_to_get_a_link_to_the_past_on_switch0lagb.pdfIn PDF document text
    • http://znakomstva18x.site/lokusatubebabunetuxonigektsb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380411/normal_5fc88e4ce331a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375894/normal_5fcba591a0dc5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384652/normal_600e5cb5e8822.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404133/normal_5ffc3970c2b13.pdfIn PDF document text
    • http://znasila.ru/72736401042iu2lf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369143/normal_6002769aa2e05.pdfIn PDF document text
    • http://cenderaoriginator.com/how_to_check_sap_exchange_ratejx3c3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365546/normal_6018c31eb972f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4492580/normal_60029189b8dc8.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/lunojol/gopunerevuzuze.pdfIn PDF document text
    • http://wavudipikudela.epizy.com/jag_begana_movie.pdfIn PDF document text
    • http://pomigipasa.epizy.com/is_chicken_shack_open_today.pdfIn PDF document text
    • http://nosavanadir.rf.gd/71177677873.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_off0000e615.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE615 5416 bytes
SHA-256: 57e5bc85ca1fb8b654ca29742c493089b86ffb81aec48aa5b42e235850e5a8ee
font_01_sfnt_off0000f86c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF86C 10872 bytes
SHA-256: 05a5fb5dde9b34f8c89398ea0e2a0ddb53c3a684819e5cac08d85a3599a49491

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