Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2ae41dc5d9bc146…

MALICIOUS

PDF

65.7 KB Created: 2021-03-11 14:57:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-13
MD5: 9f2a18f3ca46c6f7471f4d7bc47885c3 SHA-1: 5c40118ee4254f66049820088a2611c039a8ce43 SHA-256: c2ae41dc5d9bc1461be7c9d60bdf8a0e69e82f0f1a3e0806561e5d89b133d12a
96 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, likely intended to host phishing content or malware. ClamAV detection and ML classification strongly indicate malicious intent, classifying it as a phishing trojan. The document body, though heavily obfuscated, appears to be a lure related to educational materials, suggesting a spearphishing attachment attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://mezovuduw.ru/wix?keyword=reinforcement+activity+1+part+b+p+228+answers PDF link annotation
    • http://artdebug.site/demand_choke_price_calculator1sc9j.pdfIn PDF document text
    • http://gaydating.world/how_climate_change_affects_plants_and_animalsp6vy0.pdfIn PDF document text
    • http://microbladingeyebrowsdallastx.com/bujavikedagyoz2p.pdfIn PDF document text
    • http://zelolugo.22web.org/lego_harry_potter_ps4_guide.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413125/normal_5fd0d97b01732.pdfIn PDF document text
    • http://sexesex.site/graco_stroller_reg_no_pa-24833favpz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485450/normal_602acf9635427.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://538d8494-0c7d-401a-b890-0485f6bc7bca.filesusr.com/ugd/29c71c_14d6b16f76be44e987cbd6f76191fdf2.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wikurixobelu/cpcs_blue_card_renewal_form.pdfIn PDF document text
    • https://17673d3b-e5d0-4e0e-8211-f079fadf35f5.filesusr.com/ugd/13ae68_2378ed98f42e4acdab27df4cfdb3a981.pdf?index=trueIn PDF document text
    • https://748f1d53-d141-46c1-926a-d14fc69713a3.filesusr.com/ugd/e3ed1f_7a1b905c54b44beaa802462ac8b095e9.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/furunumaroxun/html5_responsive_web_template_free.pdfIn PDF document text
    • http://tedijafubivot.epizy.com/raj_bstc_admit_card_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/rogugagatuf/11199184284.pdfIn PDF document text
    • https://s3.amazonaws.com/nilititonawafim/aberdeen_performing_arts_discount_code.pdfIn PDF document text
    • https://044e8d80-c429-4a1f-820d-9b443c65b389.filesusr.com/ugd/53c654_3cbf38c7853740329eb59e6b410fbac8.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vitelitubovuluj/21_cfr_guidelines_for_medical_devices.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_off0000c276.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC276 5908 bytes
SHA-256: 8bd8e6200faca01a3555d4ba5f1842b7e7b85ca1e2ef1b2eb213baa3c2679217
font_01_sfnt_off0000d6a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6A1 10312 bytes
SHA-256: 1360e08ce58069cc9fea7fcc1f0f98ec6bb86ff2ca4d84788c829c6d29a9c8d7

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