Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b54f62d1b12e9e0…

MALICIOUS

PDF

89.0 KB Created: 2021-04-12 02:26:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: e39c2750d857181d1b48ae31dc7b4b7c SHA-1: d81d2aa703e67eeb586e9ec66868ef33d8d796d8 SHA-256: 4b54f62d1b12e9e0189d591c2f4d03f903c327f29cc7c693d764229db110980a
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URI pointing to a suspicious domain, likely intended to trick the user into clicking it. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing or trojan. While no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to redirect the user to a malicious site, potentially for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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://bologen.ru/strik?utm_term=what+is+youth+culture+today PDF link annotation
    • http://idealica-italy.site/market_leader_practice_file_intermediate_answer_keyp0a0g.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481990/normal_5fd116bc12c68.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444623/normal_5fe2452a1782c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369786/normal_5fdb3afbef332.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4394061/normal_5ffa2fffb9be2.pdfIn PDF document text
    • http://menformula.xyz/zitur3yj3v.pdfIn PDF document text
    • http://tuwukadinem.mygamesonline.org/20708995851.pdfIn PDF document text
    • http://rijexofugovu.medianewsonline.com/burdens_are_lifted_at_calvary_sheet_music_free.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4497666/normal_5ff4eae3a1b91.pdfIn PDF document text
    • http://vomidujoma.scienceontheweb.net/zomig.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449771/normal_6022dff57cd4a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497075/normal_606a08cea0b45.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446395/normal_5fcd0c812b860.pdfIn PDF document text
    • http://iuts.space/pebewigujasanavizerdhaih.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/radubozufiwo/free_flyer_templates_for_education.pdfIn PDF document text
    • http://rofuvawitarul.atwebpages.com/18445307184.pdfIn PDF document text
    • https://s3.amazonaws.com/jubiferekaka/qiagen_pcr_purification_kit_protocol.pdfIn PDF document text
    • http://nudoritane.atwebpages.com/html_to_api_php.pdfIn PDF document text
    • https://s3.amazonaws.com/posufij/delta_shopmaster_sliding_miter_saw_manual.pdfIn PDF document text
    • https://562a32fb-e9c8-4d8f-ac7e-a760da58c396.filesusr.com/ugd/68ec97_b0589df152f94c298f6c924019f5a781.pdf?index=trueIn PDF document text
    • https://57933e30-1e86-4cbe-ad2b-777cb72f9932.filesusr.com/ugd/235f1a_b8985a655f7748929b7cfc3104f22d49.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bipepezuwed/16776934757.pdfIn PDF document text
    • https://s3.amazonaws.com/lusabifef/58402861283.pdfIn PDF document text
    • https://f1cb2ec4-a82d-4768-8a06-5236a2db220e.filesusr.com/ugd/a2e20a_c4d40e09549d4935af4bb566efe6227b.pdf?index=trueIn 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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fb55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB55 3396 bytes
SHA-256: 1e932d4e6b16f67941fd0f8c57fb5d698f70f410c8a330883e5ba69d79234196
font_01_sfnt_off0001077c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1077C 5144 bytes
SHA-256: 2e02189561b4d686830b25cd0e474dc5d0f3b5a543ea9f6be512d8fece674467
font_02_sfnt_off00011905.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11905 11084 bytes
SHA-256: 105b4c0022c16e3f2253206e52182ff5e06a43a5f7d94c3106a971446bd134f6
font_03_sfnt_off00013f31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F31 16060 bytes
SHA-256: 503f5200e83b189a546b6c6e1d808633a9135186956fe76ff9bd78de3d91e3c6

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