Malicious PDF — malware analysis report

Static analysis result for SHA-256 fcbf5edd26e30bf4…

MALICIOUS

PDF

122.4 KB Created: 2021-02-10 21:53:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: c3e2baed9d851d06877640f9d87b08d3 SHA-1: cc0d263a10437f39ab5d6df4a29eeeba7a86acff SHA-256: fcbf5edd26e30bf4a69ba650c9555f27c59ce3566b49334fc4005433776ae493
96 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV. It contains an embedded URI pointing to a suspicious domain, suggesting a phishing or malware distribution attempt. The document body, though heavily obfuscated, appears to be a lure related to antibiotic information, likely intended to trick users into visiting the linked malicious site.

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://maypoin.ru/wb?keyword=que%20es%20un%20antibi%C3%B3tico%20pdf PDF link annotation
    • http://ig-objectionform.com/rotator_cuff_tendonitis_physical_therapy_protocola7aoj.pdfIn PDF document text
    • https://cdn.sqhk.co/vopunokapire/jbyjchb/dumizumuduwowinoraran.pdfIn PDF document text
    • https://cdn.sqhk.co/xotabuti/jdtVjar/5255770917.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393359/normal_5fdc5e01c7d17.pdfIn PDF document text
    • https://cdn.sqhk.co/wabajevebe/WgdpjeR/bendy_and_the_ink_machine_colouring_book.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413119/normal_60030cd202c0a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370744/normal_5fefe0171d3fb.pdfIn PDF document text
    • https://cdn.sqhk.co/ravuviwidi/ALzihhi/46254052869.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4406806/normal_5fde7799111c4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486356/normal_5fcc137d74b5f.pdfIn PDF document text
    • https://cdn.sqhk.co/tutabalero/T8gdJwg/europe_map_free.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452389/normal_5fc7995557039.pdfIn PDF document text
    • http://steblin.pro/integumentary_system_quiz_and_answersxp1k5.pdfIn PDF document text
    • https://cdn.sqhk.co/bebiwamulanu/irrjgh3/carmageddon_max_damage_ps4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449614/normal_6003ab5665c76.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/sowirutelevolur/basic_electronics_books_file.pdfIn PDF document text
    • https://s3.amazonaws.com/rolefosiju/bambusa_balcooa.pdfIn PDF document text
    • https://s3.amazonaws.com/mejobu/civ_iv_strategy_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/zamuriza/bulandi_full_movie_480p.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00018f21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18F21 5240 bytes
SHA-256: 3c96b2de2b028951a54f02c44c8c258d3f7089513b49013200d85fb95ecb8445
font_01_sfnt_off0001a0bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A0BC 13236 bytes
SHA-256: 8fcb7e28e1cfbb006672b6f28609c4c3f9b5e0796aba949b8ac5c3ce5e079c8f
font_02_sfnt_off0001cc1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1CC1F 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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