Malicious PDF — malware analysis report

Static analysis result for SHA-256 57c67a50f1ace311…

MALICIOUS

PDF

79.7 KB Created: 2021-05-16 20:03:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 50d7db3f6a8b0767991533137bd5cb05 SHA-1: 295197c8881560b37dd49710c31192d71c879bfa SHA-256: 57c67a50f1ace31162543184534bff025585593e3d14e8a01a897fa128b42fbd
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that redirects to a malicious domain, likely for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, appears to be a lure related to child growth statistics, aiming to trick users into clicking the malicious link.

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://jottigo.ru/strik?utm_term=cuanto+mide+un+ni%25C3%25B1o+de+1+a%25C3%25B1o+7+meses PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4408584/normal_60382ee32507c.pdfIn PDF document text
    • http://limecash.xyz/foldable_leaflet_template_publisher0i7yn.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487663/normal_6033ee14d0469.pdfIn PDF document text
    • http://ellmax-site.xyz/prominent_d1c_chlorine_analyzer_manualj5lmz.pdfIn PDF document text
    • https://cdn.sqhk.co/kugefiruxat/ChjUqjj/vemode.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408989/normal_601cf86579910.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388046/normal_601d064e51ae1.pdfIn PDF document text
    • http://toolsbestpricemicrometer.site/hbr_guide_to_getting_the_right_workyip6u.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476924/normal_601bcffc73e33.pdfIn PDF document text
    • https://cdn.sqhk.co/liripudeb/iiiyigB/78835358203.pdfIn PDF document text
    • http://ukranews.site/dry_cleaning_symbols_guide4yopi.pdfIn PDF document text
    • https://cdn.sqhk.co/fekebazi/giibiag/samurai_aces_tengai_episode_1_mod.pdfIn PDF document text
    • https://cdn.sqhk.co/mogizufofuj/glhdieY/7116846704.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370528/normal_606a6b353ffee.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/34e24983-c48f-4794-a162-b022bde9e9cb/wejakatolobovibonifaza.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c5c8ba28-eebf-4888-b816-759b05ef649d/67087999090.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d29c010a-9035-4b72-928b-ba7ff2da1ac6/kewifodomiderof.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3102cad3-b8b1-4189-8d55-6e316fb7e8a3/5533586949.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e5602244-c08a-4765-b23b-251f24a0c6d6/sawepolun.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_off0000f808.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF808 5092 bytes
SHA-256: 061445ab0f529ab9f70cbc904f70deae1232fdc15ab991e4da40b50a33cbd303
font_01_sfnt_off0001090f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1090F 11920 bytes
SHA-256: 367d9b62a524af48bb93929f252377f19b896d7c52ecc181fb7dc20df2f55b29

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