Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a5cdfc7fa260c9a…

MALICIOUS

PDF

83.9 KB Created: 2021-05-20 08:16:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 70ee35053da93d65c87b7c648a8da436 SHA-1: a64acb0fb52547741b7baa7f425f72a28ca94e3f SHA-256: 4a5cdfc7fa260c9a2d43491fab05bdbcf4b3f6db630a050fa7599fd991f09d24
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that directs users to a suspicious domain, likely for phishing or malware distribution. ClamAV and ML classifiers strongly indicate malicious intent, classifying it as a phishing trojan. The document body, though heavily obfuscated, appears to be a lure related to a 'Stanford football playbook'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://pelibifir.ru/strik?utm_term=stanford+football+playbook+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4475725/normal_6065fd43508bd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490121/normal_5ff545a69640c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4390071/normal_5fdeea9f083f5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418197/normal_605fe3bd9cbb9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469145/normal_602a8224b39ef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378170/normal_60393b4727143.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4497685/normal_5fe09a9333a28.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452863/normal_6054d45d48f6b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405674/normal_604ce1b929d90.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/e43f060b-3fc4-4b0b-8f53-07bad938c958/miniature_dachshund_blue_eyes_for_sale.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6926c093-f5ba-476f-8fb0-2eec1ef41d77/vobuzosafixeluf.pdfIn PDF document text
    • https://s3.amazonaws.com/jadudusujuje/stephen_king_movies_list_imdb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/05f9b999-a55b-4501-b2af-ef7e645efe73/xenusemevalikuwuxijaru.pdfIn PDF document text
    • https://s3.amazonaws.com/xufujofaleki/software_development_technical_analysis_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/213532e8-e2ee-4be1-8af1-99a55df3dab1/pengajaran_surah_al_mulk_ayat_1-15.pdfIn PDF document text
    • https://s3.amazonaws.com/sogovekevi/43670498959.pdfIn PDF document text
    • https://s3.amazonaws.com/mikibetiv/44695938390.pdfIn PDF document text
    • https://s3.amazonaws.com/kesumasaka/16514266140.pdfIn PDF document text
    • https://s3.amazonaws.com/pilazi/belabet.pdfIn PDF document text
    • https://s3.amazonaws.com/tamobalasu/aplikasi_baca_manga_anime_bahasa_indonesia.pdfIn PDF document text
    • https://s3.amazonaws.com/benuka/domiwudawitabegu.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_off00010829.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10829 5264 bytes
SHA-256: 2e7cd8199f37c453c2e7a73f436a10a105c591a4eececf7f0ad6953e1c92e9e7
font_01_sfnt_off00011a29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A29 11240 bytes
SHA-256: 7042b3e16feaf7addde768c58f56588f3d0b9b8b735d5943dc6ec4333f3a5e7a

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