Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c27648c9dee5025…

MALICIOUS

PDF

73.2 KB Created: 2021-02-15 16:35:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 927ca5ff2fb77c34e0ecdfde4199175f SHA-1: 425a76558f1c41fdcdbd20d5095c3681afbd0a3c SHA-256: 0c27648c9dee5025a0b06f2716259735fd29848802397e9771ae973db5ea345f
96 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by a machine learning classifier and ClamAV, indicating a phishing or trojan payload. It contains an embedded URI pointing to a suspicious domain, likely intended to host a malicious payload or redirect the user to a phishing site. The document body, though heavily obfuscated, appears to contain text related to 'simple present question exercises', suggesting a lure to entice users to click the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://seumenha.ru/strik?utm_term=simple+present+question+exercises PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4416144/normal_6029a7265b4b6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417413/normal_601a3038b6750.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481053/normal_5fd5f2b79ce76.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378149/normal_600b72bfb975f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420775/normal_600dc63e95c4d.pdfIn PDF document text
    • http://nefotibabi.iblogger.org/28257716013.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458148/normal_601c6785476ee.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445564/normal_5fc8198edc3e9.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/woxojuxafopuv/jijuk.pdfIn PDF document text
    • https://s3.amazonaws.com/jalasilunaz/nudawimigenesim.pdfIn PDF document text
    • https://s3.amazonaws.com/satedafadusizo/mvvm_design_pattern_android_example_github.pdfIn PDF document text
    • https://s3.amazonaws.com/vovuzize/bookworm_adventures_full_version.pdfIn PDF document text
    • https://s3.amazonaws.com/xixonu/bahut_pyar_karte_hain_new_song.pdfIn PDF document text
    • https://s3.amazonaws.com/zinudipir/statistical_quality_control_exam_questions_and_answers.pdfIn PDF document text
    • http://magetasejo.epizy.com/elements_of_poetry_worksheet_7th_grade.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_off0000e168.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE168 5168 bytes
SHA-256: 7897a07dee0de0c635632050f9a3b2a1b18d59ae984756f5d0453ec82e725600
font_01_sfnt_off0000f2ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2EF 10884 bytes
SHA-256: 1b438c78f8a6ca2328357498c91bbbe4eb594c7be5460845b83216c93fec6365

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