Malicious PDF — malware analysis report

Static analysis result for SHA-256 a53e67032be2308b…

MALICIOUS

PDF

74.4 KB Created: 2021-02-17 07:31:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 2aa08c92003bd7d17e5ae57f8d21552f SHA-1: 823c85c61846f67a619444f18b5bc05c867c15ce SHA-256: a53e67032be2308b88b52e4c88f7fa92b63bf29782d2c0eedc4bd2a2e326453d
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://baarspo.ru/wix?keyword=unsweetined+pdf+free PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4393889/normal_5fd82dbf4da11.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445868/normal_5fea0bb6580bc.pdfIn PDF document text
    • http://devicesprotectionforusers.site/41363942486sspms.pdfIn PDF document text
    • http://habirovradik.ru/bimakimfohsa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496146/normal_6002d17268db1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376619/normal_5fd05f5c841c7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443799/normal_5fe8cf6209c55.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451021/normal_5fde3cf717079.pdfIn PDF document text
    • http://mkr-olimp.info/6th_grade_saxon_math_booklkyoq.pdfIn PDF document text
    • http://teagreen.space/fajabubelolodejuwuh70uq.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414672/normal_5fcbdcab8609e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4529977/normal_5fdf0ec1680cd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383568/normal_5fffc4c127ce8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4458625/normal_5ff4ed75a427e.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/setikizo/vedaf.pdfIn PDF document text
    • https://s3.amazonaws.com/wenobagupexekap/zojujizezawamiwinano.pdfIn PDF document text
    • https://s3.amazonaws.com/wanalovum/a_letter_whatsapp_status_video_mirchistatus._com.pdfIn PDF document text
    • https://s3.amazonaws.com/sezewu/cherry_hill_public_schools_teacher_salary_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/fejakixoweka/31929136932.pdfIn PDF document text
    • https://s3.amazonaws.com/fejififimaketo/spanish_to_english_numbers_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/sizabo/pekobivigeletexekemon.pdfIn PDF document text
    • https://s3.amazonaws.com/tibanepoxilibud/kg_cardboard_sheet_online.pdfIn PDF document text
    • https://s3.amazonaws.com/kevava/coulomb_s_law_example_problems_with_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/winumigutam/22798123221.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_off0000e82a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE82A 4876 bytes
SHA-256: 39b7ca0dc6ae08e61fd0fe9a68b3932a8553319852d766a0111be58b8da2ae56
font_01_sfnt_off0000f8ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8EA 10608 bytes
SHA-256: ac7061273fc0ffea3350a1d57c7aba15cae157e1996550733cea9ba169edc333

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