Malicious PDF — malware analysis report

Static analysis result for SHA-256 c153268a61394d09…

MALICIOUS

PDF

74.8 KB Created: 2021-03-31 04:01:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: a2ce2bf850f5285da22c339a5a0500c8 SHA-1: 979544cc85daa0be12e8db2ead7d0ad8fccf675b SHA-256: c153268a61394d09b64b00c6f417e68165983fa92edea49abd92e8d3b73df0f5
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 0.9997

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://lozipotod.ru/award?keyword=biology+mcq+question+pdf+download PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4414682/normal_60492d8508d0a.pdfIn PDF document text
    • https://cdn.sqhk.co/gilisuvunu/dhbjegf/sherlock_holmes_books_in_marathi_free.pdfIn PDF document text
    • https://cdn.sqhk.co/pesuxigu/idif8jO/61055476759.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388407/normal_601d925019398.pdfIn PDF document text
    • https://cdn.sqhk.co/vejanozugova/EZfgjrL/shreya_ghoshal_songs_tamil_list.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385633/normal_5fcc6b0fe69d5.pdfIn PDF document text
    • http://forisawidokomor.sportsontheweb.net/14138799631.pdfIn PDF document text
    • https://cdn.sqhk.co/sategexarom/ijicje4/bewutepizifukizovi.pdfIn PDF document text
    • https://cdn.sqhk.co/voxedijudibo/dgjgcge/parkour_run_unblocked.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446017/normal_605f7a186ecc2.pdfIn PDF document text
    • http://riwalimuj.scienceontheweb.net/automates_finis.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/fukepez/dobekogasotifiwumemowawo.pdfIn PDF document text
    • https://s3.amazonaws.com/vovuzize/47622969702.pdfIn PDF document text
    • https://s3.amazonaws.com/tiniruru/2950462606.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f68ea00e-e8de-4baf-850e-21b8217df25f/2005_buick_lacrosse_blower_motor_problems.pdfIn PDF document text
    • https://s3.amazonaws.com/pokixovuxik/xivovif.pdfIn PDF document text
    • https://s3.amazonaws.com/kaxukok/lebuv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b6958f8c-cf95-4a9d-b33d-ace5abe34cc1/kadep.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/14cee39c-8081-445c-b23f-8b0a7530a616/igloo_kool_mate_40_specs.pdfIn PDF document text
    • https://s3.amazonaws.com/wivunonovef/filekudegavutilakuf.pdfIn PDF document text
    • https://s3.amazonaws.com/doxifuba/backup_exec_16.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_off0000e68b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE68B 5748 bytes
SHA-256: 44a3c606803690157c95828de1d4eee214921ee2c2776a7f20b28c82b288b58c
font_01_sfnt_off0000fa2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA2C 10536 bytes
SHA-256: 671f0fddccdd0f890c17091247dfb776da18ec05377d0fb239012d3a5b25c020

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