Malicious PDF — malware analysis report

Static analysis result for SHA-256 67c14b6a3b394c04…

MALICIOUS

PDF

76.7 KB Created: 2021-05-11 16:45:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5323c2c348114344437ad5a6bfac89ae SHA-1: b15a035b19b0c179cd7927b4e8b2d733b38be830 SHA-256: 67c14b6a3b394c048058824e143cebc3f2a7f0dd4e530512bee0269309b319bd
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 high likelihood of malicious intent. It contains an embedded URI pointing to 'https://jacksth.ru/strik?utm_term=amar+chitra+katha+books+pdf', which likely serves as a lure to download further malicious content. The presence of multiple external URLs suggests a phishing or credential harvesting attempt.

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://jacksth.ru/strik?utm_term=amar+chitra+katha+books+pdf
    • http://uscreditinquiry.info/86760784047aeepj.pdf
    • http://kepogosibasenip.iblogger.org/70527251014.pdf
    • https://cdn-cms.f-static.net/uploads/4447885/normal_6031139e94815.pdf
    • http://kutakelipaxeb.22web.org/business_dashboard_templates_powerpoint.pdf
    • http://leqqurint.online/76077979366jevio.pdf
    • http://art-practice.org/nomigesmmqi0.pdf
    • http://toolsbestpricemicrometer.site/lovez04lks.pdf
    • https://cdn-cms.f-static.net/uploads/4467277/normal_6029d5916db38.pdf
    • http://vertitribe.store/5886443683gk8p8.pdf
    • http://nunanokipikade.22web.org/battle_cats_crazed_cow_guide.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://sezusin.rf.gd/project_risk_management_books.pdf
    • https://f77c8dad-41d7-4a8f-8d8d-c05149a3a236.filesusr.com/ugd/36d413_4e312dddbf6945f1aa982e89ba16ccc5.pdf?index=true
    • https://2521c3e2-5736-45bb-9381-71005f2ffa37.filesusr.com/ugd/c85705_0b3338e603f845bf832352d9bfeaab3b.pdf?index=true
    • http://mimosoxokilufaf.epizy.com/xakidazoleg.pdf
    • https://s3.amazonaws.com/dafumuxitupav/how_to_be_smart_in_mind.pdf
    • https://s3.amazonaws.com/tuzamada/google_chrome_android_bookmark_bar.pdf
    • https://s3.amazonaws.com/nuvukivaxiren/naxinukuzuxisigiwizu.pdf
    • https://s3.amazonaws.com/dujepav/93099213636.pdf
    • https://s3.amazonaws.com/xoferuzu/crochet_patterns_for_bernat_super_bulky_yarn.pdf
    • https://2b81f3f0-3f46-42ff-87a7-5865dd96cd3c.filesusr.com/ugd/fb41f9_a3d3c9ae6d8f482f83953a0a16f91418.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ddc3.bin
e287220ff9079fda8934334a99ab0ed2380e5561184efb14119827a0df29e353
pdf-font-stream PDF embedded font (sfnt) at offset 0xDDC3 5556 bytes
font_01_sfnt_off0000f06e.bin
6436214169b01c95aa4e7afad8a6a3267c933459c02c19a7dfb487bc885f5cd0
pdf-font-stream PDF embedded font (sfnt) at offset 0xF06E 4152 bytes
font_02_sfnt_off0000ffb1.bin
1d946cb97f72c77626e71efc86fcd85a0ca03107b495707750e452ef47ff0136
pdf-font-stream PDF embedded font (sfnt) at offset 0xFFB1 11204 bytes