Malicious PDF — malware analysis report

Static analysis result for SHA-256 4772fe8335c7c767…

MALICIOUS

PDF

76.0 KB Created: 2021-04-20 07:40:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 5d07b3b83468b559a9c6e89b524496e3 SHA-1: b24ac7cfdb8e83dbde505bcb38356a70e899a55a SHA-256: 4772fe8335c7c767b31b0ad6ce716b17f52d7a065bf0cbba4e535e995dd9cdf0
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 0.9993

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://vilenefex.ru/strik?utm_term=can+mechanical+engineers+be+mechanics PDF link annotation
    • http://littlenat.space/analog_and_digital_time_worksheetspfsqv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369165/normal_600f78b278b9f.pdfIn PDF document text
    • http://floradoma.net/peveluzogozebuvoritem07bai.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393785/normal_5febe0559dab5.pdfIn PDF document text
    • http://autolombardpro.ru/piremawanadunomofalisuujo7q.pdfIn PDF document text
    • http://igcopyrightforhelps.com/42997828574mncvy.pdfIn PDF document text
    • http://my-credit.info/crossed_aldol_reaction_mechanismmskuw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473632/normal_60293661c87b8.pdfIn PDF document text
    • http://freshmind.net/xagurubexere229f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485946/normal_605c63c782af6.pdfIn PDF document text
    • http://deutschebank-meine.com/lenovo_g50-80_ram_slots3ou20.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/zufaxepixiguxax/navy_reserve_personnel_records.pdfIn PDF document text
    • https://s3.amazonaws.com/wofaxil/bed_sets_twin_sheets.pdfIn PDF document text
    • https://s3.amazonaws.com/bawalidamovidud/buddhism_in_nepal.pdfIn PDF document text
    • https://s3.amazonaws.com/vojapu/hourly_gantt_chart_excel_template_free.pdfIn PDF document text
    • https://s3.amazonaws.com/kosipefojaw/women_s_business_casual_attire_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/poguvelefa/vokolorimodejidasilu.pdfIn PDF document text
    • https://s3.amazonaws.com/jefazaxal/economic_loss_doctrine_virginia.pdfIn PDF document text
    • https://s3.amazonaws.com/lewuli/dd_3.5_divine_might_feat.pdfIn PDF document text
    • https://s3.amazonaws.com/febopa/cricket_fast_bowling_tips.pdfIn PDF document text
    • https://s3.amazonaws.com/devuxuzejozam/89621117467.pdfIn PDF document text
    • https://s3.amazonaws.com/meludav/20868411946.pdfIn PDF document text
    • https://s3.amazonaws.com/fasomusogapovi/chinese_history_a_new_manual_2017.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_off0000ec69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC69 5260 bytes
SHA-256: 735aadd288d9382e8b68b58c4c4fcb7ce884f6fc05e5f189913247ba9cd91fcc
font_01_sfnt_off0000fe19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE19 10528 bytes
SHA-256: 39309bf2201b2af5634fa52c34e80ba2e508d8e5497978914ffb26821c24772c

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