Malicious PDF — malware analysis report

Static analysis result for SHA-256 1acbdf66026b1788…

MALICIOUS

PDF

74.5 KB Created: 2021-03-01 17:40:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: b65c39473a6bcacfa9231d864cf98286 SHA-1: 59d9151203e6a437c43f0b9115d8dea645fb6b89 SHA-256: 1acbdf66026b1788521774798c87391f2ae30c1717a459d42ed3f2ffebb3c772
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing attempt. It contains an embedded URL that leads to a suspicious domain, likely intended to deliver a malicious payload or redirect the user to a phishing site. The document body, though heavily obfuscated, suggests a lure related to an 'answer key' for scientific data analysis.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://kuzutuzo.ru/strik?utm_term=analyzing+and+interpreting+scientific+data+pogil+answer+key+pdf PDF link annotation
    • https://cdn.sqhk.co/baruduwege/i49eJSb/us_pet_population_growth.pdfIn PDF document text
    • https://cdn.sqhk.co/gotuxixovumu/didRibt/23767461061.pdfIn PDF document text
    • https://cdn.sqhk.co/tatidukigag/bgikig0/stackable_rings_gold.pdfIn PDF document text
    • http://weareanonymous.org/37425436205az2l0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465012/normal_6017df39e105f.pdfIn PDF document text
    • http://se-mrush.com/15623796167ub9fu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448337/normal_5ffd2350add80.pdfIn PDF document text
    • https://cdn.sqhk.co/batitiviz/7gfiglf/fadobulamip.pdfIn PDF document text
    • https://cdn.sqhk.co/zigotimuti/Hhij6Ak/1000_switzerland_currency_to_usd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485318/normal_5fd8614d522dd.pdfIn PDF document text
    • http://prizinsta24.site/46228249386hy3jz.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/gedimuta/satuzobadajinutupag.pdfIn PDF document text
    • https://s3.amazonaws.com/jokotaziweluge/jual_mesin_dough_sheeter_bekas.pdfIn PDF document text
    • https://s3.amazonaws.com/medaliwifufugel/23577850156.pdfIn PDF document text
    • https://s3.amazonaws.com/redegelesibif/edc_canada_annual_report.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_off0000e5a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5A1 5620 bytes
SHA-256: 241e34c7aebeec9b2c8d9f72173f8264e2d37d52e8402a42f1c381d090d16e65
font_01_sfnt_off0000f902.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF902 10452 bytes
SHA-256: 76216852f9a5c5d46d4fd257d85a02acf73910b8a046e23eae979d9e42217563