Malicious PDF — malware analysis report

Static analysis result for SHA-256 c4274377a9bde92e…

MALICIOUS

PDF

71.3 KB Created: 2021-02-27 19:00:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: c07088d7b113ee351e3afe653301d464 SHA-1: 715f130c24f5014506beecbbdf0939415b236218 SHA-256: c4274377a9bde92e56141300fb23dddc842d6322bf87364be03a1443e29c69a8
96 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The embedded URL and document body suggest a phishing lure, directing the user to a suspicious domain. No scripts were extracted, but the presence of external URIs and the overall detection profile strongly indicate a phishing attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://seumenha.ru/strik?utm_term=ps+form+3600-ez+2019 PDF link annotation
    • http://xuvaxujogilo.mygamesonline.org/rod_oa_rotates_counterclockwise_with_a_constant_angular_velocity_of_4_rad_s.pdfIn PDF document text
    • http://mobufuwiwid.medianewsonline.com/josaxupefofuxafobufog.pdfIn PDF document text
    • http://sujabupinoda.scienceontheweb.net/gafuge.pdfIn PDF document text
    • http://xubegureluju.22web.org/trois_gymnopedies_sheet_music_piano.pdfIn PDF document text
    • http://xifadezuzurap.medianewsonline.com/helicopter_mechanic_jobs_near_me.pdfIn PDF document text
    • http://gekodejevotug.medianewsonline.com/release_date_for_tatbilb_3.pdfIn PDF document text
    • http://gufurebu.medianewsonline.com/how_many_hours_do_french_students_go_to_school.pdfIn PDF document text
    • http://nipokaxa.getenjoyment.net/rodipevolariwinipi.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/gurafoga/wikopejalogal.pdfIn PDF document text
    • https://s3.amazonaws.com/timeziso/86445364387.pdfIn PDF document text
    • http://pujumek.myartsonline.com/is_breath_of_snow_and_ashes.pdfIn PDF document text
    • http://nepumunu.rf.gd/m_audio_prokeys_88_service_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/sumesawoxajew/antiaromatic_compounds.pdfIn PDF document text
    • https://s3.amazonaws.com/kefefetafij/dyson_v6_animal_manual.pdfIn PDF document text
    • http://japinoxizidunub.myartsonline.com/magic_chef_mini_fridge_4.3_manual.pdfIn PDF document text
    • http://pujumek.myartsonline.com/zixewobib.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_off0000d9ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9EA 5556 bytes
SHA-256: 8cfb08b0212ef30e3a178ee0b5ef04385b61d6816ae5d58376bc831260727ab3
font_01_sfnt_off0000ecc3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECC3 10540 bytes
SHA-256: d296cea54f1a19d4c5783c53ac0c9933df779239755946af38d5c5df111df554

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