Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f2c8f16c73530cc…

MALICIOUS

PDF

155.5 KB Created: 2021-03-20 09:12:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fc7ec502fb74ca70b258e30e9356bf70 SHA-1: dd1f24f70eb63ba6420363b219cf0395fcc9af4d SHA-256: 1f2c8f16c73530cc41735d63186da9950b8afca96b07cb858119e21c89819fb1
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with a high risk score. It contains an embedded URI pointing to 'https://leonvi.ru/123?utm_term=paytm+bedsheets+combo', which is likely a phishing lure. The document body, though heavily corrupted, contains fragments suggesting a commercial offer ('Paytm bedsheets combo'). The presence of multiple unknown URLs further supports a phishing or malicious redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://leonvi.ru/123?utm_term=paytm+bedsheets+combo
    • http://quickpapp.online/java_web_service_api_examplexvc2e.pdf
    • http://boxojov.22web.org/befubev.pdf
    • http://masterpowerpoint.com/how_to_write_a_chaotic_evil_characteroandx.pdf
    • http://uspehdnyaaxyz.xyz/nomao_camera_application_free_for_android8dj0k.pdf
    • http://health-top.ru/retusigedoebvh8.pdf
    • http://wotomonexu.22web.org/vujudad.pdf
    • http://pubaninuw.22web.org/xaxapigakujunabezapugi.pdf
    • http://about-fb-support.com/does_chiari_malformation_cause_nausear22e0.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/zidosozawok/danimamuna.pdf
    • https://uploads.strikinglycdn.com/files/64ebae2f-cb20-43e1-8818-3a5d946f72c2/world_map_continents_and_countries_printable.pdf
    • https://uploads.strikinglycdn.com/files/06403df7-572b-42a5-b254-f9b750de0eac/11_22_63_movie_quotes.pdf
    • https://uploads.strikinglycdn.com/files/985c9eb1-e687-4de9-b9c4-b2faf2a6080c/56381943615.pdf
    • http://fafalibowadavuz.rf.gd/up_mailbox_template.pdf
    • https://s3.amazonaws.com/jefazaxal/6506826108.pdf
    • https://uploads.strikinglycdn.com/files/43977a5f-5428-4e84-befc-892af152428d/77921583143.pdf
    • http://fukogalijikufoz.epizy.com/spinal_cord_injury_classification.pdf
    • https://s3.amazonaws.com/jazofi/sogafewipidasunisif.pdf
    • http://fumidafowinub.epizy.com/heated_throw_stopped_working.pdf
    • https://s3.amazonaws.com/timituvupame/96608791016.pdf
    • https://s3.amazonaws.com/feliso/zisebiniwigowewokixupurer.pdf
    • http://nasewuji.epizy.com/35570321173.pdf
    • http://fulisawuxulinis.rf.gd/up_b._ed_syllabus_2020_download.pdf
    • http://tinifumapej.rf.gd/51650721370.pdf
    • https://uploads.strikinglycdn.com/files/8777e2c9-3883-4147-ba69-498e14d668e3/aircraft_maintenance_engineer_avionics_jobs_australia.pdf
    • http://mikipifovusi.epizy.com/light_novel_overlord_volume_13_bahasa_indonesia.pdf
    • 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0002289b.bin
08a490ce32f2ec0e34f6009b284ebf6b14d9f4847e4cf8787be2fb1eb7a130b7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2289B 5296 bytes
font_01_sfnt_off00023a81.bin
3ad70dc89dd5f061c7610d55421e0d099e835899233d94a3df7c469a6291f4a3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x23A81 10772 bytes

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