Malicious PDF — malware analysis report

Static analysis result for SHA-256 42f975fde5a2050f…

MALICIOUS

PDF

76.3 KB Created: 2021-02-17 14:40:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: ab6923007ecb840ead87cbb089b715ec SHA-1: 31e9c4a2f9729c157940045ccde738c0c72397a1 SHA-256: 42f975fde5a2050fa7144e6b4f5cccf0714b78c49f4ce68de40c51003e6b3716
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 specific detection of 'Pdf.Phishing.Trojan'. It contains an embedded URI pointing to a suspicious domain, 'leonvi.ru', which is likely part of a phishing or scam campaign. The document body, though heavily obfuscated, suggests a pretext related to professional communication, further supporting a phishing attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://leonvi.ru/123?utm_term=how+do+you+respond+to+a+thank+you+professionally PDF link annotation
    • http://masterpowerpoint.com/calpers_457_address_change_formub9qc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378831/normal_5fcd09c66bffe.pdfIn PDF document text
    • http://english-10.site/minority_report_cast_lara_vegai1uoj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462986/normal_5fe6dc7b830d8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470224/normal_60174b6b6a36e.pdfIn PDF document text
    • http://jisurokaz.22web.org/captain_sim_757_fsx_free.pdfIn PDF document text
    • http://sellforce.ru/gym_shower_without_flip_flopssuyr1.pdfIn PDF document text
    • http://kernig.pro/norenubor5jf0j.pdfIn PDF document text
    • http://honey-love.ru/ethics_of_authenticity_criticismwvci6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410953/normal_5fd7c784bf0d2.pdfIn PDF document text
    • http://tovelksa.website/tomo-chan_wa_onna_no_ko3liip.pdfIn PDF document text
    • http://ourfanz.com/73345809285emjvu.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/woxotopapozokev/cet_bed_online_form.pdfIn PDF document text
    • https://s3.amazonaws.com/pizivurapab/carers_allowance_claim_form.pdfIn PDF document text
    • https://s3.amazonaws.com/jipowumat/christ_college_school_uniform.pdfIn PDF document text
    • https://s3.amazonaws.com/tojazudibumogab/les_miserables_abridged_version_sparknotes.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_off0000ee34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE34 5348 bytes
SHA-256: 17d92fc9cc17263a3c3ea2e173196841f42fce7c73eadf488ff8f42f3bbe234b
font_01_sfnt_off00010078.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10078 10316 bytes
SHA-256: abb18145775415ac3f5374e32ae1f169ec958866038ca8c2a2a6e121008a5763