Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c4b8fc8e73c4fb4…

MALICIOUS

PDF

63.6 KB Created: 2021-02-25 13:58:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: c2ca029f2da3f38036e70f14591f9b9b SHA-1: d6f409995da355e5e6e65257e35390b0423a6b99 SHA-256: 9c4b8fc8e73c4fb435b2993aac8e60eec6358709e7483e891c07e2ef6506ea54
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to 'leonvi.ru', which is likely part of a phishing or credential harvesting attempt. While no scripts were explicitly extracted, the PDF structure and embedded URI suggest it's designed to redirect users to a malicious site, potentially for phishing.

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://leonvi.ru/wb?keyword=does%20ap%20style%20use%20the%20oxford%20comma PDF link annotation
    • http://mists.space/definicion_de_asfixia_perinatal001yo.pdfIn PDF document text
    • http://my-favshopc.online/lolinedefozoe44es.pdfIn PDF document text
    • http://nuloriwilorij.scienceontheweb.net/excel_vba_array_formula_example.pdfIn PDF document text
    • http://rodsfish.club/carvedilol_msdsuxk0t.pdfIn PDF document text
    • https://cdn.sqhk.co/numavagoko/BigjbhL/gosen.pdfIn PDF document text
    • http://xrootunited.com/the_standard_dental_insurance_employer_loginkniq0.pdfIn PDF document text
    • http://neyroskakalka.site/music_ringtones_teluguy2iet.pdfIn PDF document text
    • https://cdn.sqhk.co/nejibija/0Vknlih/default_keyboard_mac.pdfIn PDF document text
    • http://ijmalan.xyz/how_to.cite_apaz1ekk.pdfIn PDF document text
    • http://lapitubemexidi.mywebcommunity.org/tujefijidaka.pdfIn PDF document text
    • http://3203epworthcres.com/blackberry_10_os_desktop_software_freemob44.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/mokuwanibof/frozen_songs_free.pdfIn PDF document text
    • https://s3.amazonaws.com/tobobowu/nazutovuko.pdfIn PDF document text
    • https://s3.amazonaws.com/juduk/duplicitous_information_synonym.pdfIn PDF document text
    • https://s3.amazonaws.com/tupofelasujewas/2013_kawasaki_brute_force_750_owners_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/zarelusipofox/fovafuvipu.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_off0000bf7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF7E 5564 bytes
SHA-256: a40655b6d3083a46028d3fbf438310c4938874bd5226541bca7488c82706611c
font_01_sfnt_off0000d25a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD25A 9140 bytes
SHA-256: cf6ffde2d4dbc239e77e74da1df12d20b032626f78aeeb256403bc70b8b93973

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