Malicious PDF — malware analysis report

Static analysis result for SHA-256 4197c21dfcc927b4…

MALICIOUS

PDF

79.0 KB Created: 2021-04-20 05:49:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 0b45d668bafce4e2c25be9f7862ef481 SHA-1: 11fd1b2cf62f3e2529afe7ff6a448e1eb28f01e3 SHA-256: 4197c21dfcc927b48a31fa32f5928c154b6183a4c1229c7fa0314bd0e6caa9dd
96 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

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://dafemum.ru/strik?utm_term=how+do+security+groups+work PDF link annotation
    • http://bamiluzigu.mygamesonline.org/tejezi.pdfIn PDF document text
    • http://laketofetujeso.medianewsonline.com/logarithm_and_antilogarithm_table_download.pdfIn PDF document text
    • http://kagivumuro.iblogger.org/how_many_calories_should_i_eat_17_years_old.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/586c41d0-8f99-4655-98ec-10c4c67ca2e6/22781441762.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c523e24-5a31-4281-ac16-b65262694797/quality_management_group_boca_raton.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d33814c2-a8d0-433c-9df5-91e9647cf9da/lupipov.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3255f9dc-1f7c-4d05-91da-cce990d7c18d/kenmore_elite_bottom_freezer_refrigerator_model_795_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/12a93306-3267-4c61-b3fb-1aed3957354c/flysky_fs_i6_2.4_g_6ch_rc_transmitter_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/27dface0-2c11-496d-af81-55fa76f54a07/zopifomobu.pdfIn PDF document text
    • http://vunefukovamin.rf.gd/ring_oscillator.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/95b1831a-f21b-4934-a7f8-cce274ae25e2/88789608488.pdfIn PDF document text
    • http://ripaleje.rf.gd/27870400537.pdfIn PDF document text
    • http://mowoled.epizy.com/60384458502.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9b0d9e7d-5a1d-49c4-9e3e-8d36f42fc3a9/libalapam.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_off0000f8a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8A1 5216 bytes
SHA-256: d8a7664088edee4d32cc2c7ebc2ddc851f5d71257d5cc7cb44e6619eaef3c639
font_01_sfnt_off00010a8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A8E 10632 bytes
SHA-256: 908e2cb7b15d5da48af8f8f0971c4fed0b2cc0c60f45d3fc14f28dcbc2d478eb