Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a3ca57337a5100f…

MALICIOUS

PDF

72.5 KB Created: 2021-03-24 10:09:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2d7345ed58d89fb68f06b1b34b5e66b5 SHA-1: 1aff2f44bdb373e8b75820c7ccae759083c61610 SHA-256: 7a3ca57337a5100f6547d5529372df390ee1574784711b241ec2d2089d8bec9b
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to 'https://nipisod.ru/wix?keyword=how+to+set+home+in+minecraft+server', which is likely a malicious link designed to trick the user. The document body, though heavily obfuscated, appears to be related to the URL's content, suggesting a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://nipisod.ru/wix?keyword=how+to+set+home+in+minecraft+server
    • https://static.s123-cdn-static.com/uploads/4450351/normal_5fcaec90bb404.pdf
    • http://rentline.pro/91459497003gev49.pdf
    • https://cdn-cms.f-static.net/uploads/4379500/normal_601ee615d27bb.pdf
    • http://salebox.shop/dias_feriados_en_mexico_2020_por_leyk4dma.pdf
    • http://goodsun.fun/rajefevasiwisuzoporasajiwzbaf7.pdf
    • https://static.s123-cdn-static.com/uploads/4381091/normal_5fed5efa38035.pdf
    • http://buzixivolerat.22web.org/24255561561.pdf
    • http://lg-copyrightforms.com/does_riba_allowed_in_islamzy55j.pdf
    • https://cdn-cms.f-static.net/uploads/4448341/normal_6020c754b94d6.pdf
    • http://tuwafanumi.iblogger.org/90353629973.pdf
    • http://nicechange.space/fl_dcf_reportingh4beb.pdf
    • http://porn77.design/laser_treatment_for_cervical_cancer687wa.pdf
    • http://kulibakux.iblogger.org/atan2_c_performance.pdf
    • http://steblin.pro/bioskop_21_terbaru_2018plteu.pdf
    • https://cdn-cms.f-static.net/uploads/4451356/normal_5fd1ed73ed18d.pdf
    • http://lapebev.iblogger.org/black_templates_for_powerpoint_presentation.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://zekovulelopur.epizy.com/aluminum_oxide_structure_formation.pdf
    • http://gedujelorete.rf.gd/strengthsfinder_domains.pdf
    • https://uploads.strikinglycdn.com/files/09193639-67b3-4d59-aae5-1d417fe78d6c/fujuk.pdf
    • https://uploads.strikinglycdn.com/files/540cb1c1-56a4-473e-9173-a90057564ae8/black_hawk_down_film_streaming_italiano.pdf
    • http://zinipaxafuzonik.rf.gd/23616084755.pdf
    • https://uploads.strikinglycdn.com/files/8208ae85-18f7-43b7-9d00-810ca60046ad/what_is_the_difference_between_formal_and_informal_definition_of_words.pdf
    • http://gorosojipi.rf.gd/beats_by_dr_dre_powerbeats_3_manual.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_off0000ddbc.bin
3fb9e7dc4959c79263c15373689b9209c519e606963726da51d1bc9293fb48f4
pdf-font-stream PDF embedded font (sfnt) at offset 0xDDBC 5200 bytes
font_01_sfnt_off0000ef5a.bin
e7ed0d1ed340d936b1323af3628cf7e7eef16467b4c1e44febe5c987bead7701
pdf-font-stream PDF embedded font (sfnt) at offset 0xEF5A 10888 bytes