Malicious PDF — malware analysis report

Static analysis result for SHA-256 10ca6736385917c8…

MALICIOUS

PDF

85.8 KB Created: 2021-05-02 00:35:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9579cde1247e1c78ae0546cbdc8b56be SHA-1: d5c0d4f79e9d00dd1c3b5212b3a69e85e9326d67 SHA-256: 10ca6736385917c8177139da1c8106d1f6df7386e79c9bc504863e6b31b59312
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://zajinet.ru/strik?utm_term=are+amscope+microscopes+any+good', which is likely a phishing lure disguised as a search result. The document body is heavily obfuscated, preventing a clear understanding of its direct content, but the presence of the malicious URL and the detection signatures strongly indicate a phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://zajinet.ru/strik?utm_term=are+amscope+microscopes+any+good
    • https://cdn.sqhk.co/pubabolab/jiaQjau/80379540847.pdf
    • http://elinekici.online/55397803189fqu5t.pdf
    • http://karma-911.com/how_to_connect_yamaha_receiver_to_speakers7swgj.pdf
    • https://cdn.sqhk.co/linewebozid/hbiiidz/97084841196.pdf
    • http://levelupguild.com/trai_h_si_tnh_c_v_b_trnqb7j8.pdf
    • http://nibitekafo.22web.org/d-link_dsl-2750b_change_password.pdf
    • http://bazezirovif.iblogger.org/apprendre_ayatoul_koursiyou.pdf
    • http://batut.space/zixute859vt.pdf
    • https://cdn.sqhk.co/nodewanase/ZWkHjiO/3927438825.pdf
    • http://milanbeach.fun/how_to_cure_shoulder_tendonitis_at_home68agj.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/zuwimadaneb/resosavifutufoduwi.pdf
    • https://eb72eaa1-ef55-40a3-a653-f6d21bccf295.filesusr.com/ugd/54913d_61f884388f6145548a4d1522a5368414.pdf?index=true
    • https://s3.amazonaws.com/zukogi/le_petit_nicolas_film_complet_en_francais_streaming.pdf
    • https://29474179-7c7c-44ae-84e0-3c37792f2e25.filesusr.com/ugd/7f817d_c8a7ef06a9004d8499507ca1113c1a1a.pdf?index=true
    • https://s3.amazonaws.com/tuletivotarupu/beautiful_landing_page_templates_psd.pdf
    • http://winovewivigo.rf.gd/56884433423.pdf
    • https://3f3b26af-a357-4ab7-b723-baa2d0f6bb2b.filesusr.com/ugd/5d6e2e_f661d8a829744f99991a06b090546dc1.pdf?index=true
    • https://s3.amazonaws.com/nonabafat/64260409907.pdf
    • https://s3.amazonaws.com/vavale/what_is_portfolio_in_wordpress_theme.pdf
    • http://suramakoto.epizy.com/tebuwodajexunozopilajifek.pdf
    • http://jusujewepexu.epizy.com/vegaxajegirirut.pdf
    • https://e0220c8c-c322-4c33-af83-7c5b0fe00b66.filesusr.com/ugd/a771bd_0669164f418046fe833fca969a817321.pdf?index=true
    • http://roragopijejem.epizy.com/heap_income_guidelines_rochester_ny.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_off0001110b.bin
e2e83ff5822b99fe8341c7e2cc2bbeaa61f275dcdded5f3371b4062287dd38fd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1110B 5452 bytes
font_01_sfnt_off0001238c.bin
ba188defcb0ab1cba83bd9052b925d13811e80430e3da2f52e80c9520ce22a62		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1238C 11192 bytes

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