Malicious PDF — malware analysis report

Static analysis result for SHA-256 75613908bee2c1a9…

MALICIOUS

PDF

70.3 KB Created: 2021-03-20 09:33:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3858abdcc7ae2dd8c126f5467e13cd13 SHA-1: 88ae6124269635ddf06b2c90b936667c02ff63d6 SHA-256: 75613908bee2c1a91cce0403eb0399643fb10eeea3ad4496ed2b6e6dde795996
96 Risk Score

Malware Insights

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

The PDF file contains a heuristic indicating an external URI, specifically 'https://mezovuduw.ru/award?keyword=epidemiology+and+biostatistics+textbook+pdf'. This URL is presented in a context that suggests a phishing or scam attempt, masquerading as a search result for a textbook. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to 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://mezovuduw.ru/award?keyword=epidemiology+and+biostatistics+textbook+pdf
    • https://cdn.sqhk.co/pujimuxuja/06Vgdhd/protein_tertiary_structure.pdf
    • http://doporujela.iblogger.org/sapna_choudhary_ke_gane_dj_video.pdf
    • https://cdn.sqhk.co/tatogevi/PfwQJjf/evolution_2001_full_movie_download.pdf
    • https://cdn-cms.f-static.net/uploads/4468270/normal_5fd7ce614fee7.pdf
    • http://biwinogivatize.22web.org/kogegawakinigozonis.pdf
    • https://cdn.sqhk.co/tavaxiwugo/GJHhdie/tavufidegum.pdf
    • https://cdn.sqhk.co/puxolika/je3ShhD/bible_word_search.pdf
    • https://cdn.sqhk.co/xexerekija/ifhhHic/jawuwozixotukitosisenaz.pdf
    • https://cdn-cms.f-static.net/uploads/4503617/normal_5fdc6f0a2df06.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://e20d271a-53e3-41f9-9180-d6cd5f9fd148.filesusr.com/ugd/6cfc61_c4176f5f2a8c4db4984bd0d780797a5f.pdf?index=true
    • http://gonoxil.rf.gd/95002641466.pdf
    • https://28481333-1ef2-46fb-8ebf-d56c3f24acbc.filesusr.com/ugd/314c35_8fd6122bd1cf41c893181a2b03f7e986.pdf?index=true
    • https://7404da97-7fcf-4d5f-9d5f-3f8644e6773a.filesusr.com/ugd/35f767_2da2a85e5f9446e4b848c1a5f979936b.pdf?index=true
    • http://rojapamun.epizy.com/jowidaragikuxipomilo.pdf
    • http://wirowobizofox.epizy.com/beamer_latex_example.pdf
    • https://c96d0889-97fb-4213-90a4-a08ae01970e6.filesusr.com/ugd/ed32f2_b8a5835270974d6f8f3209748f427cd2.pdf?index=true
    • https://6c9aa500-f8d9-42a6-b8a4-5b3c562bbfc3.filesusr.com/ugd/543886_4289e03c9fea46d9ae20404a7ca06595.pdf?index=true
    • http://lulawutereb.rf.gd/franz_kafka_books_in_order.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_off0000d489.bin
7ffacf1b78e174d60bb45fedbcac01f321d43708d28374f0c2bfb961039e5aad
pdf-font-stream PDF embedded font (sfnt) at offset 0xD489 5708 bytes
font_01_sfnt_off0000e801.bin
7603f229263d1b69d887e85d527b1339f4e21380bbd0a5c378c8887c09a46e78
pdf-font-stream PDF embedded font (sfnt) at offset 0xE801 10612 bytes