Malicious PDF — malware analysis report

Static analysis result for SHA-256 b49f2f1722a204eb…

MALICIOUS

PDF

85.3 KB Created: 2021-04-05 01:47:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 142f9cb9da610ad19c995b09f9204160 SHA-1: a1d08be799e716782c83db033e04d13fc2b6b413 SHA-256: b49f2f1722a204eb9c5f35c6b9cdaea1fdaef7ebafa204516ab70ea723ceadcd
96 Risk Score

Malware Insights

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

The file is a PDF document identified as malicious by ClamAV and an ML classifier. It contains an embedded URI pointing to a suspicious URL, which is likely intended to host a phishing page or a further payload. The document body is heavily obfuscated, preventing a clear understanding of its specific content, but the presence of the malicious URI strongly suggests a phishing or social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://xajibur.ru/strik?utm_term=business+ethics+and+corporate+social+responsibility+pdf PDF link annotation
    • https://cdn.sqhk.co/vakanaju/PjiihiH/4492457328.pdfIn PDF document text
    • http://zuwifipenabed.medianewsonline.com/3260147517.pdfIn PDF document text
    • http://muwiduvepobuz.mygamesonline.org/obras_de_camilo_jose_cela.pdfIn PDF document text
    • https://cdn.sqhk.co/vofonowul/bt4iagj/dibinoraririsefisasabilu.pdfIn PDF document text
    • http://raguvigawak.mypressonline.com/74217748899.pdfIn PDF document text
    • http://zipubezexupoka.mywebcommunity.org/xenozoic_tales.pdfIn PDF document text
    • https://cdn.sqhk.co/rifusofuwedi/y5Tniib/narcos_idle_cartel_ios.pdfIn PDF document text
    • http://gedozudusinap.mygamesonline.org/internet_marketing_techniques.pdfIn PDF document text
    • http://fuzubijixulux.mygamesonline.org/vemoguseraja.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/lowebemuwojiso/heaven_vc_andrews_casteel_series.pdfIn PDF document text
    • http://lixugafepujijoj.onlinewebshop.net/yamaha_v_star_1100_classic_service_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d219e70-8698-4e96-b2ee-60fb9c3fc19d/la_santa_biblia_online_catolica.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6d1b27e5-0909-44e4-b78a-0e05832b4d27/dimakizum.pdfIn PDF document text
    • https://s3.amazonaws.com/leteraxewe/bibby_coupling.pdfIn PDF document text
    • https://s3.amazonaws.com/gizonukorad/911_methodical_illusion.pdfIn PDF document text
    • http://sofibimibojas.myartsonline.com/wasugofarula.pdfIn PDF document text
    • https://s3.amazonaws.com/wivunonovef/sewemenixut.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/50aaab90-c975-4e50-be39-323debc0fd82/how_to_explain_congruence.pdfIn PDF document text
    • http://jelunegizubu.atwebpages.com/vosinibikos.pdfIn PDF document text
    • https://s3.amazonaws.com/jarirotexab/32696949254.pdfIn PDF document text
    • https://s3.amazonaws.com/lepefi/find_last_used_column_name_in_excel_vba.pdfIn PDF document text
    • https://s3.amazonaws.com/vonusirukete/introduction_to_autonomous_mobile_robots_siegwart.pdfIn PDF document text
    • https://s3.amazonaws.com/fewifuwu/46766601707.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c4ce0a38-9c26-4677-bcba-1253cf0f4add/jiluzol.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_off00010ef3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EF3 5532 bytes
SHA-256: 7c9786b89005c6e23ff2489259bf4479b55e9c7cef792815e9a587dea4fd2a34
font_01_sfnt_off000121c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121C5 11052 bytes
SHA-256: cdaf2e8bb26eda3113676bd1c5ff278db1e9ee9724ee85175915456894c46b69

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