Malicious PDF — malware analysis report

Static analysis result for SHA-256 bdba7704a66ef8a8…

MALICIOUS

PDF

74.3 KB Created: 2021-02-19 23:03:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: befe54aaad1fb632ff8522641153c6f1 SHA-1: cc2f1545e908f332e090490b960bf06d4c5b2f15 SHA-256: bdba7704a66ef8a8e5313f8dc4b9e81fc832e5b18dc86178cc0aaee451b35fc8
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, 'https://crophysi.ru/wix?keyword=napa+battery+warranty+without+receipt', which is a strong indicator of phishing or malware distribution. The ML classifier and ClamAV detection further support the malicious nature of this file. Although no scripts were explicitly extracted, the PDF structure and embedded URL suggest an attempt to exploit users through a deceptive lure.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://crophysi.ru/wix?keyword=napa+battery+warranty+without+receipt In PDF document text
    • https://static.s123-cdn-static.com/uploads/4376619/normal_6001660ca73e2.pdfIn PDF document text
    • http://juvasojiwal.66ghz.com/btdf_for_biztalk_2016.pdfIn PDF document text
    • https://cdn.sqhk.co/jonilinenuvo/cSihihU/nunaw.pdfIn PDF document text
    • http://faketikus.22web.org/69930144233.pdfIn PDF document text
    • https://cdn.sqhk.co/tazuxalana/ejK8O4T/80180419597.pdfIn PDF document text
    • http://kuzegajozux.iblogger.org/78524466236.pdfIn PDF document text
    • http://sojipen.22web.org/hcci_engine_seminar_report.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/bamepofewalada/accumulation_phase_value_reporting.pdfIn PDF document text
    • https://s3.amazonaws.com/jusagi/33426408944.pdfIn PDF document text
    • https://s3.amazonaws.com/bisiku/frozen_audio_songs_free.pdfIn PDF document text
    • http://ropobowex.epizy.com/vuxevexibofefovuju.pdfIn PDF document text
    • https://s3.amazonaws.com/senodiw/ar_rahman_tamil_movie_video_songs.pdfIn PDF document text
    • https://s3.amazonaws.com/fukepez/82466678957.pdfIn PDF document text
    • https://s3.amazonaws.com/nafibanefexex/jikibizumaxifap.pdfIn PDF document text
    • https://s3.amazonaws.com/megodipewukitoj/narrative_report_global_handwashing_day.pdfIn PDF document text
    • https://s3.amazonaws.com/kudefem/52896048998.pdfIn PDF document text
    • https://s3.amazonaws.com/fedufiporara/report_bugs_hypixel.pdfIn PDF document text
    • http://wixevudu.epizy.com/gdpr_consent_form_template_free.pdfIn PDF document text
    • http://kebanibaru.epizy.com/xepasasanubo.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_off0000e790.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE790 5116 bytes
SHA-256: 7ae7c0e0ea5274918224ebf84a97409108ea72fd45b7b7b6ecbacab4f8e8c8fe
font_01_sfnt_off0000f90c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF90C 10300 bytes
SHA-256: 3a23355ec0cfccdb0140b519d2cc8e4431bf1dd9a62fda8051b4487a95ed15aa

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