Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac94c74bcd3b93be…

MALICIOUS

PDF

79.2 KB Created: 2021-05-13 23:58:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 10c7d5422e2cd90caa93f8abd4fc9897 SHA-1: 1d5ca1235c3867802ca4d2c66d0e0c25ef1aea7f SHA-256: ac94c74bcd3b93be9d085a85f4748ee3a508754e938f8484de54d6150daad9e1
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

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://kuzutuzo.ru/strik?utm_term=lenovo+t430+drivers+bluetooth PDF link annotation
    • http://weinmvc.net/64014018875k817m.pdfIn PDF document text
    • http://ruzamaji.getenjoyment.net/alexander_pope_books.pdfIn PDF document text
    • http://batmbatm.ru/dont_starve_calendarmow3s.pdfIn PDF document text
    • http://academic-club.ru/edit_free_mac_osfaewa.pdfIn PDF document text
    • http://technodom11.com/josaa_medical_certificate_format_2020afvgz.pdfIn PDF document text
    • http://wozilimesiz.mypressonline.com/computer_laboratory_manual.pdfIn PDF document text
    • http://tusiteguluvora.getenjoyment.net/kemorizuresasabemujawirod.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dagewokoxigu.rf.gd/new_bollywood_video_songs_2017.pdfIn PDF document text
    • https://s3.amazonaws.com/wegemebufojafak/kobevezowojoziganiluvotot.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f78d8868-acdb-45f3-a3d5-4a12e67c0d4c/finakofigugogifuvekev.pdfIn PDF document text
    • https://s3.amazonaws.com/wanasuvedigo/43080285149.pdfIn PDF document text
    • https://s3.amazonaws.com/paropabaru/functional_life_skills_curriculum_for_students_with_intellectual_disabilities.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9c8dee5a-8d31-4f63-8e03-fcf7b783b524/ffxi_dancer_guide_2019.pdfIn PDF document text
    • http://mevalegija.rf.gd/lodetatodixerupoti.pdfIn PDF document text
    • https://s3.amazonaws.com/mujevubutukoxu/wunemonolidexodeked.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/19f0ab5a-aa12-427c-a744-ac25b5665f28/canon_pixma_mx922_review_uk.pdfIn PDF document text
    • https://s3.amazonaws.com/suxugipipolazog/sample_chemical_safety_data_sheet.pdfIn PDF document text
    • http://wijobofeforot.epizy.com/87807512067.pdfIn PDF document text
    • https://s3.amazonaws.com/wakuzidi/20921690029.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/503e80e4-e82e-42cb-9da3-0d8f5d23cf9e/andrew_foster_deaf_community.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000de20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE20 5240 bytes
SHA-256: ac972d2d4afc324d35401016c5cbb7e4ea51426f46d357307622438047acb3e4
font_01_sfnt_off0000eff9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFF9 14860 bytes
SHA-256: 70083e63aea09d529a9ab01e3e88636a54f4a1a1116de400c97cc7b8ef2a1818
font_02_sfnt_off000119e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119E3 16288 bytes
SHA-256: ef0fe5e4c3df87daa3c22f420b1c38346ade548d775f49ca8892d494fcc58392

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