Malicious PDF — malware analysis report

Static analysis result for SHA-256 89e3f3f06a59b42c…

MALICIOUS

PDF

78.0 KB Created: 2021-02-24 07:01:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 97dc7f0d02c8e107eb2b62d2b84f422c SHA-1: a0ab4fba00391c3b38eb8b2386cfc6feb64bd4f2 SHA-256: 89e3f3f06a59b42cbcae11f3a9500bd57e4994e0f03b3e62ff27d19eb9c247a2
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that directs to a domain associated with phishing or malware distribution, masquerading as an 'answer key'. ClamAV detection and ML classification strongly indicate malicious intent. No scripts were extracted, but the presence of a suspicious URL within the document body is a primary indicator of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://leonvi.ru/wix?keyword=10th+answer+key+2020 PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4415051/normal_60033c44b5894.pdfIn PDF document text
    • https://cdn.sqhk.co/xeloxilava/giaQjbq/pottery_barn_christmas_stockings_2016.pdfIn PDF document text
    • https://cdn.sqhk.co/relulapezele/7UwieHU/mymtn_app_download_free.pdfIn PDF document text
    • https://cdn.sqhk.co/vipabure/zvjaifm/78588465453.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485703/normal_6002f3da08440.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4469365/normal_6003176aae323.pdfIn PDF document text
    • http://xeeewq.xyz/shiv_chalisa_in_bengalihj6vm.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459791/normal_5fffcd7c3669d.pdfIn PDF document text
    • https://cdn.sqhk.co/butiluluvuk/jdjePhi/sally_hansen_crackle_nail_polish_walmart.pdfIn PDF document text
    • http://udilische.club/501772148289978o.pdfIn PDF document text
    • http://help-violation.com/the_thief_of_always_movienlwyb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4487916/normal_5fe3fb19c96aa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tizelimanux.rf.gd/dark_souls_3_lothric_castle_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/penefelomiju/create_a_worksheet.pdfIn PDF document text
    • http://xumizimewimapa.epizy.com/how_to_use_winch_without_remote.pdfIn PDF document text
    • http://bubomikofar.epizy.com/formal_letter_reason_absent_class.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e9a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9A6 5228 bytes
SHA-256: f37fc390bc689ffd1d88f5553b0b01c9b201511ca9842b37071b99a2fc6a16c8
font_01_sfnt_off0000fb79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB79 1712 bytes
SHA-256: 21e08c9e098e8ef01b329287e9efef18d21ee9a274f8fe04589064eb316b9f9a
font_02_sfnt_off000103fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103FE 10948 bytes
SHA-256: 78d4da65486e798a6e884650f9eb936489ff201cf55cd2227c21cd3cfff88bfb

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