Malicious PDF — malware analysis report

Static analysis result for SHA-256 b56a2c14d1dcb106…

MALICIOUS

PDF

75.7 KB Created: 2021-04-16 11:30:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 85d9eb7e60810c3b07069f7a7208ffc4 SHA-1: 95e3535afb749b6aed4238b3e0d666727bba1f39 SHA-256: b56a2c14d1dcb106b559d3f5355b8fbf7f585dc4b92ff63b57a127dfe245bf8a
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file is a PDF containing an embedded URL that points to a suspicious domain, identified by ClamAV as Pdf.Phishing.Trojan. The ML classifier also flagged this PDF with high confidence. The presence of an external URI and the ClamAV detection strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://jacksth.ru/strik?utm_term=breville+juice+fountain+cold+plus+assembly PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4476580/normal_603f095f9e83b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371244/normal_6020524325a8b.pdfIn PDF document text
    • http://sivolejujivozul.scienceontheweb.net/capital_expenditure_and_revenue_expenditure.pdfIn PDF document text
    • https://cdn.sqhk.co/vapitinab/Yggifgh/46558900957.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417834/normal_601b69b6076f6.pdfIn PDF document text
    • https://cdn.sqhk.co/pemejurove/gZOghK3/nail_salons_open_in_simpsonville_sc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386080/normal_6054eb56e15bc.pdfIn PDF document text
    • https://cdn.sqhk.co/dudosugebo/ih3icgc/atarax_dosage_for_panic_attacks.pdfIn PDF document text
    • https://cdn.sqhk.co/gofejenizew/tgjagAu/10345186603.pdfIn PDF document text
    • https://cdn.sqhk.co/tuvameboroke/nicibia/26138700048.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458852/normal_601444f040a7d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481166/normal_605fc0b70a1cd.pdfIn PDF document text
    • https://cdn.sqhk.co/mosikojilat/hb6jdji/helicopter_strike_battle_3d_for_pc.pdfIn PDF document text
    • https://cdn.sqhk.co/numavagoko/ibjiwge/39592488664.pdfIn PDF document text
    • http://pajuwepubawip.sportsontheweb.net/87762462009.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368768/normal_602ed08183a95.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366050/normal_605cf37fd7e6b.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/xasovewipeje/gaputamizis.pdfIn PDF document text
    • http://liraperuwuw.atwebpages.com/how_to_turn_off_wifi_on_sharp_aquos_tv.pdfIn PDF document text
    • http://peledopa.myartsonline.com/nokumifenigenifel.pdfIn PDF document text
    • https://s3.amazonaws.com/tesotiwapax/75773222477.pdfIn PDF document text
    • https://s3.amazonaws.com/betefowubevat/geotech_engineer_jobs_in_bangalore.pdfIn PDF document text
    • https://s3.amazonaws.com/genedonapubefe/33105958172.pdfIn PDF document text
    • https://s3.amazonaws.com/xafaxotaful/fipidokezi.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_off0000e7c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7C0 5728 bytes
SHA-256: 8cc6a0cb66a425d66caaf730faaa7aeed0f8acd9ae359676e0503995cfc2331f
font_01_sfnt_off0000fb37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB37 10544 bytes
SHA-256: 37bcfd4945e326e508c109bda766950026858398b9a0e4f8d99b56bc9ec62a53

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