Malicious PDF — malware analysis report

Static analysis result for SHA-256 9443798bdc2f327a…

MALICIOUS

PDF

83.9 KB Created: 2021-03-12 18:36:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: f80695b61f487567e30ba52c5659ec75 SHA-1: a6132e0284b3a43de4453d7820da6f3b1a67f342 SHA-256: 9443798bdc2f327a8fa62a7dd86ea130c90ca85ddaac78c5411e43040dddfe1f
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, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a common attack pattern of luring users to external malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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
  • 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://dafemum.ru/123?utm_term=annual+report+layout+design+template In PDF document text
    • http://wemuwetafivaxe.sportsontheweb.net/my_fios_voice_remote_wont_pair.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370052/normal_60238693f0062.pdfIn PDF document text
    • http://fanisore.sportsontheweb.net/what_is_the_white_queen_based_on.pdfIn PDF document text
    • http://delofozolavobi.22web.org/singer_esteem_ii_2273.pdfIn PDF document text
    • http://file-id.ru/moto_g_power_launch_date5skdb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389581/normal_602fc42d2ec81.pdfIn PDF document text
    • http://ecoservice-vlad.ru/12560270319k8tfs.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422909/normal_602a00b74ce4b.pdfIn PDF document text
    • http://static-start.top/97815430732m9mfd.pdfIn PDF document text
    • http://euroshopmn.space/47083079944ukwl5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446917/normal_5fc6822cd1f7f.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/ladojenefe/8451099034.pdfIn PDF document text
    • https://s3.amazonaws.com/tezofuretejom/nuloxo.pdfIn PDF document text
    • http://badowivisoruk.rf.gd/18260912856.pdfIn PDF document text
    • http://badamowafe.onlinewebshop.net/nunox.pdfIn PDF document text
    • https://s3.amazonaws.com/jizubisetebof/marksheet_loan_customer_care_number.pdfIn PDF document text
    • http://kemaduxisi.epizy.com/manual_of_veterinary_echocardiography.pdfIn PDF document text
    • https://s3.amazonaws.com/xoxaneral/wubilisavubi.pdfIn PDF document text
    • http://zunijakokusageg.epizy.com/download_reader_gratis_kuyhaa.pdfIn PDF document text
    • https://s3.amazonaws.com/rexogeguxosix/peaky_blinders_imdb_parents_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/wajibile/sheet_metal_gauge_chart_stainless.pdfIn PDF document text
    • https://s3.amazonaws.com/jadere/75414806847.pdfIn PDF document text
    • https://s3.amazonaws.com/rujabepifar/adb_debug_android_app.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_off00010b7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B7F 5368 bytes
SHA-256: f94ab0d8427a88cd07f089c8486189cdb8e383668e715efcd74d9b49035b3526
font_01_sfnt_off00011dbd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DBD 10696 bytes
SHA-256: 630d25fcf11602dc24513d600cb89dff0a7a736e2d1e0e33191b665ee9852860

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