Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf075abb9177a5ca…

MALICIOUS

PDF

76.2 KB Created: 2021-05-20 02:43:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 73c6723ddf23470c7d37cc4e16ed27d7 SHA-1: ea05441bb0550fd749db40e8c180980799cc381a SHA-256: cf075abb9177a5ca3bcbcc83314090fd0ef28a0e525b2552b25205c542cc3b15
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 0.9995

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://kuzutuzo.ru/strik?utm_term=cambridge+secondary+checkpoint+past+papers+science+2012+mark+scheme PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4443619/normal_60082bf08a805.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4472774/normal_5ffe6406ebc67.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381095/normal_5fed6d07724bb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476758/normal_60146528750ae.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462096/normal_6036aaa3d6f51.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366309/normal_6021a6f4448f6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390642/normal_60127a83e6069.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489057/normal_601cf98e3eebe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408348/normal_605889e37cade.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404512/normal_6031406de03d9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414164/normal_5fd05ffdc1cc3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413838/normal_6059ec6b8d61a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450721/normal_600bb04073689.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484818/normal_60021d0cb08c0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459936/normal_5fe32c771525c.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/wewuxuviwar/71945700402.pdfIn PDF document text
    • https://s3.amazonaws.com/wibedubosateg/invisible_influence_kevin_hogan.pdfIn PDF document text
    • https://s3.amazonaws.com/nedijowewoded/logic_pro_x_templates_hip_hop.pdfIn PDF document text
    • https://s3.amazonaws.com/woxewiwupir/what_is_better__functional_programming_or_object_oriented.pdfIn PDF document text
    • https://s3.amazonaws.com/fulosobezur/rental_bond_lodgement_form_nsw_online.pdfIn PDF document text
    • https://s3.amazonaws.com/wejuvono/67358911974.pdfIn PDF document text
    • https://s3.amazonaws.com/wemazun/dirigevodezutefamilipojef.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e963.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE963 5992 bytes
SHA-256: 173b07991e66da4fe94887e7ffc757f249803ffa92084369c290172de746fff7
font_01_sfnt_off0000fd9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD9F 10848 bytes
SHA-256: 6e74172f59680eee688fda30011519857acf94907b0b7b9b5ed11c7cbac76173

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