Malicious PDF — malware analysis report

Static analysis result for SHA-256 8956457d51e2c91f…

MALICIOUS

PDF

70.3 KB Created: 2020-11-24 23:47:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 347c30ad178c6b3dd9f661c80f6df4fe SHA-1: 117af47ad8a052866acbda8d887e78e698bfab5a SHA-256: 8956457d51e2c91f13e67092ca66f2dd1b14db2bfff62c518abb342acfee2238
154 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 routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://cctraff.ru/strik?utm_term=the+root+word+dorm-+means In PDF document text
    • https://zegojipoxe.weebly.com/uploads/1/3/1/0/131069766/mabuw.pdfIn PDF document text
    • https://nuvitofoje.weebly.com/uploads/1/3/4/6/134640236/4060059.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375195/normal_5fa8add1e58bd.pdfIn PDF document text
    • https://rezivunafotete.weebly.com/uploads/1/3/4/3/134354631/bilerepod.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446380/normal_5f9e5f3c430e2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/0dbc8205-5811-4600-aa07-cfc12bb253af/brevoy_pathfinder_ethnicity.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/502bdabf-ef19-4857-b0be-a2cf74b20091/windows_7_xdark_deluxe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6675c54c-c579-43bd-9db7-2523ae5cc167/whatsapp_apk_pour_windows_phone.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aa827c2a-2f7c-49c7-a1fd-3827eefdf51b/79927866285.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bc860bff-c083-4a2c-a42c-87e1389c2c38/fichas_de_numeros_del_1_al_10_para_imprimir_en.pdfIn PDF document text
    • https://s3.amazonaws.com/wujapu/jitojivatenetori.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_off0000cb76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB76 4844 bytes
SHA-256: 9f2b55f6c6ce552bb41f890b6f2bdf93c02c841bd550a43ffe5d21ac04f4e737
font_01_sfnt_off0000dbd2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBD2 10256 bytes
SHA-256: 172cf188c5150ee5f9ad7dae4c2a73e93e6df62fba9e4d8eed297850fb8b582e
font_02_sfnt_off0000febb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEBB 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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