Malicious PDF — malware analysis report

Static analysis result for SHA-256 b8194598c9d5b0fe…

MALICIOUS

PDF

96.5 KB Created: 2021-03-09 19:25:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: d21b284b1eebe669a6192a41bcc2bd63 SHA-1: 9418a90fe20256332c33bd3bb62e7769ab9f965e SHA-256: b8194598c9d5b0fec2630b93be97770ed7e83787ec9b04c398e7d05513b82e0b
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 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 phishing lure designed to redirect users to malicious content, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://crophysi.ru/123?utm_term=guardian+university+guide+2019+methodology In PDF document text
    • https://static.s123-cdn-static.com/uploads/4450034/normal_5fcf1fc7c503c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427091/normal_603b5f46077ec.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416149/normal_5ff912c6955d1.pdfIn PDF document text
    • http://namibav.iblogger.org/walmart_near_me_hours_of_operation.pdfIn PDF document text
    • http://airbin.top/bewubaguzokatsg651.pdfIn PDF document text
    • http://rapegutuxipik.22web.org/wordpress_homepage_page_template.pdfIn PDF document text
    • http://burrrhey.tech/physician_assistant_jobs_san_diegoa9cig.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387939/normal_603030d35f00d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4405639/normal_5ff7740931588.pdfIn PDF document text
    • http://klossheff.xyz/tolota2g2yz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367903/normal_5ff2bb3672b9c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416136/normal_5fc924e7cc792.pdfIn PDF document text
    • http://xeeewq.xyz/easy_pumpkin_carving_face_templates7lalg.pdfIn PDF document text
    • http://zatodawu.iblogger.org/vosawituxutosapiga.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425921/normal_5ffae85b05cad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484380/normal_602f8efef223a.pdfIn PDF document text
    • http://khareedforosh.com/minaronefasuzavawoxokolx6s9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420432/normal_5fdc2e4a4baa3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403271/normal_6045faeb8fc08.pdfIn PDF document text
    • http://vbruti.site/54613814926a1sl2.pdfIn PDF document text
    • http://regetun.22web.org/geredigenubib.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
    • http://vopepogam.rf.gd/august_rush_rhapsody_sheet_music.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_off00012b71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B71 5796 bytes
SHA-256: 2533aec4f29ec63d74ff5acbeb96aacc560a6202085be30510d668540ddb4320
font_01_sfnt_off00013f10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F10 11484 bytes
SHA-256: 2cc446182035dad251e34f9b6f235dc53c51be7e81798485418c0019351a8fee
font_02_sfnt_off00016622.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16622 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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