Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a7a40877aa2e80a…

MALICIOUS

PDF

77.5 KB Created: 2021-05-23 07:05:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: b97bb263d2aa61c5d56b58a5dad58995 SHA-1: 3db6ada185cd2310be214f1710c0849110e97eae SHA-256: 9a7a40877aa2e80a0b515c67d9f52b29bb6d86e60c712c12c3acb83fc62d5cf6
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that directs users to a suspicious domain, likely for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to trick the user into navigating to a malicious site, aligning with spearphishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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
  • 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://vilenefex.ru/strik?utm_term=how+to+install+ibm+spss+statistics+23 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4497109/normal_6050743eda2ad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385009/normal_5fd67de4c50a1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497697/normal_606b4363a3298.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426422/normal_6008ba849223f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443337/normal_6045d511bb9c1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454556/normal_60567c2b4c583.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410954/normal_604145c730626.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391620/normal_604b479b521e9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453560/normal_60150dffac808.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/eb655ef8-a4cc-4852-9380-32a5667f83d1/77867560863.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d88555d-5637-4e6b-9eaf-9bb1d8736fc4/what_is_human_factors_engineering_in_healthcare.pdfIn PDF document text
    • https://s3.amazonaws.com/fejififimaketo/kupigivomusalavipivate.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6f85faa4-a328-4fa4-b6fa-fc994e754724/mexevevunurivon.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/89140f4b-a81e-4918-a9fc-c42c67db422e/why_is_my_rv_fridge_not_getting_cold_enough.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f2af34da-16ce-45fe-a484-36f5e8aafc28/9470010223.pdfIn PDF document text
    • https://s3.amazonaws.com/mujevubutukoxu/fourier_analysis_on_compact_groups.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fba1c470-26fd-4854-a49c-059a1e882b20/para_leer_al_pato_donald_audiolibro.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c8e98f64-6929-4576-b27b-efc4c548c8ee/38015764261.pdfIn PDF document text
    • https://s3.amazonaws.com/ladiwuzetawedi/86096384809.pdfIn PDF document text
    • https://s3.amazonaws.com/furunumaroxun/bb_racing_mod_apk_for_pc.pdfIn PDF document text
    • https://s3.amazonaws.com/besafefaf/graco_magnum_x7_airless_paint_sprayer_price.pdfIn PDF document text
    • https://s3.amazonaws.com/lorifumofelu/67596702250.pdfIn PDF document text
    • https://s3.amazonaws.com/gonima/tajinovoxojerepilefowaxe.pdfIn PDF document text
    • https://s3.amazonaws.com/vibuvomomuv/all_modal_verbs_with_examples.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_off0000ef78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF78 5472 bytes
SHA-256: 500fe3519fbe32af5f83232af90162507e84cf343315ace895877797c3ef8ae6
font_01_sfnt_off00010216.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10216 11164 bytes
SHA-256: 75b59d03999c7bbb1c17321ffb5f55a648d4d633333859ac5f0cb046e41ef6ef

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