Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b65d1d16aa19375…

MALICIOUS

PDF

88.7 KB Created: 2021-03-07 20:01:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 6ede7ba8e7e6c57b375827380e19539a SHA-1: 5490f671146df3d95c55da227ca2adaff0430322 SHA-256: 4b65d1d16aa19375b597cd45de1f2d20ccadb3107a030003e80e320f4350a0c7
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are SEO-optimized and point to other PDF files, suggesting a link farm or redirection mechanism. The primary URL, https://soxebez.ru/wix?keyword=radarscope+apk+3.13.1, is likely used to direct users to malicious content or phishing pages. ClamAV and ML heuristics confirm the malicious nature of the file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://soxebez.ru/wix?keyword=radarscope+apk+3.13.1 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4450417/normal_6032cb9513b0a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447467/normal_6030d80aa8492.pdfIn PDF document text
    • https://vumazilizulorap.weebly.com/uploads/1/3/5/3/135300666/6506123.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375704/normal_6025f1e8615c2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418175/normal_60126b8b746a8.pdfIn PDF document text
    • https://senakubedezozi.weebly.com/uploads/1/3/1/6/131606366/godutowewepejan-zavajokeliwalo-vixunirubemi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4463286/normal_5fe0f5601e06c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414360/normal_60388872e6ca2.pdfIn PDF document text
    • https://lekaretuzej.weebly.com/uploads/1/3/0/7/130738752/bugipukage_nazetoxuma_zebujerozoziwoz_jebasorexoka.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366989/normal_602a322c43439.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500208/normal_600cb1ebba69a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496013/normal_5ffa998f86c9c.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/gidibesuxi/what_is_the_latest_version_of_android_for_nexus_7.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e7fcb78-665b-4ea2-bc4f-fc7311756a0e/jekekogujitim.pdfIn PDF document text
    • https://s3.amazonaws.com/muvevanepen/chemische_formeln_aufstellen_programm.pdfIn PDF document text
    • https://s3.amazonaws.com/tawosutosuxi/taen_taen_fish_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/lonozote/measurement_conversion_temperature_worksheet_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9f10eee1-4617-4ea3-9bcb-511f79103ea3/25260336252.pdfIn PDF document text
    • https://s3.amazonaws.com/tugafebip/ielts_cambridge_6_listening_test_3_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eee61329-fa48-4a57-af63-d9d77294cc79/86004653500.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d5cdbc0e-96fb-4537-ac2c-69d1c59884e9/different_word_for_tipping_point.pdfIn PDF document text
    • https://s3.amazonaws.com/kukupunopedon/bacilos_gram_negativos_tratamiento.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_off000117ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117AD 5356 bytes
SHA-256: 1ef6476622c541171998fd8735102cd476c757ed60c753cdcc15c3b468825890
font_01_sfnt_off00012a04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A04 13516 bytes
SHA-256: ec10a5fbcbc5dca92d979eefdb14019627af8726372d7815582850bd33adbfe2

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