Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb23abddb13b35d2…

MALICIOUS

PDF

89.1 KB Created: 2021-04-29 01:59:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: ba8f12081aeb85cf6012c231531977b5 SHA-1: 521f16283412a248d8a6da841155af2c19d37325 SHA-256: fb23abddb13b35d2859b2e549d1aa7ee063a369c390557779c8979a5a6b7ab68
96 Risk Score

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 0.9998

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://xezojetit.ru/strik?utm_term=netgear+-+smart+ac1600+dual-band+wi-fi+5+router+review PDF link annotation
    • http://xugutolajon.22web.org/fuzugeforozaludabupigidet.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446035/normal_605003d1b8c57.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489587/normal_60373ff184140.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411001/normal_60117c5237efd.pdfIn PDF document text
    • http://kalukawuwo.mygamesonline.org/69977791589.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366005/normal_603c1f784631f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370304/normal_5ff5318f6380b.pdfIn PDF document text
    • http://gavokofubafixi.getenjoyment.net/al_quran_ul_kareem.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kugezukakig.rf.gd/preliminary_scope_statement.pdfIn PDF document text
    • http://luxajoja.epizy.com/centroides_de_areas.pdfIn PDF document text
    • http://nadiripu.epizy.com/giguzifajobofuluxuzuboka.pdfIn PDF document text
    • https://s3.amazonaws.com/bomupi/instrumentos_para_la_recoleccion_de_datos_en_una_investigacion_cientifica.pdfIn PDF document text
    • https://s3.amazonaws.com/jolunenafobuw/44193853363.pdfIn PDF document text
    • https://s3.amazonaws.com/lixuduwonifa/dapumune.pdfIn PDF document text
    • http://lopakesuzuw.atwebpages.com/ltp_dictionary_of_selected_collocations_download.pdfIn PDF document text
    • https://s3.amazonaws.com/luropi/kanege.pdfIn PDF document text
    • https://s3.amazonaws.com/bajapovogam/vag_com_vcds_18._9.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_off00011a41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A41 6104 bytes
SHA-256: b0b6c2da6ce4eec7739cb5c74b74dea2cf758123621bfc93e6a17cd5b64c40e2
font_01_sfnt_off00012f1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F1F 11124 bytes
SHA-256: 104efc5136d001c5256f95f724171d658d290681de66f0c521bd452b32f3cb81