Malicious PDF — malware analysis report

Static analysis result for SHA-256 5537066875f48dbd…

MALICIOUS

PDF

67.0 KB Created: 2021-03-19 00:42:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: 1d9df14db9dd0642e4c7ea8b7d9def35 SHA-1: ab9fcff5ca0de222ce4f1b2a76fad6342c28610e SHA-256: 5537066875f48dbd063500bfd3af4b3decbd7ab162acffbc5169fd6653de6c7e
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://yafferge.ru/wix?keyword=maritza+notary+reading+pa'. This indicates an attempt to direct the user to a malicious site, likely for phishing or malware distribution. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the embedded URL is the primary indicator of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://yafferge.ru/wix?keyword=maritza+notary+reading+pa In PDF document text
    • http://dojaligiwojop.22web.org/complex_sentence_worksheet_3rd_grade.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404310/normal_603d7c2e46161.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4492600/normal_60050982c720a.pdfIn PDF document text
    • http://nurigufasuvunu.iblogger.org/pojizonurinuva.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466996/normal_603de0c987479.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501654/normal_5fcecb83cfe5b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://denuvadejo.rf.gd/banorte_telefono_para_reportar_tarjeta.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/88197b6e-5671-4331-abbd-0138718a4276/what_is_the_best_app_to_learn_chinese.pdfIn PDF document text
    • https://s3.amazonaws.com/gozifep/a_good_low_carb_diet_menu.pdfIn PDF document text
    • https://s3.amazonaws.com/sivanira/mujowurimelir.pdfIn PDF document text
    • https://s3.amazonaws.com/buponuwebi/pu_admission_form_2018-_19.pdfIn PDF document text
    • https://56db2a4d-09ce-4ff6-a558-abb1d6727cd4.filesusr.com/ugd/003b86_efe8e48642e34642b600b09bfc3ef874.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/8e9dcf91-6bc9-4254-82ab-9097ade8ecf9/vetoraretojozeremu.pdfIn PDF document text
    • https://f62823ea-e863-4eb7-bd7c-e3bac0139ff1.filesusr.com/ugd/8c639a_91ea67065aa34be9af82b935d73fdec8.pdf?index=trueIn PDF document text
    • http://lebelolejesupo.rf.gd/gorivarewopelapega.pdfIn PDF document text
    • https://s3.amazonaws.com/devuxuzejozam/vuzanikogegodiganijavole.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb61ecfb-4998-4d75-aece-d4f2a78cf755/84449414275.pdfIn PDF document text
    • http://luvopekun.epizy.com/70816367451.pdfIn PDF document text
    • http://genoropafetado.epizy.com/format_of_writing_certificate_for_school_project.pdfIn PDF document text
    • http://jilevatawew.epizy.com/u_l_s_i_ka_full_form.pdfIn PDF document text
    • https://61090d85-22e6-4724-b969-52a17785150c.filesusr.com/ugd/952c2e_d68f63c6a28e42b7973dc91eca92f39a.pdf?index=trueIn 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_off0000ca2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA2F 5072 bytes
SHA-256: 948d03add138305906e42a493fd1c4656d970f1d73a7d153011b4126e71374e0
font_01_sfnt_off0000db9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB9D 10292 bytes
SHA-256: 5527d4b9c46c1d639f182dd986203eee7e7bde720e36becb78b8c2a1b364dcda

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