Malicious PDF — malware analysis report

Static analysis result for SHA-256 d331221f7afc17fb…

MALICIOUS

PDF

72.0 KB Created: 2021-01-02 18:58:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 9d82a30951d7f10ac11d79528bddd353 SHA-1: 84f337d058d2b3213bdb20fdd7fef82cfbc6a641 SHA-256: d331221f7afc17fb178948f13c506a4c7363060c7a67a4a6ffb6e03814c2a951
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URI pointing to a suspicious domain, likely intended 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 redirect the user to a malicious site, potentially for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://trafffe.ru/123?utm_term=biopsychology+john+pinel+9th+edition+pdf PDF link annotation
    • https://cdn.sqhk.co/tivuzofep/OOiihjP/4_immagini_1_parola_di_3_lettere.pdfIn PDF document text
    • https://cdn.sqhk.co/sawapevodef/gNSXiiL/80736624967.pdfIn PDF document text
    • https://cdn.sqhk.co/zudilubal/NMjfRjN/88610013015.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/biwubeleba/android_best_antivirus_free_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/jadudusujuje/lagubopujifepexiwose.pdfIn PDF document text
    • https://s3.amazonaws.com/lemefofutomapox/directv_guide_refresh.pdfIn PDF document text
    • https://s3.amazonaws.com/murudute/outlook_abwesenheitsnotiz_template.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/irs_publication_17_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/tefelaj/hearing_vs_listening_quotes.pdfIn PDF document text
    • https://s3.amazonaws.com/samopakamefap/88582766459.pdfIn PDF document text
    • https://s3.amazonaws.com/luxaduzimase/nutunukotivomuxobi.pdfIn PDF document text
    • https://s3.amazonaws.com/mexijegedakol/xodinosajerato.pdfIn PDF document text
    • https://s3.amazonaws.com/xalasawu/kevilabezudupij.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_off0000dc66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC66 5492 bytes
SHA-256: 2043465a66ee49576c161ea0f89cc688ebc07bc7d97be8636545116b99f81e59
font_01_sfnt_off0000ef31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF31 10588 bytes
SHA-256: 27ceea6be5ba78ed8faf2e54b5e715bc34a7698c53afac5189d4e85754725581

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