Malicious PDF — malware analysis report

Static analysis result for SHA-256 56332667714ac6d9…

MALICIOUS

PDF

67.9 KB Created: 2020-12-25 19:43:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: f250cfa64f05b0814e158903108b559f SHA-1: 662690dbcac61647b369e4016aed5ad0f64f196a SHA-256: 56332667714ac6d9ca8ad4e2c00869f5a7844f719e9cc0500b042422681bcfcd
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URL. The ML classifier and ClamAV both flagged this file as malicious, with high confidence. The embedded URL points to a suspicious domain and is presented in a context that suggests a phishing lure, likely to download a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://traffnew.ru/aws?utm_term=soundcore+liberty+air+owners+manual PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4494875/normal_5fb936edda88f.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/bipovoromoj/better_homes_and_gardens_azalea_ridge_swing.pdfIn PDF document text
    • https://s3.amazonaws.com/xajowu/gemiti.pdfIn PDF document text
    • https://s3.amazonaws.com/xopugup/z_camera_photo_editor_pro_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/bajuse/excel_macro_dim_as_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/tedowafomaru/pudopidawugesim.pdfIn PDF document text
    • https://s3.amazonaws.com/sivanira/dubeloj.pdfIn PDF document text
    • https://s3.amazonaws.com/memul/nunikimosalabobex.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6899ac8c-851c-434b-ac93-3237bea23164/72779435590.pdfIn PDF document text
    • https://s3.amazonaws.com/woxewiwupir/49660724711.pdfIn PDF document text
    • https://s3.amazonaws.com/xulepiwa/1337242382.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b8cd854e-120f-40c1-8931-970e718793f9/dodalotewuxejuxopum.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/20794569-1535-496c-85f7-ffc54e334c26/tevupug.pdfIn PDF document text
    • https://s3.amazonaws.com/mipizaju/wepikukuwalo.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_off0000caff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAFF 5524 bytes
SHA-256: 9dadc5f1694d78c16182fe85bf379904360e0f3cc1ffefb66a08225878dbe961
font_01_sfnt_off0000ddc5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDC5 10792 bytes
SHA-256: 3ed7bd9300319cae32a91b9ebbf05baac67aab5fcd934938096458f2231666d4

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