Malicious PDF — malware analysis report

Static analysis result for SHA-256 a32375fde256b289…

MALICIOUS

PDF

79.4 KB Created: 2021-04-08 09:30:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: a8e9ffd749cd6f96a10bbe95788cb41a SHA-1: 5f84a1f510891910f7369e2da0feba9b9cf53c32 SHA-256: a32375fde256b289faed1cd4be996d04faf6581ccb06cf292401f65f1e22192c
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file is a PDF containing an embedded URL that leads to a suspicious domain, identified as malicious by ClamAV and ML classifiers. The document body, though heavily obfuscated, suggests a lure related to 'wedding background video'. The presence of an external URI points towards an attempt to redirect the user to a malicious site, likely for phishing or to download a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://ponafet.ru/123?utm_term=wedding+background+hd+video PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4454302/normal_6047a82aa0f5e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465701/normal_6016529480a51.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4456116/normal_5fffcd883ac29.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477386/normal_602d49dff1a89.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380890/normal_5fc61c566ac02.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393489/normal_600127b5f164e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379233/normal_60043a638ed58.pdfIn PDF document text
    • http://vopugixeroramox.medianewsonline.com/abbyy_transformer_3._0_serial_number_crack.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/sojuravewi/computer_basics_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b1a18351-539f-45fe-8954-f443a6976355/what_does_gdp_measure_and_not_measure.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/54f819e5-0e3f-40fc-b090-f3f352b5f89c/veriwopotutovi.pdfIn PDF document text
    • https://s3.amazonaws.com/datarofapakil/gitufovotika.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0f5809d2-f885-4060-a6a8-d43cc491741a/dikivamulomifimex.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7692202f-988f-44b5-a7e4-8454b9df4690/15212227059.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/60e586e7-d779-464d-b952-ed1d7e78a219/learn_to_code_with_scratch.pdfIn PDF document text
    • http://seroritubofa.atwebpages.com/jinutafesupimenewe.pdfIn PDF document text
    • https://s3.amazonaws.com/befarekogol/fufudebopiremeduli.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/43bd6765-d9d0-4984-a52e-dbf514119826/maditikebaxabidirin.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/26120796-0c69-44cb-ac9a-5aa9f2df8851/structure_of_a_text_gcse_english.pdfIn PDF document text
    • http://sovogezo.atwebpages.com/17727405993.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/78084c81-9252-45ef-88e1-fbe4cb52e480/how_to_clean_window_air_conditioner_mold.pdfIn PDF document text
    • https://s3.amazonaws.com/bulozor/65315898091.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0f3fd2d5-3d8c-4109-92a9-d99af649a9a2/9481886242.pdfIn PDF document text
    • https://s3.amazonaws.com/musoxifuvitalo/androidx_cardview_widget.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_off0000f851.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF851 5268 bytes
SHA-256: 4f29d8e3305c1b4496da670323c57369b43c155c03cbfaceb897850f53bd601c
font_01_sfnt_off00010a4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A4E 10696 bytes
SHA-256: ebd3e52fc6455a04018621fc4c448460dcc31edf943892e755cad632edfb76c1

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