Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a47ca4d61611557…

MALICIOUS

PDF

74.0 KB Created: 2020-12-27 03:55:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 39901edf74bed3f625efe8a7a2f4d5d7 SHA-1: e1d1fa59f1a46b1900fcfa5ea29802631f7e6a84 SHA-256: 4a47ca4d6161155767bf05797cf0571e35c522cd2e8e1019fe9ae83c795c1847
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to 'traffset.ru', which is likely used to redirect the user to a phishing site or download a secondary payload. The document body appears to be obfuscated or corrupted, preventing a clear understanding of its specific lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://traffset.ru/aws?utm_term=evernote+template+bullet+journal PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4413375/normal_5f963006004b6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366630/normal_5f9e055691cba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379035/normal_5f8c505178af2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4462992/normal_5fc49c30dcccb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373998/normal_5fa58e94b04c3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484999/normal_5fd1e676cdb71.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416921/normal_5f9d2e1bb0b86.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410448/normal_5faddebcb4d6e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413465/normal_5fc846c13a032.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393785/normal_5f9c44a1e6d20.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f098af0-8f19-4f4f-a6db-ad41f2c1ac9b/guide_to_getting_it_on_9th_edition.pdfIn PDF document text
    • https://s3.amazonaws.com/latufenaw/7135061676.pdfIn PDF document text
    • https://s3.amazonaws.com/novipaliwid/asm_handbook_volume_6_welding_brazing_and_soldering.pdfIn PDF document text
    • https://s3.amazonaws.com/pobixedele/54230652429.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ee125242-5e54-436f-9e2c-995142f3ea53/nevada_mo_high_school_basketball_schedule.pdfIn PDF document text
    • https://s3.amazonaws.com/wegugus/concepts_of_self_care_deficit_theory.pdfIn PDF document text
    • https://s3.amazonaws.com/ronatiduzoxij/sample_resume_for_aws_architect_beginner.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_off0000e2f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2F4 5020 bytes
SHA-256: 9babddb4a4e4169dde4c3a7b06a92fee655fbdc758e250bce41153140f371d64
font_01_sfnt_off0000f3f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3F7 11124 bytes
SHA-256: 8e3d5f54469512ff96722e696d30bfd536a5fb13015718fb8d62e90b58da9257

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