Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb28cb148bcdecc9…

MALICIOUS

PDF

78.5 KB Created: 2020-11-26 04:03:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 32b6d38362f15682e6bc04da6a127bcb SHA-1: 2ae84f0a8790c24a49c48f12c181cdc16cc0a815 SHA-256: fb28cb148bcdecc9458d26fc08c49cae2ed0e28f6c9d1c29dcda77f8502c75f0
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 ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URL pointing to 'trafftec.ru', which is likely part of a phishing or malware distribution scheme. Although no scripts were explicitly extracted, the PDF structure and embedded URI heuristic suggest an attempt to redirect the user to a malicious site.

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
  • 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://trafftec.ru/123?utm_term=wings+of+fire+nightwing+icewing+hybrid PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4377115/normal_5f9421af0a0be.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404740/normal_5fa3116a7ad49.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403541/normal_5fa2ac655d134.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376125/normal_5f9eaf6bd874b.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/94f27af7-6cd3-4543-b851-211e66986668/58361086735.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/239bb1bd-beca-43e5-ab64-70b149d7ef99/36037387435.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files2/iron_defender_5e.pdfIn PDF document text
    • https://s3.amazonaws.com/pewibim/paypal_app_for_pc.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1dc30d79-2aab-4c6b-b674-920a00e00164/42983038440.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c909962-0464-478b-8c8c-dff1b96fef90/56123567671.pdfIn PDF document text
    • https://s3.amazonaws.com/tetofamuxulil/adobe_illustrator_edit_text.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ea21a89c-879d-4899-9511-9311351d8abb/63819824746.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4fa9ad4f-6d77-4925-a6b5-811baddc641d/kendo_grid_footer_template_mvc.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f357a1c-d633-43b2-9d9d-0d089daf28d7/91840347852.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/473f582b-e92b-455d-8b10-a3191cc9d789/sound_devices_and_figurative_language_crossword_puzzle_answers.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_off0000f374.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF374 5388 bytes
SHA-256: e434954f1e26bae874352956a7c737e4c68abfd0babdd2aea467f1705ac31854
font_01_sfnt_off000105ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105EC 12244 bytes
SHA-256: 8575763f6610616c677c44230094dad3016f75153d5d454d3518c154c728a5be

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