Malicious PDF — malware analysis report

Static analysis result for SHA-256 847cd0f9ac41348a…

MALICIOUS

PDF

78.0 KB Created: 2020-12-22 14:48:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: ff1da41ebbff23903f2f0796879f1317 SHA-1: d1de6692645eab3734d4949ff373b8f63b77493b SHA-256: 847cd0f9ac41348a7a771ea9622f570691f09ef2fc65b11f547d34101b6cc9e1
96 Risk Score

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 'trafftec.ru', which is likely a phishing or scam lure disguised as event information. The document body, though heavily obfuscated, contains text that appears to be a pretext for the malicious link.

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=romeo+peach+festival PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4369765/normal_5f8b772d843eb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475582/normal_5fc3cf1763d78.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4505159/normal_5fc730b512051.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365635/normal_5f87b146f1693.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/5f12dd20-b52b-45fc-962d-f6055f6f2e8a/nupun.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1975bcf2-fd49-4427-8a5c-ed955b886edd/fativolotivujefuwo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ebc8cd97-5c38-466c-a3be-72d52cba32d8/kamaris.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a5bb0146-c0f9-4645-85f3-fe517f941e84/cheatham_county_library_kingston_springs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f9ad3df6-ab67-4ab0-a363-41586e06d5c0/kogaf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9a27195e-d4c3-41ac-9e07-cd7ceb53c5b6/71596094544.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8f6c59cd-13f5-4695-98d4-6056aa5c52bc/zenotiwemuvababizudu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a2be23e7-ec4a-4f3b-9f43-74a8ddb07f98/what_level_does_seedot_evolve_in_omega_ruby.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/285aa8e4-3a31-4208-87c9-589c30b7e133/doziseganonanavoralox.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e3eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3EB 4908 bytes
SHA-256: ce0ed35c315b2460ebec0d4ec958491c4fa0adee4167414175c13a07a313933a
font_01_sfnt_off0000f4ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4AE 12188 bytes
SHA-256: c68df11b973290ffb3dcf7b01bdc5943c14ac53ebac5ecaba7857008e9a25a2a
font_02_sfnt_off00011cc9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CC9 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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