Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a4d03d075f52985…

MALICIOUS

PDF

73.5 KB Created: 2020-11-13 22:33:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: fee2a97ed60856498bd4329035acdd28 SHA-1: b8c4c69e2ed4b43874674cc6f6719d86fb0f7cfb SHA-256: 5a4d03d075f52985cd6bfc3705e9e9bb0363f0cc313d2a0decd11a287c3df679
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 detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to 'https://trafficel.ru/123?utm_term=salt+lake+city+jeff+payne', which is likely used to deliver a malicious payload or conduct phishing. The document body appears to be obfuscated or corrupted, but the presence of the external URI and the malware detection strongly suggest a phishing or malware distribution attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://trafficel.ru/123?utm_term=salt+lake+city+jeff+payne PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4413714/normal_5fac4057d4549.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389821/normal_5f94218c09428.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385852/normal_5f984c961ba83.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459914/normal_5fa7a3eb7c1c1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389616/normal_5f9d5c9a642ce.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408594/normal_5f96e0832293d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410679/normal_5f962355c8cac.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401697/normal_5f97cde4882db.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385028/normal_5f939e2bb4f5e.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/padadutiseni/gezipof.pdfIn PDF document text
    • https://s3.amazonaws.com/pujirageg/comparing_three_digit_numbers_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/voropa/written_treatments_for_documentaries.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6b68ba17-5e42-4231-ae2f-552c2d0347a5/zatukegedegajekepovofo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d09a90a-5812-4727-90bb-5c778e8a859d/quien_soy_yo_para_que_me_amaras.pdfIn PDF document text
    • https://s3.amazonaws.com/roware/ecological_footprint_definition.pdfIn PDF document text
    • https://s3.amazonaws.com/nerugiraxura/91316910774.pdfIn PDF document text
    • https://s3.amazonaws.com/fulosobezur/vixef.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_off0000e413.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE413 5080 bytes
SHA-256: 0b9fb5262a3df0c34f5c830993792479e65cfa0916998ef0da03f8e0d595bd2b
font_01_sfnt_off0000f58e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF58E 10440 bytes
SHA-256: 498a9a87dd077a2591886f73614f9345b48a17ac785e051b4474414901fb72e3

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