Malicious PDF — malware analysis report

Static analysis result for SHA-256 79969d9f77e3f0bb…

MALICIOUS

PDF

75.6 KB Created: 2020-12-21 21:45:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: f85abb712b8d5118106b4b3c92c706ea SHA-1: b8e29f1ef919cbe3adfacef9290a00269b4a8cdb SHA-256: 79969d9f77e3f0bb437c0762827a11e2d728a963814125c4d40e65dbd1d945c3
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 by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URL pointing to 'trafficel.ru', which is likely the primary lure. Although no scripts were explicitly extracted, the PDF structure and the presence of external URIs suggest it's designed to redirect the user to a malicious site, potentially for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://trafficel.ru/123?utm_term=sandpoint+waterfront+property+management PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4416321/normal_5faed820cb6c6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414174/normal_5fa832b860ed5.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/fajeloninesitel/71468712971.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fce9598804da917c4305306/t/5fd1aa57b91f50015eeb10f6/1607576152249/original_3d_crystal_puzzle_t-_rex_instructions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6b2c765a-357b-4dfd-add1-354b037914b0/sipun.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/92743d09-05ad-4498-8271-3a84a3b015d3/tafiladozefij.pdfIn PDF document text
    • https://s3.amazonaws.com/gurowozenupifi/basic_knowledge_of_ms_office_in_hindi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3cdd2942-1dc0-4850-99d0-64c8c5586da7/removedor_de_manchas_organicas.pdfIn PDF document text
    • https://s3.amazonaws.com/kubafezin/pazenigulabakateresoval.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb2a2f3c-0d90-4871-94b9-8e0d953e38d3/derogawatipoweseses.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a24032af-565e-456d-8b73-68741fef221f/san_elijo_campground_reserve.pdfIn PDF document text
    • https://s3.amazonaws.com/jifesu/kaxemixulodekuwaxapal.pdfIn PDF document text
    • https://s3.amazonaws.com/xakapudakadu/battle_cats_special_cat_guide.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_off0000eb19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB19 5448 bytes
SHA-256: 094bdec658c1933aa5b330ab28537dc0992b8347d683f426d9e0a2a60790a4df
font_01_sfnt_off0000fda8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDA8 10704 bytes
SHA-256: 3d55998707542180c9f202f45c92336999222f366bdf4cc727e286896ab0d2a7

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