Malicious PDF — malware analysis report

Static analysis result for SHA-256 361496bb85312f34…

MALICIOUS

PDF

73.3 KB Created: 2021-02-27 10:08:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: aa33b6c18523625f7a4c672cc069f921 SHA-1: 1e443650e15551cf5de9cae8e031432a3b778f66 SHA-256: 361496bb85312f34d74ad17376c83719dbf044ec1de51c1b8b1988021326733e
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URI pointing to a suspicious URL, and ClamAV detection confirms its malicious nature. The ML classifier also flagged it with high confidence. The document body, though heavily obfuscated, appears to contain text related to the URL, suggesting a phishing or redirection attempt. No scripts were extracted, but the presence of external URIs indicates a likely attempt to lead the user to a malicious site.

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://leonvi.ru/wb?keyword=is%20the%20double%20down%20back%20at%20kfc PDF link annotation
    • http://noksipals.online/354590972893f49m.pdfIn PDF document text
    • http://lokogosomezik.iblogger.org/mathematics_and_statistics_for_data_science.pdfIn PDF document text
    • http://muwusus.iblogger.org/68054572493.pdfIn PDF document text
    • http://trenolgia.buzz/diary_of_a_wimpy_kid_deep_end_release_dated8k75.pdfIn PDF document text
    • http://hurricane1.space/30384112551bg5z8.pdfIn PDF document text
    • http://zoguponuwuxoli.medianewsonline.com/cub_cadet_lt1050_deck_belt_keeps_coming_off.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/faxaxos/khali_bali_song_padmavati_pagalworld.pdfIn PDF document text
    • https://s3.amazonaws.com/najubu/tebenejib.pdfIn PDF document text
    • https://s3.amazonaws.com/gurafoga/rules_of_interrogative_sentences_in_reported_speech.pdfIn PDF document text
    • https://s3.amazonaws.com/voxazedisula/how_many_days_to_do_the_road_to_hana.pdfIn PDF document text
    • https://s3.amazonaws.com/nabifovu/tevuwunedezen.pdfIn PDF document text
    • http://kadebenatoloxib.rf.gd/keynote_presentation_templates_free.pdfIn PDF document text
    • http://paritoxo.rf.gd/sebogubifupumeduxoledazo.pdfIn PDF document text
    • https://s3.amazonaws.com/bisapovepizaj/xopewov.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_off0000df8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF8C 5248 bytes
SHA-256: dcc6065c5646feb87dc4584d3c27eb16c0c07f6f887a172a5523de062e8980dd
font_01_sfnt_off0000f179.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF179 11356 bytes
SHA-256: 9ba92543154abe008d18f64e3c0c5945ed02d7ef770717dbe5fe30a9d5605246

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