Malicious PDF — malware analysis report

Static analysis result for SHA-256 375494ec8e9821c6…

MALICIOUS

PDF

91.2 KB Created: 2021-05-18 23:24:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: a9f3593632ace742c041525317e9b5f6 SHA-1: f90300e87bb9cd4c57e4867718157c7d4d82fffa SHA-256: 375494ec8e9821c60222ac27309cccadb5e878e4fe72eb80fe29c08053c81e31
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, likely intended to host a malicious payload or redirect the user to a phishing site. The document body, though heavily obfuscated, suggests a lure related to 'Tropical dry forest abiotic and biotic factors'.

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://golowaki.ru/strik?utm_term=tropical+dry+forest+abiotic+and+biotic+factors PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4493282/normal_6019ca594041e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485828/normal_5fcc9bca7addc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475383/normal_5fdb80753bf5f.pdfIn PDF document text
    • http://vukabuv.22web.org/acquisition_strategy_template_dod.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418566/normal_6016e62840e01.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380699/normal_5fc9936266402.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/wazorixekunafob/luwivulanivalazimejozumi.pdfIn PDF document text
    • http://nomikidavex.rf.gd/gakin.pdfIn PDF document text
    • https://s3.amazonaws.com/xupimaral/41659654229.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a49d598-dfcf-411c-9205-a21cbaa84b75/2nd_grade_math_workbook_free.pdfIn PDF document text
    • http://ditiruvovuluka.epizy.com/16935651953.pdfIn PDF document text
    • https://s3.amazonaws.com/fekazudabo/pride_and_prejudice_and_zombies_movie_trailer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ea317e8f-1b21-4a7d-80c9-159aef077d84/powermax_85_error_codes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5cb7a2ca-380f-4642-b497-f56921240afc/2003_saturn_vue_high_output_alternator.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a375295-0d2d-40cd-8954-91a90325e5d5/17118772061.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/187c7f70-91b4-49fe-bcd5-9c58d6dc565e/maths_tricks_for_competitive_exams_videos.pdfIn PDF document text
    • http://ruxududomaba.epizy.com/cantina_band_tenor_sax_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/zoluwivebiro/51583578661.pdfIn PDF document text
    • http://bijoxiwakofavoj.epizy.com/postage_rate_increase_2020.pdfIn PDF document text
    • https://s3.amazonaws.com/sefepugolupalax/pukavokutenuzewaxulexo.pdfIn PDF document text
    • https://s3.amazonaws.com/tumasun/66542532013.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_off0001248e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1248E 5340 bytes
SHA-256: 7735382a1bf7882e7fd3191550154a54daa74034342d78300895e7dbacec27c8
font_01_sfnt_off000136c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x136C8 12272 bytes
SHA-256: 296f4b200ecf83a2eb91fb2549701f25c98259bfe8877009a33d6bb440f4f268

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