Malicious PDF — malware analysis report

Static analysis result for SHA-256 26e57dc5998d41e6…

MALICIOUS

PDF

128.7 KB Created: 2021-05-24 23:44:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 4441fdbbaf07cc1f815b01d9f5c062a9 SHA-1: 98b79f74da182642058b65b53ae28ace6cfb684d SHA-256: 26e57dc5998d41e61ba5271777514526b16e6acbdc2733b1b3ebe4e15f1ab9a9
96 Risk Score

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. The embedded URL points to a suspicious domain, suggesting a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the PDF structure and embedded URI heuristic suggest it's designed to redirect users to malicious content.

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://nipisod.ru/strik?utm_term=que+significa+lirios+en+la+biblia PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4488555/normal_60263c217abca.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468819/normal_6019791fd17f1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466368/normal_60418508e43b9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450721/normal_604d7e5dab886.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374963/normal_604fb1c1dfc5f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467601/normal_6050d6327e6e9.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/lezopobigeza/2980633374.pdfIn PDF document text
    • https://s3.amazonaws.com/xisefowu/jaderejixikej.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9d82e258-f91d-4a82-940f-f7531db7db28/8771960421.pdfIn PDF document text
    • https://s3.amazonaws.com/diwitapezu/dusutuninofexiwu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/806f2d07-6242-4523-969a-44317318dc85/cdigo_civil_2020_puerto_rico.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a366db06-7f11-4619-a68c-58e428d074c6/pesidovopatubawuropar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/abe1f6c0-e538-486f-a82f-bbf4120fca0d/tepepagolulamori.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e7e7666-6c97-4d5a-9a03-17ed93b30ad8/13766404498.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5e65f2bb-a4a4-41c2-a3f2-a61aa81204a7/bonapilunurugotopolirow.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cf0291fd-0d40-405a-a2e4-90b587fb1245/can_you_make_a_bunk_bed_into_a_loft_bed.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bdd30c76-d989-4c20-a9ee-59e9aad17b33/progresiones_geometricas_ejercicios.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/905077c3-41fe-4a9a-a116-fb0ec47c21d3/neato_vacuum_d7_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c7c84c81-36fa-4ff9-9f4f-31ad67030bf3/craftsman_8_inch_drill_press_chuck_removal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8db97e43-933e-4e1a-9e60-d16d6684ee81/sawepu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1ba0dec7-4cdb-4956-9f98-1063fde80f56/divine_mercy_catholic_church_north_courtenay_parkway_merritt_island_fl.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_off0001b907.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B907 5252 bytes
SHA-256: 02d210bebfdff824dbc6a76f1655a9e4d7901c1810c84e6962c5f8150b802d13
font_01_sfnt_off0001cafc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1CAFC 12744 bytes
SHA-256: 18d870866a57310c27a06b6c8d088b25cfc9cdee8d0f7fa081e8e39717c70ce7

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