Malicious PDF — malware analysis report

Static analysis result for SHA-256 f657e5356f6ee013…

MALICIOUS

PDF

89.9 KB Created: 2021-04-01 15:51:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 828e0fcff84b015726d1165888b93dc9 SHA-1: 349a287a3604a6659d22be5728b596f0bd93701c SHA-256: f657e5356f6ee013a4c93213bc313e5f9314c9762b92864e87e4dde529394705
126 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 numerous embedded URLs, with one prominent URL pointing to 'xezojetit.ru', suggesting a phishing or malware distribution attempt. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the PDF is designed to host many links on disposable hosting, further supporting the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://xezojetit.ru/strik?utm_term=is+fl+studio+the+best PDF link annotation
    • http://gimexataga.iblogger.org/difusudamomoluvuzefubulef.pdfIn PDF document text
    • http://gisisavodure.22web.org/math_textbook_download.pdfIn PDF document text
    • https://guxikotazo.weebly.com/uploads/1/3/4/7/134704652/8522757.pdfIn PDF document text
    • http://zumedemuruva.22web.org/physical_therapy_exercises_for_carpal_tunnel_syndrome.pdfIn PDF document text
    • https://rodedewosesuge.weebly.com/uploads/1/3/6/0/136010241/55aff14.pdfIn PDF document text
    • https://foxaxefaga.weebly.com/uploads/1/3/1/3/131398491/5af519.pdfIn PDF document text
    • https://rovepegolotiru.weebly.com/uploads/1/3/4/3/134319415/lebab-sozemoxiwop-rofamiruf.pdfIn PDF document text
    • http://zenarajare.22web.org/fubetat.pdfIn PDF document text
    • https://xetuvamabur.weebly.com/uploads/1/3/1/4/131409037/31b95e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/b67ea89e-81cc-4d2a-a89a-3f1317a75f7c/43164770172.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/23119796-fd54-49f7-8d7c-b9f07ac914f1/husqvarna_61_price.pdfIn PDF document text
    • http://xokutamewa.rf.gd/pubapitigafiju.pdfIn PDF document text
    • http://badowivisoruk.rf.gd/36878084889.pdfIn PDF document text
    • http://biwonopo.epizy.com/fugalepu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c7ecaa51-1617-4225-896e-cf5e0fcc381c/27535285250.pdfIn PDF document text
    • https://2eb5e741-fe40-4e13-9a70-20af0821b154.filesusr.com/ugd/6cf56c_a958304c3e5c4ed2b1143d39cecbf3ca.pdf?index=trueIn PDF document text
    • https://76ed6b59-b034-43ac-b949-e1c08f76e3cb.filesusr.com/ugd/ee6100_032745aaff014094a8fcf3687a724d7a.pdf?index=trueIn PDF document text
    • http://fabevurubojob.epizy.com/49954288276.pdfIn PDF document text
    • http://kusamofezuz.rf.gd/31920577367.pdfIn PDF document text
    • http://xomufulikade.epizy.com/gaxepevubasakam.pdfIn PDF document text
    • https://507d1b22-ea03-4061-a262-f79425337ca2.filesusr.com/ugd/a374b9_724799eb9af844bd9cac2ad8265a8253.pdf?index=trueIn PDF document text
    • http://domusas.rf.gd/integral_calculus_maths.pdfIn PDF document text
    • http://lebikur.rf.gd/acetato_de_medroxiprogesterona_bula.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c1e3c60-7642-493b-9019-3c032e1e6e22/riwovatigedil.pdfIn PDF document text
    • https://34e223d5-b18a-4f89-96b3-7c58aa965d90.filesusr.com/ugd/440e29_e38221df6f1d4da3a1395366524f7296.pdf?index=trueIn 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_off0001243b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1243B 4768 bytes
SHA-256: 3603e7a079706fb52ba9f9ae2b3951313662a35503618454b08f564ae1ae89b0
font_01_sfnt_off00013469.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13469 11124 bytes
SHA-256: 02affdb10ab60a15794ee7c4541a8c2eed8def55d11ffa0979c8af09cc51c265

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