Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7cc974e0b73751d…

MALICIOUS

PDF

72.0 KB Created: 2021-04-28 08:35:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 16d4bb19111d9152dc74148253043d43 SHA-1: afb188330562c163bbc6f2d2ffca5d5d705fe0c3 SHA-256: c7cc974e0b73751d0d2ab76ec37382276a01b74f8e375e50283dd070b5ea38b9
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It contains an embedded URL pointing to a suspicious domain, likely intended to redirect the user to a phishing site. The document body is heavily obfuscated, but the presence of external URIs and the overall detection suggest a phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://pelibifir.ru/strik?utm_term=sierra+reloading+6th+edition
    • https://xedutorapul.weebly.com/uploads/1/3/0/8/130813372/rerurobowugi.pdf
    • http://pirojibanenuzi.getenjoyment.net/planilla_banesco_apertura_de_cuenta.pdf
    • https://mamufitixiru.weebly.com/uploads/1/3/4/6/134640278/rugudut_letisu_duziz.pdf
    • https://zoximubovug.weebly.com/uploads/1/3/1/3/131379564/6687365.pdf
    • https://kajubuti.weebly.com/uploads/1/3/2/6/132680994/juduf.pdf
    • http://zeludupixejufi.medianewsonline.com/fake_college_acceptance_letter.pdf
    • http://dotenipago.medianewsonline.com/kixisalite.pdf
    • https://nubeboganiroj.weebly.com/uploads/1/3/1/3/131384383/9074847.pdf
    • http://keruluzo.medianewsonline.com/embankment_dam_design.pdf
    • http://dunodipike.sportsontheweb.net/que_es_la_temperatura_corporal.pdf
    • http://gimatadokij.mygamesonline.org/76091219828.pdf
    • https://pesulomerusetus.weebly.com/uploads/1/3/4/1/134109359/53ff4c.pdf
    • http://luxisulejoxo.getenjoyment.net/51562959264.pdf
    • https://vuzabevewipa.weebly.com/uploads/1/3/6/0/136087677/e0cc1e2719fa.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/fizup/9691637408.pdf
    • https://uploads.strikinglycdn.com/files/82ff48c6-282d-4b27-9c55-a08fe36c1d8b/hasfit_sitting_exercises_for_seniors.pdf
    • https://uploads.strikinglycdn.com/files/f5e72e34-5cee-4e27-bc4b-2f073429392c/53023847572.pdf
    • https://uploads.strikinglycdn.com/files/e9baac9a-682b-473f-83ec-b3a9166ed868/are_online_mbti_tests_accurate.pdf
    • https://s3.amazonaws.com/minabiwa/16775111901.pdf
    • https://uploads.strikinglycdn.com/files/3d94e5f8-abc9-4dbc-9198-7e012bb86450/whats_a_module_in_education.pdf
    • http://medexode.atwebpages.com/8294667108.pdf
    • https://s3.amazonaws.com/tonemakopinibem/75156812204.pdf
    • https://s3.amazonaws.com/faluzotixupi/1131919584.pdf
    • http://sajoveguduv.onlinewebshop.net/83935981346.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000da47.bin
5ecfc796bf48d66804f5048c136bb81377e61e36334a70d43aaf21134a0986a6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDA47 5164 bytes
font_01_sfnt_off0000ebc6.bin
ab4de336b933f8b10a5aa222c3cc628bacecc37c4199afca5c945e8dc904e835		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEBC6 10884 bytes

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