Malicious PDF — malware analysis report

Static analysis result for SHA-256 89a499404fc2a690…

MALICIOUS

PDF

81.0 KB Created: 2021-03-17 19:17:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 9544beaba7e3231408111f43cc12ead2 SHA-1: b458a2a55ba9f002c989991deb3c587437b83018 SHA-256: 89a499404fc2a690e57a6d61f3fe7dfffa20c7d712884109f75ee4321be5036e
96 Risk Score

Malware Insights

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

The PDF document contains embedded URLs that lead to other PDF files, suggesting a phishing or malware distribution scheme. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or trojan delivery. Although no scripts were explicitly extracted, the presence of external URIs and the overall detection profile point towards a malicious document designed to trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://jottigo.ru/123?utm_term=irca+lead+auditor+exam+questions+and+answers PDF link annotation
    • http://usersdeviceprotectionservice.site/zexedufajupexeterenabisavz7epa.pdfIn PDF document text
    • http://liwitesuzemumex.sportsontheweb.net/bodyweight_bodybuilding.pdfIn PDF document text
    • https://cdn.sqhk.co/lajawawinu/SiijcRn/xajerekiwajaveru.pdfIn PDF document text
    • http://fazejajogavu.medianewsonline.com/epfo_ssa_result_2020.pdfIn PDF document text
    • https://fupiledur.weebly.com/uploads/1/3/4/5/134527701/4676885.pdfIn PDF document text
    • https://sunudufexune.weebly.com/uploads/1/3/0/8/130874439/3021326.pdfIn PDF document text
    • http://nonly.xyz/keystone_f89_datasheetr53kp.pdfIn PDF document text
    • https://cdn.sqhk.co/jesovolavig/isji0ha/learn_to_play_songs_on_piano_youtube.pdfIn PDF document text
    • http://meetsol.xyz/kemirul17okt.pdfIn PDF document text
    • https://cdn.sqhk.co/lojenozasila/b6mih9U/bibibivazegafivuduw.pdfIn PDF document text
    • https://finirawex.weebly.com/uploads/1/3/2/7/132741073/kunup.pdfIn PDF document text
    • https://wuluvaxezipow.weebly.com/uploads/1/3/5/3/135393263/3632f7fff8ab.pdfIn PDF document text
    • http://uber-global.com/business_analytics_jobs_entry_levelmzayo.pdfIn PDF document text
    • https://cdn.sqhk.co/wesaduleb/zhhEjg2/fulob.pdfIn PDF document text
    • http://thedopemarketing.com/265238956126yqdb.pdfIn PDF document text
    • https://cdn.sqhk.co/goxobuve/Xu80hbb/my_city_airport_timetable.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/tumuzu/tisomeraradezezu.pdfIn PDF document text
    • https://s3.amazonaws.com/telasebisu/torch_browser_for_windows_free.pdfIn PDF document text
    • http://zikoliduxa.atwebpages.com/12776812952.pdfIn PDF document text
    • http://sabixukavizom.myartsonline.com/verumokuvusegixodiloxer.pdfIn PDF document text
    • https://s3.amazonaws.com/pisik/bookmark_psd_free.pdfIn PDF document text
    • https://s3.amazonaws.com/sojaxub/are_the_stranger_things_books_canon.pdfIn PDF document text
    • http://nuwadolonopip.onlinewebshop.net/baixar_livro_esposa_ou_amante.pdfIn PDF document text
    • https://s3.amazonaws.com/sixolose/simple_powerpoint_template_free.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ef6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF6E 5188 bytes
SHA-256: 00403391f1551a43c067217fecc8e269ec1ecdc98acca6bf8d9b1161936a3724
font_01_sfnt_off000100f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100F7 11424 bytes
SHA-256: a71d5df8a54ee8e859e7757e4fc3df325553577dd0e963ad485a9a440f6bb357
font_02_sfnt_off00012794.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12794 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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