Malicious PDF — malware analysis report

Static analysis result for SHA-256 9eca3a977dd1997a…

MALICIOUS

PDF

76.2 KB Created: 2021-04-02 18:41:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: aa3ccc6fd86537ca9bec1b09529e7faf SHA-1: ad27ae2053d7f6d33ff8a6f4dc06361c6fc7a73f SHA-256: 9eca3a977dd1997a99411714918abb6941b2f82319adca2f4c32315fa7bfca12
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 domain associated with phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and the presence of an external URI suggest an attempt to redirect the user to a malicious site, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://vilenefex.ru/award?keyword=august+monthly+current+affairs+2020+pdf+gradeup PDF link annotation
    • http://carbackseat.site/dagukajuvibimuwifisilo5ed7b.pdfIn PDF document text
    • https://cdn.sqhk.co/zibepidok/haHggji/sideload_launcher_android_tv.pdfIn PDF document text
    • https://cdn.sqhk.co/lovojekaboxi/QIK0Fij/91490471080.pdfIn PDF document text
    • http://ladirojenovezoj.mygamesonline.org/zubesubabed.pdfIn PDF document text
    • http://biomaniks.website/jonajesedikomafovufofat0zgtn.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://suruliloxapesas.myartsonline.com/joxodesisitepavo.pdfIn PDF document text
    • https://s3.amazonaws.com/tobobowu/pimimesixin.pdfIn PDF document text
    • https://b9a4c3d6-4ccf-4d04-9b0f-c2e9c357e15d.filesusr.com/ugd/e5cbe5_d1d5bed302654bf887427c67fd39f29b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/waxapoz/unbelievable_netflix_imdb_parents_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/sojebelevenex/madusufozojivufepixev.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2afa72e1-0b11-4541-bd03-7855f51d88a9/alfreds_piano_101_book_1_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0100d98f-5cd7-49ca-9c59-93e4dbbb58bf/kapigikufeduwixex.pdfIn PDF document text
    • https://488c2ff9-9ff4-499e-8f11-525115e20b22.filesusr.com/ugd/8aba0c_e3499951cd4044caa110d103a8da000e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sinadi/basic_and_clinical_pharmacology_katzung__trevors_pharmacology_examination_and_board_review.pdfIn PDF document text
    • https://77701ba7-c5ad-4750-ab17-5b03548f7fc0.filesusr.com/ugd/9a242c_389329e1e48b4c778b575d05de72815b.pdf?index=trueIn PDF document text
    • http://judiserod.onlinewebshop.net/english_alphabet_esl.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a7bbfe5c-eaa6-43b8-a467-8255ed46f811/adding_fractions_with_like_denominators_anchor_chart.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_off0000e7cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7CD 5936 bytes
SHA-256: 2c10d981bebe5f1d302816b30ed1fc9b8edd7d66d47598738d5ee080af89b869
font_01_sfnt_off0000fbe7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBE7 11176 bytes
SHA-256: 87c964217dafcff46253cfd4119dcc58760ede836fc146a5c866c22023c7be2c

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