Malicious PDF — malware analysis report

Static analysis result for SHA-256 66d243f8fa7c9cc0…

MALICIOUS

PDF

77.4 KB Created: 2021-03-23 04:13:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: b6c781fe13628620bc221ea0d5e5e30b SHA-1: 1f382454458abad85c28cf22d4759245e7b69b29 SHA-256: 66d243f8fa7c9cc083dfc8b021ef2f974acdadf041303caab967403a5eeda911
96 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, likely intended to redirect the user to a malicious site. The document body, though heavily obfuscated, suggests a lure related to 'Barbara Cartland pdf gratis', aiming to trick users into clicking the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://soxebez.ru/award?keyword=barbara+cartland+pdf+gratis PDF link annotation
    • http://torchland.xyz/manual_de_router_tp-link_tl-wr841n_en_espaol14cmh.pdfIn PDF document text
    • http://uplrezina.site/dowunebidips8yb.pdfIn PDF document text
    • http://fakts.design/turodunegawuro5eq9s.pdfIn PDF document text
    • https://jelopujepifo.weebly.com/uploads/1/3/4/3/134341958/litomemumasimadimaxu.pdfIn PDF document text
    • https://xiluxobafuju.weebly.com/uploads/1/3/5/3/135323992/vinozaligivis.pdfIn PDF document text
    • http://gebuhrenfrei-mein.com/20802886494944sb.pdfIn PDF document text
    • http://gikodarekegov.mywebcommunity.org/tai_chi_exercises_for_beginners.pdfIn PDF document text
    • http://bcipreactivaperu.com/gawubizotorouk7vv.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/gateme/bi_weekly_report_sample.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1c8d240d-4283-4df0-a2fb-4e22fbbef67c/shure_sm58_pgx4_wireless_microphone.pdfIn PDF document text
    • https://s3.amazonaws.com/purixifusipelid/first_grade_language_arts_printable_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/didowugorokirug/indictment_charge_sheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b3c46ca-a8fb-49c6-af32-418fe64dd863/download_audio_driver_for_windows_7_ultimate_64-bit.pdfIn PDF document text
    • http://geforagegi.atwebpages.com/6_times_table_test_printable.pdfIn PDF document text
    • http://giworutiw.myartsonline.com/easy_piano_songs_for_beginners_with_letters_hindi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/573b1f25-a5d1-4bd3-b420-923e5abde767/husqvarna_emerald_118_sewing_machine_reviews.pdfIn PDF document text
    • http://bowegasobufur.myartsonline.com/contrastive_analysis_book.pdfIn PDF document text
    • https://s3.amazonaws.com/mixanaz/56494328875.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_off0000e330.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE330 5072 bytes
SHA-256: 14be3c734d7d62147d5d6f0a22196499e637487e1c0c275e8b8a4d0d5c4c9363
font_01_sfnt_off0000f470.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF470 11936 bytes
SHA-256: 14f40c5e275944b959d134df4d81fe279de2e369af1c7b327f604aaab1445212
font_02_sfnt_off00011a85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A85 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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