Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a7ae7622cb75ef9…

MALICIOUS

PDF

79.9 KB Created: 2021-03-08 21:39:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: e4004e2c365cc7393e9969eda51a243a SHA-1: b2570528fde06d8c1f639f059682f8977a011a36 SHA-256: 6a7ae7622cb75ef920af92f5518d5fc8d04f510e6d6be4df4576139db4ecdf21
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://lozipotod.ru/aws?utm_term=maytag+bravos+washer+parts PDF link annotation
    • https://cdn.sqhk.co/faruzikako/ieiahaF/mirror_lake_inn_spa_reviews.pdfIn PDF document text
    • https://cdn.sqhk.co/pemenodisoda/hhjRGFF/eazylene_topup_recharge_product.pdfIn PDF document text
    • http://jamotovoxut.mywebcommunity.org/doneke.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://a3c35cc3-4a3f-4d41-ab51-8b3e4b114d30.filesusr.com/ugd/2b25b5_d4993cc1dc04431a951922be900d7597.pdf?index=trueIn PDF document text
    • http://nebojemesiwi.atwebpages.com/all_circuit_symbols.pdfIn PDF document text
    • https://s3.amazonaws.com/gowupuzokowuxes/ielts_plus_2_reading_test_4_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/rekorewexidiwo/eruma_saani_videos_hd.pdfIn PDF document text
    • https://c6f55193-7475-4343-97dd-33cb3b141b6a.filesusr.com/ugd/808d8c_619abeaa10da4797b66f7efa057ad83e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xafaxotaful/vector_free_body_diagram_worksheet.pdfIn PDF document text
    • http://vikalasur.epizy.com/columbus_day_worksheets_grade_2.pdfIn PDF document text
    • https://s3.amazonaws.com/dogazisuze/irish_passport_photo_size_template.pdfIn PDF document text
    • http://wuniwivufe.rf.gd/82937779772.pdfIn PDF document text
    • https://ef2e072a-e8a2-4438-804d-cc750be2e2f6.filesusr.com/ugd/6a22cb_4cd5353529224bed8e2656be9c39ea9a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/padosumifubobo/weekdays_in_english_worksheets.pdfIn PDF document text
    • http://zikinevubebera.epizy.com/vexebanifazak.pdfIn PDF document text
    • http://koriwironawuva.myartsonline.com/xobudiwazi.pdfIn PDF document text
    • http://pejemevogoge.myartsonline.com/quiz_questions_on_environment.pdfIn PDF document text
    • https://s3.amazonaws.com/bojafazes/xazijisunef.pdfIn PDF document text
    • https://s3.amazonaws.com/mekonulegipero/jowubegatemiji.pdfIn PDF document text
    • http://danijikuguwidak.rf.gd/ethical_hacker_course_in_pune.pdfIn PDF document text
    • https://4f0754e2-f0c4-47db-826b-83042027646c.filesusr.com/ugd/7a11b0_87fe853601924170b71d2080041a7f89.pdf?index=trueIn PDF document text
    • http://xisapedugifado.epizy.com/21197276889.pdfIn PDF document text
    • https://a1359116-1358-4cde-afc5-3600b4bb50db.filesusr.com/ugd/3b0c81_111e48246eb648cd8025906ff4c53032.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000edce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDCE 5084 bytes
SHA-256: 54686a932dbc6544f9b79fe533018564a2c756e45b541d92e2f7a7a57e2bf099
font_01_sfnt_off0000ff49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF49 10840 bytes
SHA-256: 1609a7f04d0c1065bc00fec3b75cc98bdea68e52915b99d5a6fc508b44ab6ad5
font_02_sfnt_off000123ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123EF 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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