Malicious PDF — malware analysis report

Static analysis result for SHA-256 a54442f2fb5bbf0e…

MALICIOUS

PDF

75.9 KB Created: 2021-04-01 00:56:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 424ad804a53ea98ce769c46a98aea601 SHA-1: f4a52bf065ac71c2006864b1e5291e988a9da678 SHA-256: a54442f2fb5bbf0ef252d8a8210ab92861410c743ccc94ce8afd61bd0cc00b0f
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains an embedded URI pointing to a suspicious domain, which is likely used to deliver a malicious payload or conduct phishing. The document body, though heavily obfuscated, suggests a lure related to learning or a guide, consistent with social engineering tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://druttle.ru/wix?keyword=learn+to+fly+2+the+easy+way PDF link annotation
    • http://excellent-spb.ru/sheet_metal_bending_machine_wikipediapvk71.pdfIn PDF document text
    • http://wwbook.org/dopamufanuwovudofbp7y7.pdfIn PDF document text
    • http://eslivdrug.space/trinomio_cuadrado_perfecto_ejercicios_resueltoszeg4a.pdfIn PDF document text
    • http://bbcua.site/react_native_android_gradle_cleanb1op8.pdfIn PDF document text
    • http://fullpisetc.ru/zenilevegiraj6jbjz.pdfIn PDF document text
    • http://2220202.ru/bhoot_wala_game_karna_haifhmri.pdfIn PDF document text
    • https://cdn.sqhk.co/mekaxosur/wsigZji/lexia_core5_reading.pdfIn PDF document text
    • http://dekupedatibidal.iblogger.org/amoled_burn-_in_fixer_android.pdfIn PDF document text
    • http://lnstagramverifiedbadge-media.com/addition_et_soustraction_des_nombres2poie.pdfIn PDF document text
    • http://uscreditmonitoring.info/alwida_mahe_ramzan_whatsapp_status_freejyn73.pdfIn PDF document text
    • https://cdn.sqhk.co/wugunifikezu/higgAic/965456109.pdfIn PDF document text
    • http://triple-doska5.club/zoxirajukirelad9hx46.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc3f2e2c-57d7-4c88-a728-05b27855adf2/mafada.pdfIn PDF document text
    • https://s3.amazonaws.com/remufuzu/79622244250.pdfIn PDF document text
    • https://s3.amazonaws.com/tamobalasu/47202888512.pdfIn PDF document text
    • https://s3.amazonaws.com/topipovikapari/zodokepisobuwurefarasab.pdfIn PDF document text
    • http://mevutaleb.epizy.com/jeopardy_alto_sax_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/xubifupi/is_audacity_good_for_youtube.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/855dea62-4bf1-4a86-9f19-9df73f7c2beb/personal_development_objectives_for_work_examples.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/96d94cf0-de56-46e5-b16e-d6a9811df3f3/butagogekur.pdfIn PDF document text
    • http://vopuxoke.epizy.com/how_do_you_factory_reset_a_motorola_android_phone.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_off0000eabc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEABC 5120 bytes
SHA-256: 664f48da5d2334a260555c37c25e19a952d7d07bd508338382e1394011a4c7a0
font_01_sfnt_off0000fc42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC42 11288 bytes
SHA-256: dffc725e016c558199d836da7ea3cafa7ed5aac9b461af9ceb307473235df83b

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