Malicious PDF — malware analysis report

Static analysis result for SHA-256 b4aa539bfa7ca825…

MALICIOUS

PDF

77.0 KB Created: 2021-04-01 02:13:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: f780015a2807a38c17b3b05795c4ab08 SHA-1: 8f4416218998e8e78c946c79c9ccb9fbbf0acf2c SHA-256: b4aa539bfa7ca8258159fe4f54b6ab971aee79c897f948965f12d47a32d6533d
96 Risk Score
Tags
free-cdn-ebook-manual-lure

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 external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://ponafet.ru/123?utm_term=ata+guidelines+for+solitary+thyroid+nodule PDF link annotation
    • http://towexiwi.sportsontheweb.net/tratamiento_de_candida_albicans_oral.pdfIn PDF document text
    • http://kutagugiponapa.22web.org/52699470737.pdfIn PDF document text
    • http://pokemonrivals.online/singular_and_plural_form_of_criteriaucecr.pdfIn PDF document text
    • http://goodsun.space/28307823452rn965.pdfIn PDF document text
    • http://hot-money.fun/zekiwedapezatamidulibufe9gyjx.pdfIn PDF document text
    • http://bofinaposo.iblogger.org/42359810788.pdfIn PDF document text
    • http://ductsunlimitedins.com/breaking_silence_book_seriesyl0zh.pdfIn PDF document text
    • http://nutetuxiv.mygamesonline.org/ecology_and_environment_textbook.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://punolubumima.epizy.com/5153100632.pdfIn PDF document text
    • http://rowesotinik.rf.gd/90507989190.pdfIn PDF document text
    • https://s3.amazonaws.com/bamepofewalada/egyptian_cotton_bath_sheet_sale.pdfIn PDF document text
    • http://damikofem.rf.gd/pubg_mobile_android_mod_menu.pdfIn PDF document text
    • http://lejonawazemu.rf.gd/carl_sagan_cosmos_download.pdfIn PDF document text
    • https://s3.amazonaws.com/jafujasiwetid/the_canterville_ghost_mrs_umney_character_sketch.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0bf736dd-e87d-4428-9b09-5758f9ab3d42/jepopo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec50cc8e-21aa-45f6-80a9-b85df7151045/how_long_does_it_take_to_be_a_secret_service_agent.pdfIn PDF document text
    • http://zumijuxuv.epizy.com/sikuvorekixuzajomuviwegu.pdfIn PDF document text
    • https://s3.amazonaws.com/bomifabipi/23183964383.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b743bea-d3f2-4fe0-a9fc-4d23f637d80a/60434608346.pdfIn PDF document text
    • https://s3.amazonaws.com/winumigutam/gre_analytical_writing_templates.pdfIn PDF document text
    • https://s3.amazonaws.com/zoromexemuzid/alliance_broadband_ip_connector.pdfIn PDF document text
    • http://nozekesarosale.rf.gd/39845946476.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_off0000ef1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF1E 5260 bytes
SHA-256: da6a45c9e1fe2869b8f260e16b693e8d878fefe6355f0b412c95429dd12586c6
font_01_sfnt_off00010105.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10105 11068 bytes
SHA-256: ed783f8acf71624125671e1ee2010606160dbbe552e38ded4d3b898a784710bf

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