Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a7b04867d9e7643…

MALICIOUS

PDF

74.7 KB Created: 2021-04-06 22:00:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 67c6a87357e38883b593c8a716b29429 SHA-1: 21a32c572862c05ebf4e41296eabb01cb308ccc1 SHA-256: 6a7b04867d9e76433a2b35ff3e2bd4604e1e4f35e3949a6b558b151f56c3becc
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The ML classifier also strongly flagged this PDF as malicious. The embedded URL is likely intended to lead the user to a phishing or malware download site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://yafferge.ru/wb?keyword=are%20ice%20breaker%20mints%20sugar%20free In PDF document text
    • http://fodefon.getenjoyment.net/52790383234.pdfIn PDF document text
    • http://uspex22.online/bojonepux0vv43.pdfIn PDF document text
    • http://sevowina.medianewsonline.com/3dplm_aptitude_questions_2020.pdfIn PDF document text
    • http://grusha.space/persia_bt_fuente_prncipe_de_descargg2kmh.pdfIn PDF document text
    • http://bluebadgeapproval.com/win_the_lottery_method_reviews7eeq5.pdfIn PDF document text
    • http://nakodinita.scienceontheweb.net/types_of_anemia_list.pdfIn PDF document text
    • http://daludaja.getenjoyment.net/how_to_insert_diaper_genie_refill.pdfIn PDF document text
    • http://dekoriribazovax.mywebcommunity.org/difference_between_sdgs_and_mdgs.pdfIn PDF document text
    • http://xufuxenu.mypressonline.com/introductory_mathematical_analysis_for_business_economics_and_social_sciences.pdfIn PDF document text
    • http://safijejog.mygamesonline.org/64236414399.pdfIn PDF document text
    • http://kevufeduwatawos.mypressonline.com/merge_files_into_one_online.pdfIn PDF document text
    • http://onlinetiser.website/chinese_card_game_three_kingdomsbel0t.pdfIn PDF document text
    • http://xruhdfo.site/jtm_fit_the_functional_methodrbq28.pdfIn PDF document text
    • http://bumasujofoj.getenjoyment.net/how_to_make_your_own_homemade_face_mask.pdfIn PDF document text
    • http://woronari.getenjoyment.net/beyond_good_and_evil_archive.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/dutimajizowa/vudanuvevaxikufukasojimu.pdfIn PDF document text
    • https://s3.amazonaws.com/fajeloninesitel/ximubizujelo.pdfIn PDF document text
    • http://nojikigor.myartsonline.com/capteur__effet_hall_principe.pdfIn PDF document text
    • https://s3.amazonaws.com/kotodur/witujaperefevenoxebujib.pdfIn PDF document text
    • http://lumalidik.atwebpages.com/tecnica_quirurgica_de_aneurisma_de_aorta_abdominal.pdfIn PDF document text
    • https://s3.amazonaws.com/fedure/niburizufilok.pdfIn PDF document text
    • http://givetupazowo.onlinewebshop.net/inject_malicious_code_in.pdfIn PDF document text
    • https://s3.amazonaws.com/wokesabisevo/29047282521.pdfIn PDF document text
    • http://bibezakomi.myartsonline.com/nefidivozubepewutan.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_off0000e456.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE456 5360 bytes
SHA-256: 869c0823395aa5c60d11be7afdccf25d564ebf396aeeb79bfc0b20afd2b0b5a6
font_01_sfnt_off0000f688.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF688 11376 bytes
SHA-256: 9153d4e5aaaedeacab1a731a25592cd4e6660d6520cb2b5529af1be0ebb4e99a

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