Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f13ba4c33cc95e2…

MALICIOUS

PDF

79.0 KB Created: 2021-04-01 08:39:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cda07b88330d1c1c626a5aa758d595fe SHA-1: bc42b79945ba0115166de1641d59bf4c62d1313f SHA-256: 9f13ba4c33cc95e28cdd8383536bc99baad455480d3462cda64297a1478e5b54
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URL, identified as malicious by heuristics and ClamAV. The document body, though heavily obfuscated, suggests a lure related to a 'bill nye atmosphere worksheet'. The presence of external URIs and the ML classifier's high confidence score indicate a malicious intent, likely to redirect the user to a phishing or malware distribution site.

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://maypoin.ru/wix?keyword=bill+nye+atmosphere+worksheet
    • http://pixunune.sportsontheweb.net/nesilodonap.pdf
    • http://nibofope.66ghz.com/zirafijoravukesuvowuziw.pdf
    • http://kiparegazeratax.getenjoyment.net/bosch_automotive_tools_bosch_obd_1050_mobile_smartphone_vehicle_diagnostics.pdf
    • https://cdn.sqhk.co/feduvefas/6jjjcgg/bowling_tips_for_cricket.pdf
    • http://mbfsopg.com/59623732182g0tq5.pdf
    • https://cdn.sqhk.co/jobiwokojo/fidhjjf/gwent_the_witcher_card_game_platinum_guide.pdf
    • https://cdn.sqhk.co/zamodozitip/idOJib9/lab_technician_interview_questions.pdf
    • https://cdn.sqhk.co/lekibapufe/geZgdih/ben_10_ultimate_wallpaper_hd_free_download.pdf
    • http://edaruzal.xyz/49604913414xk1pd.pdf
    • http://reduslim-shop.site/74761066635lckoi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/xovekolamoxe/how_sugar_changed_the_world_part_4.pdf
    • https://s3.amazonaws.com/ruzaganog/the_lake_house_2006_explained.pdf
    • https://s3.amazonaws.com/dobesogum/61685162195.pdf
    • https://s3.amazonaws.com/gulapore/formal_wear_hire_northern_beaches_sydney.pdf
    • http://vetizonudaxow.epizy.com/bollywood_war_movies_2019_hd_filmywap.pdf
    • https://s3.amazonaws.com/fejatepudopito/49320526554.pdf
    • http://mesipupip.rf.gd/sap_bpc_11.pdf
    • https://s3.amazonaws.com/vuliwisuwig/addition_and_subtraction_of_rational_numbers_worksheet.pdf
    • http://difedomuki.epizy.com/asme_bpe_2020.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f3a2.bin
8916dec862f121a9fb0221e5ed85ff77baa0936d591d51299adbb45fa2e939d0
pdf-font-stream PDF embedded font (sfnt) at offset 0xF3A2 5368 bytes
font_01_sfnt_off000105cc.bin
f72db1e2dcb3e6cff8e54b18bf75436d10a649ccfa7b8b21c42bd61ae6905d7d
pdf-font-stream PDF embedded font (sfnt) at offset 0x105CC 11696 bytes