Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ddde7add729146e…

MALICIOUS

PDF

85.6 KB Created: 2021-03-24 16:09:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 489176013086f54ebe34903cc580173a SHA-1: 2b1d0855f94107ae7f83d748a999bce13d7e7766 SHA-256: 5ddde7add729146e9b359c4b451fdd114325abb0123002c2b3193f16a4bb3ded
96 Risk Score

Malware Insights

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

The sample is a PDF file flagged by ClamAV as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, which is likely intended to host malicious content or redirect the user to a phishing site. The ML classifier also strongly indicated maliciousness. No scripts were extracted, but the presence of the malicious URL suggests a phishing or credential harvesting attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://nipisod.ru/123?utm_term=attenuation+in+rectangular+waveguide
    • http://wewogokuwidu.mywebcommunity.org/72_king_kutter_finish_mower_parts.pdf
    • http://pofaduxiruk.getenjoyment.net/how_many_books_are_there_in_total_in_the_catholic_bible.pdf
    • http://bikejesoxatelo.mygamesonline.org/navukud.pdf
    • https://static.s123-cdn-static.com/uploads/4505839/normal_5fc909fa21f04.pdf
    • https://cdn-cms.f-static.net/uploads/4380882/normal_5fe85aacdd887.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/fuwawibu/compare_and_order_rational_numbers_practice_worksheet.pdf
    • https://s3.amazonaws.com/xomudufe/open_outlook_email_template_from_excel_vba.pdf
    • https://s3.amazonaws.com/fewunadupop/89171364209.pdf
    • https://s3.amazonaws.com/vatosolikijike/26046972328.pdf
    • https://s3.amazonaws.com/xiwevitox/gozekiwijigoduzomam.pdf
    • https://uploads.strikinglycdn.com/files/96f884c5-ad6a-4861-935c-c43d19c4248f/talking_as_fast_as_i_can_review.pdf
    • http://wulibazosuxib.onlinewebshop.net/72478280.pdf
    • https://uploads.strikinglycdn.com/files/e9d33f2f-5f38-41dd-9471-2c7d49e9d7c2/ginigizufataru.pdf
    • https://s3.amazonaws.com/vebenok/carol_cline_potty_training_in_3_days_free.pdf
    • https://s3.amazonaws.com/wazagidonux/amoeba_sisters_video_recap_ecological_relationships_answers.pdf
    • http://bufijonewufo.onlinewebshop.net/xuzerugulakafalodogapop.pdf
    • https://s3.amazonaws.com/sejakopa/how_to_open_crossfit_gym.pdf
    • http://gemovimuwopete.atwebpages.com/halo_books_in_order_2020.pdf
    • https://s3.amazonaws.com/jefazaxal/56156305428.pdf
    • https://s3.amazonaws.com/neporezofov/62373623131.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f4a0.bin
b6d796596534a07f2325f920fb9ce637f4b6475f3aa42c4c5ae6924eb1e4e9e2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF4A0 5072 bytes
font_01_sfnt_off00010603.bin
e7b4233a34672c430db18125055429419b40dd3c6064e54c438b4ae3f6d4f8d5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10603 13296 bytes
font_02_sfnt_off00013361.bin
d1ba22d41ca8af44c02ac7a4e071d5bdbd3832c6c382fa5789977db94d156abf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13361 16252 bytes

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