Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f062a1410801bff…

MALICIOUS

PDF

74.3 KB Created: 2021-02-10 20:42:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 52ef14d96cd17dcc2b2bd8452838024e SHA-1: a6470a2280474a18d6637cdbde10874685a64542 SHA-256: 4f062a1410801bffdb90f29c04af9e5a142d9ef009367d6e3ba4ec9d37be031d
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with heuristics indicating the presence of external URIs. The document body, though heavily obfuscated, contains text suggesting it is a PDF. The primary malicious indicator is the embedded URL pointing to a suspicious domain, likely used to host a phishing page or a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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/aws?utm_term=yeast+adalah+pdf PDF link annotation
    • http://damvglaz0.xyz/mexico_en_llamas_el_legado_de_calderonfl993.pdfIn PDF document text
    • http://kneeksi.ru/base_de_datos_sql_server_2020xn45s.pdfIn PDF document text
    • http://funomixukipiv.iblogger.org/46258074343.pdfIn PDF document text
    • http://mmmmmme.space/occupational_health_and_safety_management_system_templatepqyzz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bixobetagosap.epizy.com/55461499826.pdfIn PDF document text
    • https://s3.amazonaws.com/ribowexulo/gaxowipiwo.pdfIn PDF document text
    • https://s3.amazonaws.com/numegubowalonan/android_remove_google_assistant_from_home_screen.pdfIn PDF document text
    • https://s3.amazonaws.com/xopugup/35481768044.pdfIn PDF document text
    • https://s3.amazonaws.com/donukadizolin/72907712081.pdfIn PDF document text
    • https://s3.amazonaws.com/sajezife/animation_movies_english_free.pdfIn PDF document text
    • http://lobosenus.epizy.com/musakalovefadironebezax.pdfIn PDF document text
    • https://s3.amazonaws.com/jakujakula/jijofomanajafef.pdfIn PDF document text
    • https://s3.amazonaws.com/lanubili/ralalebasimik.pdfIn PDF document text
    • http://todojenosefotaz.epizy.com/bollywood_movie_website_top_10.pdfIn PDF document text
    • http://poradenojipedu.rf.gd/alcoholic_hu_song_mr_jatt.pdfIn PDF document text
    • https://s3.amazonaws.com/wifiduxezo/68345590260.pdfIn PDF document text
    • https://s3.amazonaws.com/numunenoji/97942348545.pdfIn PDF document text
    • https://s3.amazonaws.com/wajufifenoxuj/html_dropdown_menu_template.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_off0000e86e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE86E 4992 bytes
SHA-256: 01a8263c179df112a0f0f5c8afaeed43a555e3bb75c71383872fcb0f986dbfa5
font_01_sfnt_off0000f969.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF969 10240 bytes
SHA-256: 4637be0c5d6515945f83119fcf56c52ae6fa7d9fd365d011f81bc70c29e97c00

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