Malicious PDF — malware analysis report

Static analysis result for SHA-256 63c7631405303dec…

MALICIOUS

PDF

74.9 KB Created: 2021-01-20 23:06:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 19d21ea89eece48f9ff5cfeab8b02a1b SHA-1: cde0f2b7cd75100c65f9582bee5544fd2a1fcc6d SHA-256: 63c7631405303dec89206fa35da6ed6e3b81b79822b94148067f75592b7ca2ef
184 Risk Score

Malware Insights

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

The PDF file contains multiple embedded URLs, with at least one identified as a malicious redirector. The document body, though heavily obfuscated, appears to contain text related to 'Frieza power level all forms', likely a lure to entice clicks on the malicious links. The presence of PDF_MALICIOUS_REDIRECTOR_LINK and ML_NYX_PDF_MALICIOUS heuristics strongly indicates a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://gettraff.ru/123?utm_term=frieza+power+level+all+forms In PDF document text
    • http://xexisutufas.iblogger.org/kirodenoretozawurima.pdfIn PDF document text
    • https://cdn.sqhk.co/joziroluxu/7Riajgh/dining_room_table_chairs_for_sale_cape_town.pdfIn PDF document text
    • https://cdn.sqhk.co/roretuduva/jaPjKha/lebara_sim_card_activation_uk.pdfIn PDF document text
    • https://cdn.sqhk.co/bivatesiromu/f263gcs/war_tamil_movie_bgm_ringtone_download.pdfIn PDF document text
    • https://cdn.sqhk.co/purorelaz/jjgiIie/wawebodijowegiw.pdfIn PDF document text
    • https://cdn.sqhk.co/bitaxukezor/jaCCY4I/best_white_sandwich_bread_recipe_bread_machine.pdfIn PDF document text
    • http://nimened.66ghz.com/vokimikod.pdfIn PDF document text
    • http://torevifij.iblogger.org/migotus.pdfIn PDF document text
    • https://cdn.sqhk.co/sabiwizi/ghcyjcI/auto_followers_for_instagram_app_download.pdfIn PDF document text
    • http://bofinaposo.iblogger.org/unless_exercises_worksheet.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://robinovedibepo.epizy.com/19917590273.pdfIn PDF document text
    • https://s3.amazonaws.com/bupijila/59332824334.pdfIn PDF document text
    • https://s3.amazonaws.com/zamemigojat/bakezifudoxogok.pdfIn PDF document text
    • http://kalogoraretupo.epizy.com/95343583989.pdfIn PDF document text
    • http://jazupizewatabal.epizy.com/31194422990.pdfIn PDF document text
    • https://s3.amazonaws.com/fotojipifuzitul/uniform_crime_reporting_handbook_2017.pdfIn PDF document text
    • https://s3.amazonaws.com/tiduro/55008805490.pdfIn PDF document text
    • http://delixerilebuk.epizy.com/nisodunomufikezutimil.pdfIn PDF document text
    • http://rawarawoxegig.epizy.com/mappa_agrigento.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dbaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBAA 3348 bytes
SHA-256: 76728d2dfea28dd7cd127dd6e6f56ea91f7b9686fb3ce1ca4aa026c4a8a5f8e4
font_01_sfnt_off0000e797.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE797 5204 bytes
SHA-256: 1d3611f12d42b5119627744daaa7f15e2a5745241724d8df026c86ca29c0b21e
font_02_sfnt_off0000f95a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF95A 10944 bytes
SHA-256: 09085e6b25c7017eea69df0618f61fee8ca940a9cf4e1c2ef92684a7d9adacb5

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