Malicious PDF — malware analysis report

Static analysis result for SHA-256 01409001f6247d65…

MALICIOUS

PDF

88.8 KB Created: 2021-03-03 14:40:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 15da9ffe7a9ed220c70a31b50c48b3f8 SHA-1: 9f91a886423fdeb0125ee390ce7e4d416f4db66d SHA-256: 01409001f6247d6531a139124f445e5d4c79e3251cf855a7a7a4ea153ff15377
184 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with several pointing to known malicious redirectors and disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing or trojan delivery mechanism. The document body, though heavily obfuscated, contains metadata suggesting it's a disguised file, likely intended to trick users into clicking the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://dafemum.ru/strik?utm_term=important+events+from+1800+to+1848 In PDF document text
    • https://cdn.sqhk.co/sapugelezuf/lihf9BV/apple_messages_app_for_windows.pdfIn PDF document text
    • http://rameautbxy.space/95758603456lretv.pdfIn PDF document text
    • http://javebamugizal.66ghz.com/chemische_formeln_lesen.pdfIn PDF document text
    • https://cdn.sqhk.co/rarukaboz/cQLSmfk/gajakosilobuvibufed.pdfIn PDF document text
    • http://arenaprobet.com/sufepaxadedubilunfdl1.pdfIn PDF document text
    • http://presalle.xyz/pathfinder_2e_rulebookoh0y8.pdfIn PDF document text
    • https://famepajovajegow.weebly.com/uploads/1/3/1/4/131438188/dinubutixugixo.pdfIn PDF document text
    • https://cdn.sqhk.co/xagaxubibiz/jjhR3gf/wordscapes_level_825.pdfIn PDF document text
    • https://nawopudupavipe.weebly.com/uploads/1/3/4/8/134856820/dbbdb.pdfIn PDF document text
    • https://cdn.sqhk.co/ruvajuvewuj/hh22dhj/21070951446.pdfIn PDF document text
    • https://cdn.sqhk.co/kekotenonaxu/ggMoyuB/battle_for_the_galaxy_hacked_version.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://todosix.epizy.com/nalamefuronilabotafu.pdfIn PDF document text
    • http://towidono.rf.gd/jacques_rancire_history_politics_aesthetics.pdfIn PDF document text
    • https://s3.amazonaws.com/gajabedafot/50409305205.pdfIn PDF document text
    • https://s3.amazonaws.com/zuguvoxoki/wezoz.pdfIn PDF document text
    • https://s3.amazonaws.com/suzixegazunow/journal_articles_on_leadership.pdfIn PDF document text
    • http://tutedenomazul.epizy.com/asthma_gina_guideline_2019.pdfIn PDF document text
    • http://pagupim.epizy.com/project_management_organizational_chart_template.pdfIn PDF document text
    • http://romipozaxijida.rf.gd/paypal_support_email.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE23 5488 bytes
SHA-256: 542cb2ff3eef1e761feef4258fed605cf96a4b675a6c7470f7c154985ac49b57
font_01_sfnt_off000100bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100BF 6812 bytes
SHA-256: 2279262c0feb3d9da5b32ad12cf8ae33ceef410b73c9dc82952f75b0c9d85c18
font_02_sfnt_off000117d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117D4 11732 bytes
SHA-256: 634ffd44b29a4306b041890cb674241b45b197c2e23e3dc61b98bf472d593675
font_03_sfnt_off00013f39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F39 16256 bytes
SHA-256: 3fc654e6c44e5b5ea7dd8abc44003e33fd6308e4012022e1519ba6150b39c93b

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