Malicious PDF — malware analysis report

Static analysis result for SHA-256 96fbf31143b270e4…

MALICIOUS

PDF

74.6 KB Created: 2021-03-16 16:07:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 5197f6d95c7e0aee9ba7e56c6f67de3d SHA-1: 398d032c6704bdf136e8be97d9125f011ed4af91 SHA-256: 96fbf31143b270e4141306c58d9da5494e9b9f9a155d2e7b8b3324ea4046bf2a
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for Pdf.Phishing.Trojan, and an ML classifier indicating maliciousness. The document body, though heavily obfuscated, contains references to 'wkhtmltopdf' and a URL that suggests a download lure for 'itube studio apk'. The numerous embedded URLs, many pointing to disposable domains, further support a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://soxebez.ru/wix?keyword=download+itube+studio+apk PDF link annotation
    • http://kujunat.medianewsonline.com/obstacle_avoiding_robot_using_arduino.pdfIn PDF document text
    • http://jisijopimif.66ghz.com/psd_background_photoshop.pdfIn PDF document text
    • http://kipegujodup.getenjoyment.net/6243031024.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471691/normal_5ff762786cc08.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444885/normal_5ff5c48e90299.pdfIn PDF document text
    • http://rawoxaxevog.mygamesonline.org/jitewuronuwojekiluxuwaw.pdfIn PDF document text
    • https://cdn.sqhk.co/bezakebijuk/gjgcTZ8/ditepafenupefazejitavasat.pdfIn PDF document text
    • https://cdn.sqhk.co/zikonidenijo/ihlphja/ludovico_einaudi_divenire_download.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4456372/normal_5fe438c52b4a0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376619/normal_5ff9ee91aa75c.pdfIn PDF document text
    • http://tuxoseve.22web.org/effective_communication_skills_for_teachers.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444374/normal_602199f5995d7.pdfIn PDF document text
    • http://xolokukifimiv.sportsontheweb.net/jikarasuzumoneluv.pdfIn PDF document text
    • https://cdn.sqhk.co/ruzaxube/djhJhj4/fojomopof.pdfIn PDF document text
    • http://pazadixokumox.sportsontheweb.net/iomega_ix2-200_default_username_and_password.pdfIn PDF document text
    • http://walolexokesufa.sportsontheweb.net/applebee_s_carside_to_go_menu.pdfIn PDF document text
    • https://cdn.sqhk.co/kovixileta/hi6iagd/32622239593.pdfIn PDF document text
    • http://befotuke.mywebcommunity.org/what_is_a_high_conception_rate.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sigamit.epizy.com/sample_answer_to_complaint_with_affirmative_defenses.pdfIn PDF document text
    • http://riwexakax.epizy.com/depotiviziwerivawikupiwu.pdfIn PDF document text
    • http://rodedewezijore.atwebpages.com/repulomaxajeraguvekoputaw.pdfIn PDF document text
    • http://mutidulofof.epizy.com/53402601018.pdfIn PDF document text
    • http://xitevesapa.epizy.com/fundamentals_of_nursing_wilkinson_study_guide.pdfIn PDF document text
    • http://ladisopezaxak.epizy.com/cdff_app_free.pdfIn PDF document text
    • http://josesomesube.myartsonline.com/babufisakerirowudix.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_off0000e7a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7A4 5152 bytes
SHA-256: d0dbe77ef8758fb5a5a3b78576bb5e432cbd628709e97060c97523d266992088
font_01_sfnt_off0000f954.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF954 10484 bytes
SHA-256: aa2977bb47604533e355686fda640cd783dc7680b7744614849384dcbd87aa3d

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