Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb38820797d49504…

MALICIOUS

PDF

80.4 KB Created: 2021-03-23 11:26:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 1e6726d715fedcdfe2ca6157193678da SHA-1: 033ac888144e88efab77a3b8b38c829475cc68cf SHA-256: bb38820797d49504715029aea29beec1a23056997da8ac217c6b34761af1254e
184 Risk Score

Malware Insights

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

The PDF contains multiple embedded links that are flagged as malicious redirectors. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, contains text that appears to be a lure, and the presence of numerous links to disposable hosting reinforces the phishing or malware distribution objective.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • 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://crophysi.ru/wix?keyword=a+love+to+last+may+17+2020 In PDF document text
    • http://characduwe.space/principios_de_administracion_financibct9a.pdfIn PDF document text
    • https://cdn.sqhk.co/gulanuwe/Thbjjjg/nafekawaxukedotej.pdfIn PDF document text
    • https://cdn.sqhk.co/fasisela/3jfhelF/five_star_agency_timesheet.pdfIn PDF document text
    • https://cdn.sqhk.co/naziwixolagu/ajb5gcL/fodabesoramiru.pdfIn PDF document text
    • http://rankingcoach-apps.com/android_version_9_wifi_callings5514.pdfIn PDF document text
    • http://matteset-spon.space/who_was_cains_wife_in_the_biblet411m.pdfIn PDF document text
    • https://cdn.sqhk.co/javeduner/hbl66ig/mancala_game_math_playground.pdfIn PDF document text
    • http://skidki-day.shop/227839176115z1f2.pdfIn PDF document text
    • http://reduslim-sito.site/lake_michigan_salmon_fishing_report_blogrn9f9.pdfIn PDF document text
    • http://pressit.fun/phantom_of_the_opera_think_of_me_lyrics_broadwayeoxjz.pdfIn PDF document text
    • http://closemaze.com/jujigazabugavavabisojohxwwo.pdfIn PDF document text
    • http://burrrhey.tech/english_grammar_tutorial_videos_free_downloadamdhw.pdfIn PDF document text
    • http://fruit-ital.space/learn_thai_massage_london13yl3.pdfIn PDF document text
    • http://migriruy.ru/basic_linux_networking_commandsj9lyt.pdfIn PDF document text
    • http://marafonsport.site/iso_9001_standard_operating_procedure_definitionjtqi4.pdfIn PDF document text
    • http://static-get.top/12936028499n5e3d.pdfIn PDF document text
    • http://indital.fun/drawing_ideas_easy_videosll3uk.pdfIn PDF document text
    • http://sexesex.site/dna_structure_review_worksheet5pie9.pdfIn PDF document text
    • http://genusttwsr.fun/riddex_pest_repeller_manualx6sla.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vojutomozab.epizy.com/wosixatepivemivujoxisadez.pdfIn PDF document text
    • http://kaxafedi.epizy.com/increase_a_number_by_a_percentage_worksheet.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fae0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAE0 5292 bytes
SHA-256: 6f915e0f791a4cee962412b5b8399788649db5620de49277e2f2bbe685b2c3b6
font_01_sfnt_off00010cec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CEC 11016 bytes
SHA-256: 389827e7e1319ccde7b57af87cf5334ac02e5fbeae878dfa167a02793a0dc56c

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