Malicious PDF — malware analysis report

Static analysis result for SHA-256 45b44ee04c24c4cc…

MALICIOUS

PDF

87.6 KB Created: 2021-04-13 21:59:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 7f2dcad9b7f0095a27d789d6980c1479 SHA-1: 20edb57dab360ba2e58af68661d5848004c33cd8 SHA-256: 45b44ee04c24c4cc3cb4b1125ad6414dec233dc76433f31fbf2ca2f2a07abd05
184 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, indicating a phishing or malware distribution attempt. The document body, though heavily obfuscated, suggests a lure related to a book summary. The presence of numerous links to disposable hosting further supports the malicious intent, likely to obscure the final payload or phishing page.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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=resumen+de+los+personajes+de+100+a%25C3%25B1os+de+soledad In PDF document text
    • http://razvivatel.blog/dunugunafowugajerid9exte.pdfIn PDF document text
    • http://securespot.ru/how_to_make_cold_froth_nespressopud83.pdfIn PDF document text
    • http://iranianvc.com/fundamentals_of_thermodynamics_sonntag_8th_edition_solution_manualae6fs.pdfIn PDF document text
    • http://xovekofetovo.66ghz.com/sda_hymnal_lyrics.pdfIn PDF document text
    • http://nibelv.xyz/nesemirozotujffgl.pdfIn PDF document text
    • http://p-kavkaza.ru/automotive_electrical_repair_manual1v76v.pdfIn PDF document text
    • http://pestore.pro/xikukoluxejedafumotkbwm.pdfIn PDF document text
    • http://baugroup.info/abc_of_chairmanshipa7bdq.pdfIn PDF document text
    • http://vetobiz.sportsontheweb.net/mathematical_physics_lecture_notes.pdfIn PDF document text
    • https://cdn.sqhk.co/sigidezok/jje71ja/21514978288.pdfIn PDF document text
    • https://cdn.sqhk.co/rijunawep/T4jj5rG/nizalux.pdfIn PDF document text
    • http://xaxifibipebux.iblogger.org/subaru_ea190v_pressure_washer_parts_list.pdfIn PDF document text
    • http://fuxuvewaru.22web.org/brendan_behan_the_hostage.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://wubonaxe.epizy.com/40922921339.pdfIn PDF document text
    • http://pixafur.atwebpages.com/star_wars_the_essential_reader_s_companion_download.pdfIn PDF document text
    • http://lokakowevokeb.epizy.com/cadsofttools_dwg.pdfIn PDF document text
    • http://munakazoxan.epizy.com/high_court_clerk_exam_questions_and_answers.pdfIn PDF document text
    • http://vukigopi.rf.gd/linux_kernel_code_style_guide.pdfIn PDF document text
    • http://zirofasorajama.epizy.com/blue_valley_school_district_calendar.pdfIn PDF document text
    • http://movuzawizigevej.myartsonline.com/62055953393.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_off00010b32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B32 5348 bytes
SHA-256: 4cc06a0072a2c442d6647f1b15a696cf068142ce90770be4509eb0ce0d28c8b4
font_01_sfnt_off00011d06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D06 10848 bytes
SHA-256: 37cf40b65915f07533f2dc7ea769e153c5eacfb9647d44c1f17354ddbecc945c
font_02_sfnt_off00014040.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14040 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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