Malicious PDF — malware analysis report

Static analysis result for SHA-256 5fb6807d60e6675e…

MALICIOUS

PDF

79.1 KB Created: 2021-04-01 01:05:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: e5148d3207b5417657ca13aea187aa34 SHA-1: 251118153ef6756c495492b566bbfcd4f03c990b SHA-256: 5fb6807d60e6675ea940804675f86a65604bec3082481765add0de60c8c6f7f2
126 Risk Score

Malware Insights

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

The PDF contains multiple external URIs, with one specifically pointing to a link farm on disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to malicious websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://dugedepap.ru/wix?keyword=an+introduction+to+management+science+15th+edition+solutions PDF link annotation
    • https://cdn.sqhk.co/dibitarebizu/xfijMkb/senatabegesotinojumodo.pdfIn PDF document text
    • https://cdn.sqhk.co/gozolijitow/eXy5OgW/dope_wallpapers_iphone_se.pdfIn PDF document text
    • https://bamesejoporafuv.weebly.com/uploads/1/3/4/2/134265360/5305477.pdfIn PDF document text
    • https://cdn.sqhk.co/disegivoji/eTibMhg/franchise_hockey_manager_6_online_league.pdfIn PDF document text
    • https://cdn.sqhk.co/wezufunin/bvHOXhe/photomath_app_download_for_iphone.pdfIn PDF document text
    • http://vulupexemuv.iblogger.org/34569460844.pdfIn PDF document text
    • https://nalokulomegeze.weebly.com/uploads/1/3/4/7/134758193/b5d9eded82729.pdfIn PDF document text
    • https://gasezojilatinoj.weebly.com/uploads/1/3/1/4/131455825/gobadigugugikavesigi.pdfIn PDF document text
    • http://xedowoduwonaf.iblogger.org/what_are_the_5_ethical_standards_rics.pdfIn PDF document text
    • https://vopesowe.weebly.com/uploads/1/3/4/6/134638419/fe51a0aae95ab6.pdfIn PDF document text
    • https://pizakatunif.weebly.com/uploads/1/3/1/8/131856177/tivulanibinifenukero.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bilonukipi.rf.gd/algorithm_for_all_sorting_techniques.pdfIn PDF document text
    • http://kuvuzoruzanawip.epizy.com/bunetabijekumatos.pdfIn PDF document text
    • http://sovizaz.epizy.com/supermarket_vocabulary_worksheets.pdfIn PDF document text
    • http://kepatuzazavew.epizy.com/excel_dashboard_templates.pdfIn PDF document text
    • http://kunaraxanoxun.epizy.com/what_grade_level_is_amelia_bedelia_chapter_books.pdfIn PDF document text
    • http://towojuwuzozuref.epizy.com/85002543377.pdfIn PDF document text
    • http://lokakowevokeb.epizy.com/assembler_tutorial_deutsch.pdfIn PDF document text
    • http://bojakufuxelev.epizy.com/zora_neale_hurston_their_eyes_were_watching_god_chapter_1.pdfIn PDF document text
    • http://melotaroluna.epizy.com/early_humans_worksheet.pdfIn PDF document text
    • http://mujedofagogi.epizy.com/night_in_the_woods_soundtrack_free.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_off0000f74f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF74F 5516 bytes
SHA-256: cc5a2eb773477911e3a06434865a261480b62c5c0592ea0f79f872d82ff4ce20
font_01_sfnt_off000109e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109E7 10860 bytes
SHA-256: c3c8f52f18efd72cf1051cb3228b3445c0da04192415b0819adc121cd17a96d1

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