Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb56c3acf3a119c4…

MALICIOUS

PDF

76.2 KB Created: 2021-04-24 08:03:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 043aa63d296388eed86ddc62dc9da5c8 SHA-1: 786142f055e6af71b615075f7b6ef57fdfef840c SHA-256: fb56c3acf3a119c469a80cfd1a1e64b6d5fc797b3089a50628090b9011269e1b
184 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs pointing to known malicious redirectors and disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were directly extracted, the PDF structure and embedded links are indicative of a malicious document designed to redirect users to harmful sites.

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
  • 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://yafferge.ru/strik?utm_term=arduino+for+beginners+ppt In PDF document text
    • http://sebevifa.getenjoyment.net/principles_of_physics_11th_solution.pdfIn PDF document text
    • http://everydayy.fun/49791807357go152.pdfIn PDF document text
    • http://arnautmebel.ru/child_care_benefit_formqitzr.pdfIn PDF document text
    • https://cdn.sqhk.co/dizukenepu/Xjaiihj/julepises.pdfIn PDF document text
    • https://cdn.sqhk.co/puvubuzu/fgi3fB0/princess_salon_2_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/letijefa/hevgiyy/bed_wars_mod_apk_happymod.pdfIn PDF document text
    • http://ukranews.icu/can_a_civilian_get_special_forces_traininghfd1u.pdfIn PDF document text
    • http://fafesixokegigi.getenjoyment.net/94988916738.pdfIn PDF document text
    • http://sufixek.22web.org/vawarudubebatakiratowi.pdfIn PDF document text
    • http://copyrighthelpptteam.com/33354340664zo6rh.pdfIn PDF document text
    • http://xebubux.sportsontheweb.net/31865854739.pdfIn PDF document text
    • http://kanaxade.mygamesonline.org/67507185617.pdfIn PDF document text
    • https://cdn.sqhk.co/xogodapap/hdgc1ii/zoxefeparebolino.pdfIn PDF document text
    • http://healthyforczechrepublic.site/gitasazebipojo2ppwm.pdfIn PDF document text
    • http://muzibatixabu.mypressonline.com/69932442690.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://rosajeku.myartsonline.com/rapibovowoxu.pdfIn PDF document text
    • http://wejufutaz.onlinewebshop.net/earthworks_brian_aldiss.pdfIn PDF document text
    • https://e20d271a-53e3-41f9-9180-d6cd5f9fd148.filesusr.com/ugd/6cfc61_41ac2e00f8ba4300a84a1fe922a66815.pdf?index=trueIn PDF document text
    • https://5663e088-3595-439c-971a-5873693bee35.filesusr.com/ugd/e98895_33f05de2d68c478c93bf1b6d07908360.pdf?index=trueIn PDF document text
    • http://nejoselox.epizy.com/arsne_lupin_gentleman_cambrioleur.pdfIn PDF document text
    • https://76bf42c0-7447-45ed-8dd3-33f9786ae3ae.filesusr.com/ugd/ba2c19_b7eef0d5723847f78d51450ae236bc03.pdf?index=trueIn PDF document text
    • https://981168d4-05fc-44b6-871d-73371d7e8cf1.filesusr.com/ugd/87d215_23e8ce452c694fcf9fab1f076254e155.pdf?index=trueIn PDF document text
    • http://puribisipup.atwebpages.com/the_astral_projection_guidebook_erin_pavlina_download.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_off0000e04e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE04E 4980 bytes
SHA-256: 7e0b396d1f8eeec04005531105fe688a19aa2915ee24850bf7be6f89fb02bb3d
font_01_sfnt_off0000f146.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF146 10656 bytes
SHA-256: a1529cb04753d560f278cdcc79167d8559c1c933914ac7f4dde86c81a5e84678
font_02_sfnt_off00011586.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11586 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361