Malicious PDF — malware analysis report

Static analysis result for SHA-256 9dc33cffe1ec6711…

MALICIOUS

PDF

75.8 KB Created: 2021-03-05 10:32:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: a5e13916bb4f808288e0352c55b28bba SHA-1: 127ed69db1df6af184f2cf9a1c9174cc5f872eda SHA-256: 9dc33cffe1ec67112c0d6f48bed79ac849feb7cbc03b137f189e4085d7ee031d
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to disposable domains, indicating a link farm designed to redirect users to potentially malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with techniques used to deliver second-stage payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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
  • 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/strik?utm_term=sharp+carousel+microwave+1100w+manual PDF link annotation
    • http://exampl1214.com/amazon_seller_customer_service_phone_number_ukkg9ye.pdfIn PDF document text
    • http://myluckybet.xyz/payday_2_infamy_leveling_guidetrd6f.pdfIn PDF document text
    • http://options.expert/georgia_wic_medical_documentation_form_2loj1i.pdfIn PDF document text
    • http://natural-shop.info/lamupebubisagrpje.pdfIn PDF document text
    • https://mujunuduxur.weebly.com/uploads/1/3/5/3/135327440/6943233.pdfIn PDF document text
    • http://milanbeach.fun/89672306904as8ge.pdfIn PDF document text
    • https://gadiziwit.weebly.com/uploads/1/3/1/4/131406086/mezipunitik.pdfIn PDF document text
    • http://reassurez-moi-fr.info/sadlier_vocabulary_workshop_level_b_answers_unit_4rgaox.pdfIn PDF document text
    • http://lassituda.online/13591243586ymvng.pdfIn PDF document text
    • http://4d-5d.com/33917345086qtz7.pdfIn PDF document text
    • http://dimozakebaba.scienceontheweb.net/ethical_hacking_degree_course_in_kerala.pdfIn PDF document text
    • https://logutidukikov.weebly.com/uploads/1/3/1/3/131380383/8460803.pdfIn PDF document text
    • https://cdn.sqhk.co/letonolomo/gjBSJge/choice_of_the_vampire.pdfIn PDF document text
    • https://cdn.sqhk.co/javijaxim/grihogh/usdgc_2020_schedule.pdfIn PDF document text
    • http://kogemotuju.getenjoyment.net/fuwewigudunefipebito.pdfIn PDF document text
    • http://xikupolabije.22web.org/piano_sheet_music_shallow_lady_gaga.pdfIn PDF document text
    • https://cdn.sqhk.co/rijizedot/QxUr7jh/pirisirirolamigabosivu.pdfIn PDF document text
    • http://kemytbok.xyz/27736023200nvfzy.pdfIn PDF document text
    • http://tipografiyav.moscow/86981164620fzzb5.pdfIn PDF document text
    • https://cdn.sqhk.co/satidaruxami/VcYjidZ/golf_clash_golden_shot_santa_ventura_medium.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rosajeku.myartsonline.com/sikiradupoxisobodojobowu.pdfIn PDF document text
    • http://panulanupujudun.epizy.com/11525470216.pdfIn PDF document text
    • http://rixibedi.onlinewebshop.net/madasesovaf.pdfIn PDF document text
    • http://gixarewujedel.atwebpages.com/what_is_the_order_of_twilight_books.pdfIn PDF document text
    • http://ruwevabebivis.epizy.com/39789972253.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_off0000eb53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB53 5624 bytes
SHA-256: a54ac5d8ffc0e30576981d798e8c491db8e2ce96286df7602816f36a24b75f3f
font_01_sfnt_off0000fe5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE5E 10216 bytes
SHA-256: 011c3a7a36dee4c2f5d9a9abc41f6d6292fcf6aea6aed7dc5890ba4398208655

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