Malicious PDF — malware analysis report

Static analysis result for SHA-256 56e591ea0e9067c7…

MALICIOUS

PDF

75.3 KB Created: 2021-03-16 09:44:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 8d051efedcb4105144bc6bb7b0c205b7 SHA-1: 866eb0729ce03f67ba998796ba0ab961dfb9bdf6 SHA-256: 56e591ea0e9067c7b5ae2b6bb924c4678cef2647c5c1b57ab44477cd9be6a32c
126 Risk Score

Malware Insights

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

The PDF file contains heuristics indicating it is a link farm on disposable hosting, designed to redirect users. The embedded URL 'https://jumiwimov.ru/strik?utm_term=deadpool+1+comic+1997' is a primary indicator of malicious intent, likely serving as a lure for phishing or malware delivery. The ML classifier and ClamAV detection strongly support the malicious verdict.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://jumiwimov.ru/strik?utm_term=deadpool+1+comic+1997 PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4402721/normal_5fe4671f42fd3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424997/normal_6011857dd350b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387808/normal_5fe3bbd87f87a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476765/normal_60023ae7e0f2e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386605/normal_60470f862be8f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475863/normal_5fea1f4905e38.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459321/normal_6035f2d4ca55e.pdfIn PDF document text
    • https://cdn.sqhk.co/jutalufelex/haACOgc/72847226441.pdfIn PDF document text
    • https://cdn.sqhk.co/ganuniwiku/m7jnVie/73735953089.pdfIn PDF document text
    • https://cdn.sqhk.co/kokuxisa/ohggiif/49728712788.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501965/normal_5fe3e70f58661.pdfIn PDF document text
    • https://cdn.sqhk.co/fumodolanes/geGjfsX/kerojimatufe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386848/normal_604f2dd09e984.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
    • https://e8ceee85-86bf-4804-80ab-d7a1511cbcf5.filesusr.com/ugd/38650a_66f27540551442229be1799d0edd9785.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/173ce695-22b2-4362-b493-4ba80e096dd9/cen_tech_4_in_1_power_pack_reviews.pdfIn PDF document text
    • http://borovob.epizy.com/nagasivetilipux.pdfIn PDF document text
    • https://fa886832-b9e3-4ce5-a98c-97da2614721f.filesusr.com/ugd/9f8050_f7a4ba0cf7954b3c8f6f500e8e39d666.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/30ffede5-4f32-4b77-93d8-74ff1dde9313/60695930791.pdfIn PDF document text
    • https://665985ba-8e9f-4173-b993-17a3090d61d7.filesusr.com/ugd/08421c_1e96ba470ac0489c9e4206d9ff0419dd.pdf?index=trueIn PDF document text
    • http://fekobovovexi.epizy.com/esl_classroom_english_worksheet.pdfIn PDF document text
    • https://235be7ff-9b22-41de-91df-7a9e5ced5199.filesusr.com/ugd/4fa465_031b5aaa628d481386204b6df0871a04.pdf?index=trueIn PDF document text
    • https://d17f4099-ecc1-42b1-9c73-51521793457c.filesusr.com/ugd/4a2613_9debd10dfa3e4919af6859b9f292d34a.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/f2280797-f2ed-4d56-bc25-f2b63577337c/types_of_comparative_research_methods.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4f73301c-2760-4cbc-ab71-e77f164c449c/porque_es_importante_tener_una_buena_inteligencia_emocional.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9a707732-21af-4539-af17-51bca9c5c731/samsung_hw_j6500_soundbar_not_working.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_off0000ddf1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDF1 4832 bytes
SHA-256: edbbfabe0d3e4da573afc31126cf5ab8fda0d7d7f948346f749984dbe8c3d7b6
font_01_sfnt_off0000ee79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE79 10296 bytes
SHA-256: ed5ce1b84e1e92faca4423501c52029c8988e73f6fd676cb3bf1ac002567336b
font_02_sfnt_off000111b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111B2 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2