Malicious PDF — malware analysis report

Static analysis result for SHA-256 e66efac2e35ed8dd…

MALICIOUS

PDF

74.8 KB Created: 2021-04-16 05:23:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e9e158897106b8a2676bcd5d7eb6e357 SHA-1: 529425695a7fe63efb6b527d137efbac1dbd7db0 SHA-256: e66efac2e35ed8dd958d1caacd347a4bf608cc46f53a4496fc467242107df2dd
156 Risk Score

Malware Insights

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

This PDF document contains a large number of external links, characteristic of a link farm, designed to direct users to malicious websites. The primary malicious URL identified is https://jumiwimov.ru/strik?utm_term=how+strong+is+the+hurricane+on+jupiter. While no scripts were explicitly extracted, the PDF structure and the presence of numerous external links suggest an attempt to exploit users through deceptive content, likely leading to a phishing or malware download site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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=how+strong+is+the+hurricane+on+jupiter
    • https://static.s123-cdn-static.com/uploads/4383798/normal_5ff9d85cbbc65.pdf
    • https://cdn.sqhk.co/sosobita/nK0ibbG/fogopurinaner.pdf
    • https://cdn.sqhk.co/jerivudofin/gYmDnOl/82997100272.pdf
    • https://static.s123-cdn-static.com/uploads/4495681/normal_5ffc9f36c4563.pdf
    • https://cdn.sqhk.co/nugizape/qAuhGhi/37295176668.pdf
    • https://static.s123-cdn-static.com/uploads/4476140/normal_5febf466e21ce.pdf
    • https://cdn.sqhk.co/gadewekunel/rhfjcRo/jezuvapemukiriliwola.pdf
    • https://cdn.sqhk.co/purorelaz/dqhejgM/kaiser_flu_shot.pdf
    • https://cdn.sqhk.co/rubovadu/0Pa0Mjj/57889346374.pdf
    • http://bilabugova.iblogger.org/65785432014.pdf
    • https://cdn.sqhk.co/miseseren/aZdEjea/auto_hashtag_twitter.pdf
    • https://cdn.sqhk.co/kitobanifamo/fihgeij/asn1_decoder_free.pdf
    • https://cdn.sqhk.co/vimewiki/aulXigf/fuwevikijojifur.pdf
    • https://cdn-cms.f-static.net/uploads/4369640/normal_6057f38e3c427.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/wazagidonux/83438827532.pdf
    • https://0e818273-c791-4c7a-b20f-750474b78fe4.filesusr.com/ugd/362633_cd66358bf02b48d0868066970626c40c.pdf?index=true
    • https://s3.amazonaws.com/gebukil/6803111787.pdf
    • https://s3.amazonaws.com/pizivurapab/aristo-_tec_metal_forms_inc.pdf
    • https://89d37d93-eaf9-4fc7-8d5e-07438b8f18e7.filesusr.com/ugd/e80f4c_2860eece52be4a459fb20c9179e5748b.pdf?index=true
    • http://latafutotu.rf.gd/6724005040.pdf
    • https://s3.amazonaws.com/mozedijiz/safety_razor_blades_for_sale_near_me.pdf
    • http://baruneridetaju.epizy.com/azan_ke_baad_ki_dua_download.pdf
    • http://vuremekewema.rf.gd/nibakorakapipim.pdf
    • https://d6ac5066-27fc-4e71-a07d-b30af50dfe8b.filesusr.com/ugd/934fc3_9918792681aa4aa1b841e6eceee934b7.pdf?index=true
    • http://tizepadeda.rf.gd/labiwapaxaraxubumegaveze.pdf
    • https://8860adff-7f0b-4cf3-a358-cdd560dff136.filesusr.com/ugd/625844_4c5e163f2ba2404c953f9622c201b9c7.pdf?index=true
    • https://s3.amazonaws.com/somisilegex/maytag_gemini_double_oven_dimensions.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e811.bin
bb58a9971579b2d3195ef811c8b26577e35daedf2864127f22c6850ec0122e25		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE811 5292 bytes
font_01_sfnt_off0000fa25.bin
3e5a490406864a22e4e4e5fe728c7c781efd8f0108fb8d1c508b3be79abc5422		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFA25 10264 bytes

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