Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f8201395ae2ad66…

MALICIOUS

PDF

74.3 KB Created: 2021-05-23 18:47:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7f62ecb1f26d8478087135f3b6411d7a SHA-1: 540aea2001ea5cf8423745f14b83533a81632676 SHA-256: 7f8201395ae2ad660cea07196ef65bbfdd3a5bacf336867ea959948f7ac3170d
154 Risk Score

Malware Insights

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

The PDF contains numerous external links, identified as a link farm, directing users to various websites. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the PDF structure and the presence of external links suggest it's designed to redirect users to potentially malicious sites, possibly for phishing or to download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8673

Heuristics 4

  • 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
  • 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://golowaki.ru/strik?utm_term=planificador+semanal+2020+pdf+gratis
    • https://gegoviboz.weebly.com/uploads/1/3/4/8/134876631/67c0f4.pdf
    • https://nagobajega.weebly.com/uploads/1/3/1/3/131380413/a6050cf95.pdf
    • https://zuwuroxiver.weebly.com/uploads/1/3/1/0/131070979/riritegalebujigewu.pdf
    • https://baxemazone.weebly.com/uploads/1/3/0/7/130739829/bisuzonebavagalit.pdf
    • https://rifodajawu.weebly.com/uploads/1/3/0/7/130739776/setozemugibekameb.pdf
    • https://static.s123-cdn-static.com/uploads/4403260/normal_5fe152078451f.pdf
    • https://cdn-cms.f-static.net/uploads/4415962/normal_604841dbeaacf.pdf
    • https://vefujavud.weebly.com/uploads/1/3/4/8/134857174/gezalivegafijuziba.pdf
    • https://static.s123-cdn-static.com/uploads/4491723/normal_6005f81f01853.pdf
    • https://cdn-cms.f-static.net/uploads/4486565/normal_5fe8fc95c7177.pdf
    • https://kikobuvikivevir.weebly.com/uploads/1/3/1/4/131437815/xodariweji_wanizokuzu_defemizul.pdf
    • https://vapovudinawixe.weebly.com/uploads/1/3/1/4/131437980/luseniv_nawukabimu_zaxusu_luwoxawumetax.pdf
    • https://lanizozegew.weebly.com/uploads/1/3/5/3/135309184/8b08c.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/418a1c7e-f750-419b-94be-36dc8a91119a/how_to_smoke_country_style_ribs_on_masterbuilt_electric_smoker.pdf
    • https://s3.amazonaws.com/mojivikapeti/libro_aula_espaol_para_extranjeros.pdf
    • https://uploads.strikinglycdn.com/files/7d91f828-a384-412f-b15b-cb6fe5aa9757/55580558972.pdf
    • https://uploads.strikinglycdn.com/files/bc59c577-65d3-44dc-983c-b3f656d34894/divx_converter_10_serial_number.pdf
    • https://uploads.strikinglycdn.com/files/fe3395fd-d97f-45ec-b835-9598ab4f8d8a/napexivuwakavof.pdf
    • https://s3.amazonaws.com/dejolavubukugeb/ireport_pass_parameter_to_subreport.pdf
    • https://s3.amazonaws.com/nufidibodudulad/fnma_appraisal_form_1007.pdf
    • https://uploads.strikinglycdn.com/files/4f00c65c-07aa-4f98-8ce9-ddfbc3840233/paparazzi_phone_number.pdf
    • https://s3.amazonaws.com/lakadutof/fawoworabivewenaxejotufaw.pdf
    • https://uploads.strikinglycdn.com/files/2aeafeaa-02ff-4c0c-b957-fd20f95e15ef/why_are_my_shortcuts_not_working.pdf
    • https://s3.amazonaws.com/zerepuzuze/diwuxipap.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001094c.bin
07efd4b5ce35fe43d562a47bea6ca2be7e52a32f6dbf0d49a2a72276c44a66d1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1094C 3016 bytes
font_01_sfnt_off00011407.bin
9e245362a87360b43a28e38d6dc520166bae9cd947315f04ee31064c4109fde7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11407 5540 bytes

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