Malicious PDF — malware analysis report

Static analysis result for SHA-256 5da2e85aba10d3c1…

MALICIOUS

PDF

84.0 KB Created: 2021-03-10 03:10:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: af5eced9cece57a725db15445bad9406 SHA-1: 04b2fb934f5d0082dec0fc5b0aeb3e302fcfdfb3 SHA-256: 5da2e85aba10d3c10b53da8bc67846d92f1e66d2d29153552b0c5992d72a38f3
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a technique often used for SEO spam or to redirect users to malicious sites. The ML classifier and ClamAV detection strongly indicate malicious intent, specifically identified as a phishing trojan. While no scripts were directly extracted, the PDF structure and embedded URIs suggest an attempt to lead users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 6

  • 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 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.
  • 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://leonvi.ru/123?utm_term=insurance+broker+business+plan+template PDF link annotation
    • http://stingeksoj.online/love_calculator_app_apkpureodgqf.pdfIn PDF document text
    • http://ig-copyrightnoticehelp.com/kanger_mini_protank_2_manualm48rb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4428054/normal_603e8b94a14b9.pdfIn PDF document text
    • https://dimutaribosisup.weebly.com/uploads/1/3/4/4/134444719/jupabo.pdfIn PDF document text
    • http://domsale.xyz/newulezilexosabokit6kved.pdfIn PDF document text
    • https://xevibobi.weebly.com/uploads/1/3/4/6/134683071/jobaxibe_joxorerazesibo_biveki.pdfIn PDF document text
    • https://ratofesut.weebly.com/uploads/1/3/5/3/135304008/8d9adb2713746be.pdfIn PDF document text
    • http://zomosidotewe.sportsontheweb.net/alta_frecuencia_facial.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481155/normal_603d9a9c82a72.pdfIn PDF document text
    • https://kilewesiviteki.weebly.com/uploads/1/3/1/1/131163613/ee4635c9.pdfIn PDF document text
    • http://mitatizizuje.mypressonline.com/narabuv.pdfIn PDF document text
    • http://idealsit.space/lamborghini_chalai_jande_ho_song_raagsong._comsq3c8.pdfIn PDF document text
    • http://italiahot.space/vipeximolovam0tiit.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420588/normal_60017bbf3b9b2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://78151a86-a557-4e49-81aa-a2539eea45c7.filesusr.com/ugd/204f4f_b9302789330b44c0932be93da38b1b03.pdf?index=trueIn PDF document text
    • https://ced6af22-cf5f-4df0-9cd6-2d424634d287.filesusr.com/ugd/3eed2b_75df1a600d0342caa9e90cb0aa3403c0.pdf?index=trueIn PDF document text
    • https://a1c9bafd-2917-4c1b-b79c-a4b44a941470.filesusr.com/ugd/f0f215_cb1cd8de036b40b5ac61a5ee59ec5d34.pdf?index=trueIn PDF document text
    • https://168d2a81-f750-40c6-a653-3787650f980d.filesusr.com/ugd/3bcfef_43939ea76510470d831237e20e3bf0c0.pdf?index=trueIn PDF document text
    • https://0ef2f354-78a3-4528-990c-72f69c86fc6a.filesusr.com/ugd/6a0da6_ee511a8cba8e42f99fefd812dd1daf0b.pdf?index=trueIn PDF document text
    • https://37bdae34-bb2f-403f-997c-54a7c09d9c06.filesusr.com/ugd/dc98cc_dac41dc97a73444881ccfa96985379c2.pdf?index=trueIn PDF document text
    • https://493f174a-a540-412c-bacb-e5b7b26cbfcf.filesusr.com/ugd/95bb70_ce903c08f9554ea0b907790d9fcb4a6e.pdf?index=trueIn PDF document text
    • https://e966359d-176b-477a-9ad9-c314bea94227.filesusr.com/ugd/fa6f14_9cba7b82973b472693e34e18e7a6cf52.pdf?index=trueIn PDF document text
    • https://4ec63ec4-77bf-4499-900e-7c522af20654.filesusr.com/ugd/35bdb9_6b2d29c6ed19494cb48207753ad127be.pdf?index=trueIn PDF document text
    • http://polilofu.onlinewebshop.net/star_wars_thrawn_ascendancy_book_1_chaos_rising.pdfIn PDF document text
    • https://a3cd4400-5fdc-4e6a-bda8-88556a2d4d1f.filesusr.com/ugd/2f7489_4e48dbed8a0d467d900f554097d601eb.pdf?index=trueIn 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_off00010a47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A47 5220 bytes
SHA-256: b89121bb22bdce40b9acafac163d409832d68169d8d8329a804e3bb5f3e4ff03
font_01_sfnt_off00011bef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BEF 11172 bytes
SHA-256: de236e4c276c0456ea27674075b15ed2a038627a607ac5202bd1e4b77a5a7223