Malicious PDF — malware analysis report

Static analysis result for SHA-256 41a527c19e16fcef…

MALICIOUS

PDF

76.3 KB Created: 2021-03-30 12:56:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2e87bdc0d45a8647847bddd77a2eb2ae SHA-1: 6d6fafdc628cc38c606124de20c7814994158036 SHA-256: 41a527c19e16fcef2b96075ca733f5227a45e322f0a91b3ff211e590f1edb687
186 Risk Score

Malware Insights

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

This PDF document contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing campaign. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and numerous embedded URLs point towards an attempt to redirect users to malicious sites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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
  • 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://xezojetit.ru/aws?utm_term=which+family+has+2+valence+electrons
    • https://jenifamizoj.weebly.com/uploads/1/3/5/3/135319667/409677c7.pdf
    • http://kosamaritaj.getenjoyment.net/78293794348.pdf
    • https://xuzulofapoxe.weebly.com/uploads/1/3/5/3/135325887/vovazazakew-radatijagov.pdf
    • https://benezome.weebly.com/uploads/1/3/5/4/135400217/bigedupesefasinunu.pdf
    • https://dapijapivabug.weebly.com/uploads/1/3/4/3/134338952/zaruvujibit.pdf
    • https://fewefemuge.weebly.com/uploads/1/3/4/3/134372507/sagodazezobi-puvegiwo.pdf
    • https://cdn-cms.f-static.net/uploads/4472503/normal_6013bff339509.pdf
    • https://menufaron.weebly.com/uploads/1/3/0/7/130775522/8169634.pdf
    • https://kolenogu.weebly.com/uploads/1/3/1/8/131871799/vukulazesedobewumalo.pdf
    • http://serovakarara.mygamesonline.org/toyota_aqua_2020_manual_english.pdf
    • http://kukogekaw.sportsontheweb.net/attestation_de_non_boursier_tunisie.pdf
    • https://puvawenoma.weebly.com/uploads/1/3/3/9/133999826/6626164.pdf
    • https://lobobofu.weebly.com/uploads/1/3/4/6/134680821/4430516.pdf
    • https://static.s123-cdn-static.com/uploads/4366319/normal_5fca12cac031d.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://dd39d194-9042-494f-90ab-223c96cf8da5.filesusr.com/ugd/5d3909_2546717c2123485f9658305e17015556.pdf?index=true
    • https://c3a7a64c-5591-430b-94d7-c2eadfdf3523.filesusr.com/ugd/966478_2167f91db1ab467e8ef1b487e78ab134.pdf?index=true
    • https://13fad4bf-7224-44b3-802b-16842e97d241.filesusr.com/ugd/b14664_fd00ce987ce94560a279ca44cacfa358.pdf?index=true
    • https://c0add167-8731-41f0-9a7b-3d62f09b0499.filesusr.com/ugd/879476_04b4b07db00d41bdb82347e1f5633148.pdf?index=true
    • http://tapoloferazuziw.atwebpages.com/doterra_price_per_drop_sheet_2019.pdf
    • https://979cd01f-16ea-4d2c-b189-234964c95597.filesusr.com/ugd/d4c4cf_7a361f0fdf1245fbbd888ce6f15b1e82.pdf?index=true
    • 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_off0000ebbf.bin
1310417ff7173fb0b3fc2a3d9bfb0739134ca76a1a7230a1314728da90b02b2e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEBBF 5428 bytes
font_01_sfnt_off0000fe29.bin
154baed22ec63e5fffa579d27f550ab3007a8e8a0d02a531d0f212818a9d0338		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFE29 10468 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.