Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3bdfce7488695b0…

MALICIOUS

PDF

85.7 KB Created: 2021-04-08 19:31:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e939db6891a5a3d22b5469794b75f6f5 SHA-1: b062e90bd6a44dfe5f5f14d6ae83344985bd188d SHA-256: f3bdfce7488695b0566c37438dc907b4a4765e00f7348723526435472685f942
156 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. The heuristic 'PDF_SEO_LINK_FARM' indicates the presence of numerous external links, suggesting a phishing or content-luring attempt. The embedded URLs likely serve to redirect users to malicious sites or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://zajinet.ru/strik?utm_term=divina+commedia+inferno+canto+6+parafrasi
    • http://virujurarajilef.getenjoyment.net/zubawumafodomop.pdf
    • https://cdn-cms.f-static.net/uploads/4420910/normal_604af12968f90.pdf
    • https://sufixekanol.weebly.com/uploads/1/3/4/7/134712322/fudasufo-gatore.pdf
    • https://cdn-cms.f-static.net/uploads/4496402/normal_6057fd7c00b21.pdf
    • https://static.s123-cdn-static.com/uploads/4366949/normal_5ff18f57c431f.pdf
    • http://tevituvodejifep.mywebcommunity.org/analysis_of_variance_scheff.pdf
    • https://cdn-cms.f-static.net/uploads/4405467/normal_601526be680be.pdf
    • https://sigudadu.weebly.com/uploads/1/3/4/5/134513773/471283.pdf
    • http://fefiwizam.sportsontheweb.net/81739373103.pdf
    • http://mawosatejojeka.sportsontheweb.net/xisimud.pdf
    • https://duzesoduvumasu.weebly.com/uploads/1/3/4/1/134131570/d1820.pdf
    • https://cdn-cms.f-static.net/uploads/4454670/normal_603f4922de407.pdf
    • https://static.s123-cdn-static.com/uploads/4420039/normal_5fc627995fa3c.pdf
    • https://cdn-cms.f-static.net/uploads/4384159/normal_603a471fd1c95.pdf
    • https://rizogedimawe.weebly.com/uploads/1/3/0/7/130739598/fanaluso.pdf
    • https://cdn-cms.f-static.net/uploads/4482191/normal_606e7426a1235.pdf
    • https://cdn-cms.f-static.net/uploads/4415937/normal_602005965cea8.pdf
    • https://dapijapivabug.weebly.com/uploads/1/3/4/3/134338952/4637783.pdf
    • https://cdn-cms.f-static.net/uploads/4412894/normal_6050b1ddcaca4.pdf
    • https://cdn-cms.f-static.net/uploads/4375896/normal_6035c1ce3fc02.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://79e5ec13-148a-49e7-9308-7b7844992bd9.filesusr.com/ugd/1d149b_b8224a4e6bd74c129cbece048f87b228.pdf?index=true
    • http://zubiluwetij.myartsonline.com/natimen.pdf
    • https://6c036dbd-b327-4678-b778-de8a2ee7bb50.filesusr.com/ugd/ed64d2_6326fbfb7ed648fc89144b9474cde84b.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_off00010e29.bin
743f0cf56f72aa98f86ddabcbe2ddafd0d40b943c0e296a55fefb9f29472ec90		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10E29 5484 bytes
font_01_sfnt_off000120c8.bin
9029221f534ded0cc76a2f3ddde031806afa6a0d5ed801821cff0f65d0e4cc48		 pdf-font-stream PDF embedded font (sfnt) at offset 0x120C8 11816 bytes

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