Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7872f5438f217fd…

MALICIOUS

PDF

79.5 KB Created: 2021-03-23 06:06:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 59c4999ec24958ac7262712e82de039c SHA-1: 7eeb69dc00b23d11e9494e40ba97d12ca66cb85c SHA-256: e7872f5438f217fd2fc154787d2037b8772f0e443af58ec061217a92bf436ec3
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many hosted on Weebly, suggesting a link farm or phishing attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and numerous external URIs point towards a malicious document designed to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://xezojetit.ru/wix?keyword=popular+rappers+word+whizzle+answers
    • https://fuwipinax.weebly.com/uploads/1/3/4/0/134016709/7270197.pdf
    • http://gooddevice-online.com/evangelio_de_tomas56n2n.pdf
    • https://jezinuva.weebly.com/uploads/1/3/4/8/134869759/loxamademak.pdf
    • https://gozerezujokosas.weebly.com/uploads/1/3/4/8/134856803/7962590.pdf
    • https://nivikaxixigimom.weebly.com/uploads/1/3/5/3/135322477/99a67836004d50b.pdf
    • https://cdn.sqhk.co/javijaxim/ighbKih/29404397187.pdf
    • http://randname.ru/excel_2013_vs_2016_differenceslii5i.pdf
    • https://xuwekakef.weebly.com/uploads/1/3/1/8/131856316/donuvi_mivekegit.pdf
    • https://cdn.sqhk.co/xekejegixawo/vhHEiea/mercado_pago_chile_cuotas.pdf
    • http://gnfcns.info/pozubewalupafowugiptu9r5.pdf
    • http://moneymaya.site/how_to_marry_legally_in_indiacthzq.pdf
    • http://fionainthefield.org/782320930216d1ex.pdf
    • https://cdn.sqhk.co/xataruzepape/g81Sjd6/83658702062.pdf
    • http://avlto.best/vogedewirosidetivukilamubj4q3q.pdf
    • http://funseeds.site/malijik15yhf.pdf
    • https://cdn.sqhk.co/fagijopi/ibp7q5z/remepolivewaxuw.pdf
    • https://cdn.sqhk.co/paxajirawegu/cKH1Djh/circle_hole_cutter_sheet_metal.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://4f65501f-cdae-4966-b9db-49b15ad9d196.filesusr.com/ugd/52b593_2c271561b10c4a50ac0c1ef70b1d00e5.pdf?index=true
    • https://17851959-1482-4b49-8222-7b7b0c628459.filesusr.com/ugd/3cb679_395fcfbe743e44dd9a1364836f747be4.pdf?index=true
    • https://s3.amazonaws.com/wazotojemov/test_de_8_inteligencias_multiples.pdf
    • https://6440a9f6-5e82-4153-977b-4ffe9374ec4a.filesusr.com/ugd/7182f3_a19e5cdd13474d2584805a3596bb8d79.pdf?index=true
    • https://s3.amazonaws.com/bufipevuril/93537868385.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_off0000f7ab.bin
862cb707723569735aa8572893e3bc3e1d4c715de18ace3d4507d993b1197b0c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF7AB 5188 bytes
font_01_sfnt_off00010958.bin
cf961add14150e086432979ba2230699bcc3efb1cc10088eb176798666baf333		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10958 11512 bytes

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