Malicious PDF — malware analysis report

Static analysis result for SHA-256 46badd404d49c399…

MALICIOUS

PDF

79.4 KB Created: 2021-03-18 04:53:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 79789500d7db754d02729d5da686576d SHA-1: 415574a605f6df75077ec697b7c31ca60ac36a72 SHA-256: 46badd404d49c39988e761da87e14c492604c3bab1e7c80a2d59440893a723c7
164 Risk Score

Malware Insights

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

The PDF file contains numerous external links, indicative of a link farm designed to distribute traffic and potentially host malicious content. The presence of a download button lure and the ClamAV detection as 'Pdf.Phishing.Trojan' strongly suggest a phishing or malware distribution attempt. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with techniques used to deliver second-stage payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://nipisod.ru/wix?keyword=war+robots+apk+mod+2020
    • http://pro-konditer.com/will_it_snow_in_eugene_oregon2fa6v.pdf
    • http://lunagogafoxoj.sportsontheweb.net/lawuka.pdf
    • http://balifruit.com/ejercicios_de_comprension_lectora_segundo_grado_para_imprimirnbjua.pdf
    • http://katermore.ru/cisco_routing_and_switching_troubleshooting_guide5d38y.pdf
    • https://peziwotikiju.weebly.com/uploads/1/3/4/6/134602895/de1a30.pdf
    • https://zemutixo.weebly.com/uploads/1/3/4/8/134865820/d4cf56017b3263.pdf
    • http://zijixiteluwek.scienceontheweb.net/wojelibanokexusebu.pdf
    • https://cdn-cms.f-static.net/uploads/4453890/normal_600b46bcc425e.pdf
    • https://kabuxezalexafa.weebly.com/uploads/1/3/0/8/130814122/7d2c3117b7fde.pdf
    • https://gupolapi.weebly.com/uploads/1/3/4/6/134629895/3980367.pdf
    • http://lotto-investclub.com/what_are_the_types_of_flight_control_systems094pz.pdf
    • https://sabopedawexidix.weebly.com/uploads/1/3/4/3/134305122/potasafokudila_jilolaga.pdf
    • https://cdn-cms.f-static.net/uploads/4413110/normal_602e7b1462258.pdf
    • http://bonus332.site/187763747247q59o.pdf
    • https://jovinafunen.weebly.com/uploads/1/3/2/6/132695325/6b4b2a1.pdf
    • https://rasegopejut.weebly.com/uploads/1/3/4/3/134317160/5469a3f581cda4.pdf
    • https://jutijodofolumel.weebly.com/uploads/1/3/4/0/134012985/f91f53cc.pdf
    • http://rijewomel.scienceontheweb.net/how_to_properly_install_a_pipe_union.pdf
    • https://static.s123-cdn-static.com/uploads/4460473/normal_5ff7c671588bd.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://vawirir.atwebpages.com/academische_vaardigheden_voor_interdisciplinaire_studies.pdf
    • http://zivonupawidam.atwebpages.com/57433007993.pdf
    • https://5a8aee2d-3d68-4c09-98ed-743c9c56d6fd.filesusr.com/ugd/460efe_f1eb4359cf244f5a9b0a6b749ec791a2.pdf?index=true
    • https://656adf98-7a81-40bd-8d0f-2b9c27d09201.filesusr.com/ugd/268ab1_d9a0c980e3864b84b9048c0f992e2e83.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_off0000f59c.bin
1c779ee49e2b091f6e67e2350c3262075f6c35232877ec2fcd31e118fa95459b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF59C 5564 bytes
font_01_sfnt_off0001087f.bin
b77fe61c346e722f7e32236ebbe4af5f6b9a24efda5515432df3de7a83c2d5b4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1087F 11588 bytes

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