Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd732aa8039376ca…

MALICIOUS

PDF

106.2 KB Created: 2021-02-27 13:00:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: c29ac5294820afc6c5ce48ce0940a9c4 SHA-1: 645b1cd52f8e63fe71bab7c70861fbcb432d9f38 SHA-256: dd732aa8039376cabf9f74c685f942b8e81a51aeba9c217bae9dd07ab5fecdce
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with one heuristic specifically identifying a 'PDF link farm' suggesting SEO manipulation or a phishing lure. The embedded URL points to a domain associated with potentially malicious content. While no scripts were explicitly extracted, the PDF structure and heuristic firings indicate it's designed to redirect users to external sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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://lozipotod.ru/award?keyword=how+to+read+her+body+language+if+she+likes+you PDF link annotation
    • http://osummer.space/76427991501xtw1.pdfIn PDF document text
    • http://xudisoda.66ghz.com/cadena_de_valor_turismo.pdfIn PDF document text
    • https://zigapugulila.weebly.com/uploads/1/3/0/7/130776078/3433547.pdfIn PDF document text
    • http://reduslim-italia.website/37609490872w8du2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387037/normal_601885b94fdff.pdfIn PDF document text
    • http://nout-prokat.website/asrock_n68-s3_ucc____wbqh3w.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370768/normal_6034d33435024.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413011/normal_5fe857bcab44a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/wenobagupexekap/87319879084.pdfIn PDF document text
    • https://s3.amazonaws.com/zemunomipazikez/palamunodabunereratikamex.pdfIn PDF document text
    • http://kiwozoma.epizy.com/how_do_i_know_if_my_lawn_mower_spark_plug_is_bad.pdfIn PDF document text
    • http://mafevela.rf.gd/99434726019.pdfIn PDF document text
    • https://s3.amazonaws.com/kavifunaruvi/political_platform_law_definition.pdfIn PDF document text
    • https://s3.amazonaws.com/tudawufed/video_background_blur_app_android.pdfIn PDF document text
    • https://s3.amazonaws.com/fobupojowojon/94020908625.pdfIn PDF document text
    • https://s3.amazonaws.com/pigolo/7614415434.pdfIn PDF document text
    • https://s3.amazonaws.com/zobuwubedak/vesitewufomixuviwos.pdfIn PDF document text
    • http://kunizifafam.epizy.com/97955331477.pdfIn 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_off0001652b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1652B 5528 bytes
SHA-256: 199c72c481ce87e241d52620e1e06d95069cea3358be8ccb599a892f5f84072f
font_01_sfnt_off00017805.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17805 10240 bytes
SHA-256: ebbf659c08484fc4a45b507087244ab0da28261d2483988f85fc43d514b6df71

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