Malicious PDF — malware analysis report

Static analysis result for SHA-256 4168bef8ac2856c7…

MALICIOUS

PDF

78.8 KB Created: 2021-03-27 16:38:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 4b117c808469b0caabaa5f74ddb3e81c SHA-1: 9fac064038b7ce2b4fe80335fbe04751cf1d57e7 SHA-256: 4168bef8ac2856c7b4e67f0a939e1ed265252797e5e3673eb9e89837e2a749c8
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://bologen.ru/wix?keyword=download+meetme+apk+old+version PDF link annotation
    • https://subamepowesita.weebly.com/uploads/1/3/4/8/134875458/serakaluzunazug.pdfIn PDF document text
    • https://misamizejip.weebly.com/uploads/1/3/4/3/134348089/31d67.pdfIn PDF document text
    • https://lisogawe.weebly.com/uploads/1/3/5/3/135312855/be94b34.pdfIn PDF document text
    • http://vanesifonemume.22web.org/colors_odia_tv.pdfIn PDF document text
    • https://wosexepipoto.weebly.com/uploads/1/3/5/3/135347387/3365056.pdfIn PDF document text
    • https://kexowepapu.weebly.com/uploads/1/3/2/8/132815076/nafakebenevoxeji.pdfIn PDF document text
    • http://wuwisometojone.66ghz.com/police_report_writing_tips.pdfIn PDF document text
    • https://nitogumijuta.weebly.com/uploads/1/3/4/8/134876923/bituxagofefetemaloke.pdfIn PDF document text
    • https://nolilozeto.weebly.com/uploads/1/3/5/9/135957670/suvovafotoki.pdfIn PDF document text
    • https://sevafigetof.weebly.com/uploads/1/3/4/9/134902911/ganenozif_gixadipokukom_zovegiwupeg_kasopatamefepu.pdfIn PDF document text
    • https://pamigewome.weebly.com/uploads/1/3/4/6/134631685/nirovifukusukag-viwojup-xugavijakur.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/tevigotu/biometria_hematica_completa_valores_normales.pdfIn PDF document text
    • https://8b7199fc-a029-4910-8138-caee300d1cbd.filesusr.com/ugd/da8f68_480a0e82578941758f31eebc2a435370.pdf?index=trueIn PDF document text
    • https://cc652f91-b1ab-470c-b36f-46d838ef85b2.filesusr.com/ugd/fbccce_e6b337dc91094f32bf1c0341db59e598.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/serogajugomiji/zejawakomimederaju.pdfIn PDF document text
    • https://s3.amazonaws.com/nelizenejakarug/zufumal.pdfIn PDF document text
    • https://s3.amazonaws.com/peveziwoguxuzam/zojaxojesetemozusugojopuw.pdfIn PDF document text
    • https://41fe7446-7195-45c8-906d-de5e784989f9.filesusr.com/ugd/e02969_98c1583aa67440a4b21c0439b60878c7.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gawabog/bazez.pdfIn PDF document text
    • http://todizegi.epizy.com/wall_art_painting_ideas_for_living_room.pdfIn PDF document text
    • https://s3.amazonaws.com/webipejonavuv/tuwavaforesojixamoto.pdfIn PDF document text
    • https://s3.amazonaws.com/sajezife/ceremony_synonym_informal.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d444.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD444 5320 bytes
SHA-256: 43314d889fccfb3d1f41bbb5fc6c6616018fd31f1a2bb43d62cfffe445d31093
font_01_sfnt_off0000e663.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE663 10804 bytes
SHA-256: bb4a83086ae16dfb49ba25c12a255bfc2d7010c1f0cc4686b41910718b9552fd
font_02_sfnt_off00010b8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B8C 20384 bytes
SHA-256: ceea21a110241fa069a306eaef5a32771bd03c782b43da1d7945207bba9c249d

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