Malicious PDF — malware analysis report

Static analysis result for SHA-256 1dd6a592b0e75f76…

MALICIOUS

PDF

79.5 KB Created: 2021-03-30 21:11:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 56a8929dc232fc9fec128872b476a3be SHA-1: 755f286dc7fc78f759f974b40441afa0b8f67240 SHA-256: 1dd6a592b0e75f76c051d1da7b3ab5be3e94ffc159b8ffd44687cbdacdb97c9b
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 0.9994

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://kuzutuzo.ru/award?keyword=translate+arabic+to+english+pdf+file PDF link annotation
    • https://nubesojobe.weebly.com/uploads/1/3/1/3/131398221/2552665.pdfIn PDF document text
    • http://folugomobok.getenjoyment.net/raloz.pdfIn PDF document text
    • https://pakefexudexabe.weebly.com/uploads/1/3/0/9/130969404/6e632d5f8e.pdfIn PDF document text
    • http://lezigovedavide.getenjoyment.net/mefumotube.pdfIn PDF document text
    • http://mazipuvaxa.mywebcommunity.org/gemamu.pdfIn PDF document text
    • https://balolekuzuwuvaz.weebly.com/uploads/1/3/0/7/130740598/8037367.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/simujix/pakistan_embassy_form_b.pdfIn PDF document text
    • https://s3.amazonaws.com/muxegeza/duzukutudus.pdfIn PDF document text
    • http://satovimowenijor.myartsonline.com/xivuzesupi.pdfIn PDF document text
    • https://s3.amazonaws.com/falufusu/80871793496.pdfIn PDF document text
    • https://s3.amazonaws.com/fekife/google_cardboard_apk_android_8.0.pdfIn PDF document text
    • http://pejemevogoge.myartsonline.com/archeological_anthropology.pdfIn PDF document text
    • https://s3.amazonaws.com/nutanigonu/how_do_you_know_if_your_marriage_is_worth_saving.pdfIn PDF document text
    • https://07f52280-50dc-49c2-beec-a2e30bf849d0.filesusr.com/ugd/7b8f90_641bc38b301a4da2a7e72df56401abe2.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fatikonavori/android_bluetooth_earbuds_too_quiet.pdfIn PDF document text
    • https://s3.amazonaws.com/wexoteluwag/how_to_carry_out_multivariate_analysis.pdfIn PDF document text
    • https://s3.amazonaws.com/goveruduzewoxu/sylvia_day_georgian_series_read_online.pdfIn PDF document text
    • https://d451e762-8e00-4155-9971-9512d28d2528.filesusr.com/ugd/b52961_cb7df960d25945758a72f51214cf582c.pdf?index=trueIn PDF document text
    • http://woxikajir.myartsonline.com/cardiopulmonary_resuscitation_review_article.pdfIn PDF document text
    • https://9387bd13-3746-4408-b474-2867f26e464d.filesusr.com/ugd/ace02d_6b73984855ad4ed19aba839d60055794.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sezebepit/gixovevoviruledufato.pdfIn PDF document text
    • https://s3.amazonaws.com/rimejiguvif/9584137626.pdfIn PDF document text
    • https://99442e0c-e188-470f-b1e9-a2082f9e7f28.filesusr.com/ugd/2274a7_becd4857213d40f6b906f81879814582.pdf?index=trueIn 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_off0000f877.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF877 5504 bytes
SHA-256: 0abeaedab20496586df6d905d785ce251227641cd4344b0520d1dee2dabaf88a
font_01_sfnt_off00010b19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B19 11344 bytes
SHA-256: d7dce49cf631b3f864545990f55619401786d78be824f71cb23defebd14a4ed6

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