Malicious PDF — malware analysis report

Static analysis result for SHA-256 34dcfdfceabde14f…

MALICIOUS

PDF

77.8 KB Created: 2021-05-13 11:55:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 972101739b82aedc0ab4f5942a3c184f SHA-1: 289e980e29475b975feb4772c5c269dbbdf8fb44 SHA-256: 34dcfdfceabde14f808dde12846f90e005f9b2c86c07e86c795da264e50725c7
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristic 'PDF_SEO_LINK_FARM' suggests the document contains a large number of external links, with one prominent URL being https://druttle.ru/strik?utm_term=kirby+sentria+2+g10+vacuum+cleaner+and+shampooer. This pattern is often used for phishing or to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://druttle.ru/strik?utm_term=kirby+sentria+2+g10+vacuum+cleaner+and+shampooer PDF link annotation
    • https://jovikuveditowe.weebly.com/uploads/1/3/0/8/130874612/7471914.pdfIn PDF document text
    • https://butevexonukuzi.weebly.com/uploads/1/3/2/6/132681970/d37f4a311ae.pdfIn PDF document text
    • https://wixexiwe.weebly.com/uploads/1/3/5/3/135316610/0ff383.pdfIn PDF document text
    • https://bawosizegidaw.weebly.com/uploads/1/3/1/4/131411147/bikanavude-fugejuwuf-welotoligo-xufakuf.pdfIn PDF document text
    • https://zotekuruwufuk.weebly.com/uploads/1/3/4/1/134108654/guwiwopofunovuze.pdfIn PDF document text
    • https://kuvopesi.weebly.com/uploads/1/3/2/3/132303138/6771656.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://ae26bae5-b1f3-4fb2-a0ba-5d2f2d23988c.filesusr.com/ugd/aec2ea_2f86ee1b34c848b988a0eca5652781d2.pdf?index=trueIn PDF document text
    • https://81866859-049a-499f-9904-b5dd27b5453f.filesusr.com/ugd/84a5c6_d7fa908cddbd4e16829599924aeb8fad.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/mogedozara/batman_vs_superman_desenho.pdfIn PDF document text
    • https://s3.amazonaws.com/waxapoz/annapurna_trek_sans_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/fejenijovekozu/fexozuj.pdfIn PDF document text
    • https://s3.amazonaws.com/lixisariwulo/vizio_e601i_a3_software_update.pdfIn PDF document text
    • https://08202b68-adf4-4b7d-bb06-fcebe54c78b8.filesusr.com/ugd/76dd3d_0172c19fd7604729999d0f7b6232b3e6.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dazifozixawus/eisenhower_matrix_excel_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/rozebofukixus/treatment_resistant_schizophrenia_nice_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/gomaxod/53460902945.pdfIn PDF document text
    • https://4b4b92a8-4ac5-4030-97d5-af0917f8c077.filesusr.com/ugd/0251f0_3fd7849e85a44e168bffaa0741aac483.pdf?index=trueIn PDF document text
    • https://e6a48395-9ebc-465e-8505-c4b20d7b8e72.filesusr.com/ugd/81e12b_ebb34607befd40eaac2a4a53afe5c3a7.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fizup/what_does_a_pecha_kucha_mean.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_off0000eef7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEF7 6084 bytes
SHA-256: c363b177004f6d8ffa90208e6eea9f2f80f1c450131825a564efdf97a9e04da5
font_01_sfnt_off00010394.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10394 11320 bytes
SHA-256: 5abafe773d07bb1f1108ee62b5ad55a04bbab6a64735b078eaddb3b2586342c1

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