Malicious PDF — malware analysis report

Static analysis result for SHA-256 40c8d5a59a2b2d8f…

MALICIOUS

PDF

78.3 KB Created: 2021-03-05 03:25:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 87312764de9c1e0e61511959b572225a SHA-1: a9e4ab1a9f1f20839fbbd99081d4183d0d6edc27 SHA-256: 40c8d5a59a2b2d8fc7cd4b383626b88087687f354db4ccf9f43d5cce071ad65a
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are suspicious and appear to be part of a link farm designed to direct users to potentially malicious sites. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware distribution. While no scripts were directly extracted, the PDF structure and numerous external links suggest it's designed to exploit users through deceptive content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://resalured.ru/strik?utm_term=john+deere+mowers+with+baggers PDF link annotation
    • http://cartest.pro/rising_stars_mark_sheetyke91.pdfIn PDF document text
    • http://nout-sale.site/vedapitebiguwibimosar3lr69.pdfIn PDF document text
    • http://shoop-fn.ru/lakokorinimodonund21oy.pdfIn PDF document text
    • https://cdn.sqhk.co/fumodolanes/hifYTHi/65516548897.pdfIn PDF document text
    • http://legrand-spb.ru/bujesilofebimnq6xg.pdfIn PDF document text
    • https://cdn.sqhk.co/xamubana/mhbigie/jomiwewarapaz.pdfIn PDF document text
    • https://cdn.sqhk.co/labifikup/ohdCazE/81519029495.pdfIn PDF document text
    • https://cdn.sqhk.co/sifujubagis/hfwKgdI/silver_glitter_background_wallpaper.pdfIn PDF document text
    • http://maewallace.com/camera_capture_button_androidu0r2e.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/jutenojamega/how_much_is_james_fletcher_worth.pdfIn PDF document text
    • https://s3.amazonaws.com/tosego/purpose_driven_life_day_15.pdfIn PDF document text
    • https://s3.amazonaws.com/vikukinumet/zasesakawubepuxikono.pdfIn PDF document text
    • https://s3.amazonaws.com/ladojenefe/digestive_system_coloring_worksheet_answers.pdfIn PDF document text
    • https://07d68bf2-0661-47e2-9ffe-eae068a071af.filesusr.com/ugd/fef806_bfb755088e194a9eb28880b6c59a66b0.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wezukep/16719374357.pdfIn PDF document text
    • https://s3.amazonaws.com/sitozi/lipijulebifigenekupa.pdfIn PDF document text
    • https://s3.amazonaws.com/jiguwuzobozobaz/share_call_option_agreement_template.pdfIn PDF document text
    • https://s3.amazonaws.com/mexesazaxasa/carry_on_jatta_2_theatre_print.pdfIn PDF document text
    • https://s3.amazonaws.com/pobixedele/vizorugabu.pdfIn PDF document text
    • https://1c54689f-8f60-44d8-8d81-b144d6ea8ada.filesusr.com/ugd/787b0a_259fd5baf76346169068308d81592437.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jadere/47221463495.pdfIn PDF document text
    • https://s3.amazonaws.com/xonaxevetaf/doterra_brevi_diffuser.pdfIn PDF document text
    • https://s3.amazonaws.com/vitelitubovuluj/cabinet_office_manual_nz.pdfIn PDF document text
    • https://s3.amazonaws.com/nunakixuma/49854774785.pdfIn PDF document text
    • https://s3.amazonaws.com/rejiner/batman_vs_superman_movie_trailer.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_off0000f3ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3CE 5428 bytes
SHA-256: e37573197ed877b35b78608960eff19be97484540203cf23e47d41cba063157e
font_01_sfnt_off00010621.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10621 11124 bytes
SHA-256: afae557f1742925131a3c40cd46dffbeeb4be042d28dc278446ed69ba95ad997

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