Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb236be8c187c189…

MALICIOUS

PDF

78.8 KB Created: 2021-02-27 09:54:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 507d3906fc16ad6cdf0a42d5ca726059 SHA-1: 12c64f1cbccc8cc8d4821bf4ea8fd02b0ccd835d SHA-256: eb236be8c187c189ba0fee587a49bba68b91f205ced2471c0d5c95be2d13d9ec
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 0.9998

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://resalured.ru/strik?utm_term=which+big+dogs+don%2527t+shed PDF link annotation
    • http://mesugowogidevik.iblogger.org/marvel_spider_man_comics_free_download.pdfIn PDF document text
    • http://fasekafalig.scienceontheweb.net/american_red_cross_cpr_and_first_aid_study_guide.pdfIn PDF document text
    • https://wutejaguruloz.weebly.com/uploads/1/3/1/8/131871665/8122855.pdfIn PDF document text
    • http://lokogosomezik.iblogger.org/latest_ugandan_chimp_reports_news.pdfIn PDF document text
    • http://fisareboveda.getenjoyment.net/what_is_the_project_management_institute.pdfIn PDF document text
    • http://worelimupuvefam.mywebcommunity.org/93764809658.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tafujeloraxofo.epizy.com/castiel_true_form_fanfiction.pdfIn PDF document text
    • http://dinelak.rf.gd/91688093572.pdfIn PDF document text
    • http://risogida.rf.gd/ethiopian_orthodox_film_free.pdfIn PDF document text
    • http://texatopewewew.epizy.com/jetokonozisotovuvenefulo.pdfIn PDF document text
    • https://s3.amazonaws.com/viromibukoleliw/best_music_video_er_website.pdfIn PDF document text
    • http://fovawipemezipu.myartsonline.com/mibazixilutisasete.pdfIn PDF document text
    • https://s3.amazonaws.com/lekezaru/loan_against_marksheet_in_patna_bihar.pdfIn PDF document text
    • https://s3.amazonaws.com/babetafaperaxov/vukanebakas.pdfIn PDF document text
    • https://s3.amazonaws.com/nupotukig/sony_android_tv_49_4k.pdfIn PDF document text
    • http://jaxunukologefis.onlinewebshop.net/whats_the_difference_between_sequence_and_chronological_order.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_off0000e3dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3DD 5048 bytes
SHA-256: e610a87fe6e770c8de9d3b9cd3820f38f297674f89d8005b82de4f63f0ebbc61
font_01_sfnt_off0000f523.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF523 10664 bytes
SHA-256: eb8dbdde97fbf8854500ed712b0cae6b924717716c7ff2bbf163d4ccc7692caa
font_02_sfnt_off000119bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119BB 16028 bytes
SHA-256: 0bae8649ba252bcfab81cb8324cfe1737d73e47191b507e117e6d0858e0066a8