Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8a4efa6f73be4f9…

MALICIOUS

PDF

77.6 KB Created: 2021-03-14 10:50:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 14dcd34a1c0c423e72760c88532b1b17 SHA-1: 713e96412267d3f7c4fc7e2c402f0d361bd9ed8a SHA-256: e8a4efa6f73be4f9a064cd97e1914955a535130955426e107322ea41041ca191
244 Risk Score

Malware Insights

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

The PDF contains a large number of links to external websites, many of which are hosted on disposable domains, indicating a link farm or SEO spamming operation. Several heuristics confirm the malicious nature of these links, including redirection to known malicious infrastructure. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to direct users to malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://crophysi.ru/award?keyword=15.+5+angle+relationships+in+circles+answers+pdf In PDF document text
    • https://luwujapi.weebly.com/uploads/1/3/4/7/134751522/ratiwisapot.pdfIn PDF document text
    • https://zimegusak.weebly.com/uploads/1/3/4/6/134605775/d2ff54b.pdfIn PDF document text
    • https://felavutiz.weebly.com/uploads/1/3/1/1/131164211/9122536.pdfIn PDF document text
    • http://zobotalemogi.sportsontheweb.net/17264899125.pdfIn PDF document text
    • http://p-kavkaza.ru/bajrangi_bhaijaan_all_songs_free_320kbpsqern4.pdfIn PDF document text
    • https://nepuvojikonutoz.weebly.com/uploads/1/3/4/6/134677469/denadumeduxopewuzog.pdfIn PDF document text
    • https://vazemewezasal.weebly.com/uploads/1/3/0/7/130775722/61b04.pdfIn PDF document text
    • http://sitebomobegux.sportsontheweb.net/qualitative_research__evaluation_methods_integrating_theory_and_practice.pdfIn PDF document text
    • http://mamefumiwuto.mywebcommunity.org/geometria_trigonometria_y_geometria_analitica_conamat_descargar.pdfIn PDF document text
    • https://wabobileminila.weebly.com/uploads/1/3/5/4/135400898/xumedumevubeju.pdfIn PDF document text
    • http://choosemadam.site/833237411875yesn.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/a8511bf3-82c7-45e2-92f2-3c5db7a938fe/93641128525.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3c084a72-515e-47c8-918f-d4f5f6c23b6b/what_extra_books_does_catholic_bible_have.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/efc8b607-e698-4324-997b-dff38f58d3e7/13415883087.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3c678f5f-05d0-4e38-81a8-28bd1e404889/how_to_install_cricut_expression_2.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8701473b-6325-4c9c-b6d7-a39392f5361f/culture_and_imperialism_short_summary.pdfIn PDF document text
    • http://fuvarijes.atwebpages.com/lobefovek.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/98b46735-cff3-4daf-ad8b-6a09e3d31842/6003451575.pdfIn PDF document text
    • http://nanaxidimidi.atwebpages.com/hp_photosmart_7520_ink_cartridges_best_buy.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a786250b-c206-4cde-9d5d-92d3d30cc020/30898142019.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_off0000da60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA60 5620 bytes
SHA-256: 0e1b8b49b92303de11705430d5efc61090c7487787cc9e6d9377aada393db7a6
font_01_sfnt_off0000ed9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED9A 11072 bytes
SHA-256: a8c8cdb966119ae7c4c12abe8642c15c2c6c8e6d1d92225406563dde207cc061
font_02_sfnt_off00011389.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11389 16100 bytes
SHA-256: 60277cf619f3ccfa8388c88b666ea4e207be79ae3918dd12deb215a667e066fc

Open this report in the interactive analyzer, or submit your own file for analysis.