Malicious PDF — malware analysis report

Static analysis result for SHA-256 dacd440d92c52c42…

MALICIOUS

PDF

95.7 KB Created: 2021-03-12 07:42:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 1a31a084dd2559cace330fd9b40a4716 SHA-1: cfa8f66cc1ba05138c81d657d8a6facf66810040 SHA-256: dacd440d92c52c42a6c15a50bfad9edee2ad0455094f8ad3d9637f2f352cccfb
244 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a large number of embedded URLs, many of which point to disposable hosting and redirectors, indicating a link farm or phishing attempt. The ClamAV detection and ML classifier strongly suggest malicious intent. While no scripts were directly extracted, the PDF structure and embedded links are indicative of a malicious document designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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/123?utm_term=bitmapfactory.+decodefile+android+example In PDF document text
    • http://mscredit.info/8593759391es0j9.pdfIn PDF document text
    • http://vquest.website/agria_corporation_annual_reportif9kv.pdfIn PDF document text
    • http://fijexojor.getenjoyment.net/pedabogedos.pdfIn PDF document text
    • http://getbuiss.online/dracula_bram_stoker_pelicula_completa_en_espaolkqt42.pdfIn PDF document text
    • http://hocostyle.ru/crusader_kings_2_3.2.1_patch_downloadjg4yt.pdfIn PDF document text
    • http://hargotel.xyz/wing_chun_forms_step_by_stepgdv6l.pdfIn PDF document text
    • http://palikexifumalam.mywebcommunity.org/44473598343.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/dd627e0d-7e5d-4e95-bed7-8058ef990e0c/how_to_draw_3d_animals_step_by_step_easy.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8d27521d-2934-4106-9c98-f9c302cb697e/hp_pavilion_zv5000_audio_driver.pdfIn PDF document text
    • https://aa514bbb-a96e-4bc9-8ff3-0ca2edd1104f.filesusr.com/ugd/3fc21f_3c6251846e724e128f431212201e2492.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/aeac2297-96e7-450e-85ed-900b66328e47/the_importance_of_being_earnest_analysis.pdfIn PDF document text
    • https://s3.amazonaws.com/mogedozara/mitosis_coloring_worksheet_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/sabobenuwe/california_secretary_of_state_form_si-_550.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f295a7d7-12ed-40e5-bd2a-2036098d15c9/percy_jackson_demigod_powers.pdfIn PDF document text
    • https://973697ad-ffa4-4f9d-85cd-0c9d1ea039ee.filesusr.com/ugd/5f5755_ea28408b7e7a4df68386b2ae8be64e5c.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_off0001378f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1378F 5372 bytes
SHA-256: 97c16313fc4dc8963f552ab624f04a05c328e44c329fae7277b22473480b8ae4
font_01_sfnt_off000149d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x149D9 12028 bytes
SHA-256: 4972215a7c676ec73bc75793456a5aa2c55278a28c83f0930b2bb40caaec75b1

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