Malicious PDF — malware analysis report

Static analysis result for SHA-256 71ecf0a2353410e0…

MALICIOUS

PDF

72.2 KB Created: 2021-02-27 12:39:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 0e69c8c5088ccaaedb1d662e5fcd9d78 SHA-1: 867f40d17ddf7ec53327ab025358ce22aa91b1c8 SHA-256: 71ecf0a2353410e027947fbeb1bc11a4582e5f4f84886c64445f674e7d0f8b25
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://leonvi.ru/wb?keyword=general%20and%20specific%20deterrence%20theory PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4453719/normal_6035320f9a2e8.pdfIn PDF document text
    • https://cdn.sqhk.co/xufaribo/icjd2Sq/89748191842.pdfIn PDF document text
    • http://topchambre.xyz/fepabpj83r.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427528/normal_6010047240df2.pdfIn PDF document text
    • http://gepexoliv.medianewsonline.com/brother_mfc-9970cdw_printer_driver.pdfIn PDF document text
    • https://cdn.sqhk.co/jeporikate/Dhfgju1/transport_tycoon_fivem_server.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365549/normal_5fe181922f3ea.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415046/normal_6013e728e2241.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453337/normal_600f158e84cbd.pdfIn PDF document text
    • https://cdn.sqhk.co/komajekolino/jagfgco/android_phone_tracker_by_imei_number.pdfIn PDF document text
    • https://cdn.sqhk.co/podadoxafa/dhciqjh/3d_printer_model_download_free.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385850/normal_60032c416f371.pdfIn PDF document text
    • http://submonster.xyz/60627108126qqi7u.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488317/normal_5fd30edb3d7d5.pdfIn PDF document text
    • https://cdn.sqhk.co/migazajigum/jb1jdib/red_and_blue_states_2020_live_updates.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000de04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE04 5376 bytes
SHA-256: 43d5f9588dc0ad8721a1b1d99e350421aca2b307987a0a1dabbba67b3cda16ef
font_01_sfnt_off0000f04e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF04E 10444 bytes
SHA-256: 393a8ab88c557d92124d4eba24490d4c45113c2da2f7fdcea17dace13c3d1b7c