Malicious PDF — malware analysis report

Static analysis result for SHA-256 907f53b65b2dba35…

MALICIOUS

PDF

82.0 KB Created: 2021-02-08 18:57:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 484506f83935e37abb3e879269cdbf06 SHA-1: b2dea4abc0a779afd2a7d515066fb9ec821e3847 SHA-256: 907f53b65b2dba35c7b24ce0d6464e970bad5404a1b3c556d57bbfee6c063d7f
176 Risk Score

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
  • 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.
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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=tcs%20aptitude%20test%20questions%20with%20answers PDF link annotation
    • http://akfb.online/artstudio_pro_brushesnfzjp.pdfIn PDF document text
    • http://omerkatanalp.com/name_of_body_parts_songjz5vg.pdfIn PDF document text
    • http://vereffka.xyz/85422571087om4py.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387417/normal_5ffe4e2d66e6f.pdfIn PDF document text
    • http://bubble1.space/dune_book_2_audiobookgzyhc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391008/normal_5ffc9f99d9513.pdfIn PDF document text
    • http://kamini33.ru/cavalcadepublishing_com_balancing_chsj0u5.pdfIn PDF document text
    • https://cdn.sqhk.co/jutafegobexe/fWic9ih/rayman_fiesta_run_pc_download.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416930/normal_5ffe0b21b3c08.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386086/normal_6003c4834598d.pdfIn PDF document text
    • http://cmbmarketing.agency/sototonixivipuzutejitond4r1k.pdfIn PDF document text
    • http://upgrade4me.com/narcos_cartel_wars_tips_and_tricksrud8b.pdfIn PDF document text
    • http://cartest.pro/bronze_age_inventions_timelinejjpm8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nalakakowim.epizy.com/mafatisamotatiresulabokaw.pdfIn PDF document text
    • http://pasivete.epizy.com/all_live_tv_apk_for_android.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_off0000ff9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF9F 5296 bytes
SHA-256: d5096ebdf418715ccbef40c72738239076b5bb96623ddf055db944d21896a176
font_01_sfnt_off000111b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111B0 12156 bytes
SHA-256: 77aff096d949b995e60b6a467dcef2ba8bf615ed44f4388252f915b461f50be0