Malicious PDF — malware analysis report

Static analysis result for SHA-256 4bd8053b84f37cb9…

MALICIOUS

PDF

77.9 KB Created: 2021-03-12 00:40:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 22aaf0aea103aff696762017b059fcc9 SHA-1: 6afb0708bafd18c932865fa2555f6063580286ca SHA-256: 4bd8053b84f37cb9b5f685d6ed90345ebce5db974990a5b216372c10e93fdf29
194 Risk Score

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
  • 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.
  • 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.
  • 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://yafferge.ru/wix?keyword=best+finishing+badges+2k20+slashing+playmaker In PDF document text
    • http://zejegilige.iblogger.org/power_of_prayer_biblical_quotes.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489407/normal_6049394192399.pdfIn PDF document text
    • http://temezisabekazev.iblogger.org/holy_bible_in_english_and_shona.pdfIn PDF document text
    • http://waniwidolo.66ghz.com/vuliligo.pdfIn PDF document text
    • http://fawetugamuxix.66ghz.com/caflisch_script_web_pro_font_free.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4372399/normal_5fe199938eee9.pdfIn PDF document text
    • http://nuweselomarovir.22web.org/12_week_crossfit_workout_plan.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/gogunabones/gelakolufomowoxajepigi.pdfIn PDF document text
    • https://s3.amazonaws.com/tonemakopinibem/76545950478.pdfIn PDF document text
    • https://s3.amazonaws.com/pavujiniz/define_annotations.pdfIn PDF document text
    • http://bimuvugibane.rf.gd/gevilibupiwemawotagegax.pdfIn PDF document text
    • https://s3.amazonaws.com/seriposuj/jexifavuxif.pdfIn PDF document text
    • http://nujipuluz.epizy.com/verelunekutuxunoravox.pdfIn PDF document text
    • http://napuganenafu.rf.gd/mixujapof.pdfIn PDF document text
    • https://s3.amazonaws.com/xanunafojuloki/steam_speed_slower_than_internet.pdfIn PDF document text
    • http://levolavajoji.epizy.com/kizepixawoxosu.pdfIn PDF document text
    • https://s3.amazonaws.com/wulagisi/domirexezevovidiza.pdfIn PDF document text
    • https://s3.amazonaws.com/sixenogafopoj/latest_yahoo_messenger_for_windows_10.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_off0000f34a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF34A 6084 bytes
SHA-256: 8f0ae91dc28daed585e76ad1d0eb3226e847be6c93c4506b8476a2a4388377c1
font_01_sfnt_off000107e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107E0 10128 bytes
SHA-256: 8869169759d06bf115b058767047c4445ff0ead89bc59a5a1d092dc9808c6963