Malicious PDF — malware analysis report

Static analysis result for SHA-256 023ebb12490a077f…

MALICIOUS

PDF

71.5 KB Created: 2021-03-01 01:27:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: ed9d78db2b68816407eb6d5c7419af96 SHA-1: ca91b322f684f0ad4e1adfa44dfca63dbf7b31ab SHA-256: 023ebb12490a077f7710a7d27857d6c71a44658db95101ee4db38809a507e813
196 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
  • 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.
  • 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://seumenha.ru/123?utm_term=what+is+difference+between+freedom+and+liberty PDF link annotation
    • http://tuvivukaroj.mygamesonline.org/84082677593.pdfIn PDF document text
    • https://damemerivojed.weebly.com/uploads/1/3/4/3/134378109/ce2fc6dac3aa9.pdfIn PDF document text
    • https://damowovevibip.weebly.com/uploads/1/3/0/9/130969764/limuwefe.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410000/normal_5fe3c350bb805.pdfIn PDF document text
    • http://lumogodasekepi.mypressonline.com/how_to_make_baby_cuddle_blanket.pdfIn PDF document text
    • http://xubanapirobula.mypressonline.com/their_eyes_were_watching_god_chapter_17-20_summary.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425483/normal_6032f96475916.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386337/normal_602b8b6b106b6.pdfIn PDF document text
    • https://givodevivunafa.weebly.com/uploads/1/3/1/8/131871579/3354951.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xekabotiwuker.atwebpages.com/sopa_de_letras_para_adultos_en_espaol_para_imprimir.pdfIn PDF document text
    • https://s3.amazonaws.com/xopugup/bleach_vs_naruto_2._4.pdfIn PDF document text
    • http://rizivubonulej.atwebpages.com/gedonupatadezosetuvus.pdfIn PDF document text
    • https://s3.amazonaws.com/wovugi/driver_asus_x455lf.pdfIn PDF document text
    • https://s3.amazonaws.com/kotidox/bisewutawinimigan.pdfIn PDF document text
    • https://s3.amazonaws.com/desekusoxi/69148966859.pdfIn PDF document text
    • http://bavatesivo.myartsonline.com/bovunedepeni.pdfIn PDF document text
    • https://s3.amazonaws.com/fadedosi/nekomemisifelanoro.pdfIn PDF document text
    • https://s3.amazonaws.com/vudivuzakal/vakapi.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_off0000d8c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8C9 5608 bytes
SHA-256: 830f5e3a6761a49732974fe117a2dd7111fcd432a321b5827d4117e3bf7eb403
font_01_sfnt_off0000ebce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBCE 10864 bytes
SHA-256: ef6ef4fb4b4d33e77079a171e78655872cde2f83bd6e65c03dfb32c6f8fa60f1

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