Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebe16597ea762119…

MALICIOUS

PDF

70.6 KB Created: 2021-02-14 16:27:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: b23defc7072fa2e280f5e8be3eccba59 SHA-1: dab0d3bb40a55c64a7c12684c4bcaf01c4f3c917 SHA-256: ebe16597ea76211942d9543503e0000d4bcf0e623cc9e12add8ceb6390a0a24a
254 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
  • 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.
  • 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/aws?utm_term=barcelona+vs+villarreal+4-+4 In PDF document text
    • https://rojuligu.weebly.com/uploads/1/3/0/9/130969709/suminu-nozib.pdfIn PDF document text
    • https://juzudibat.weebly.com/uploads/1/3/4/3/134328144/didipitiradur.pdfIn PDF document text
    • http://idealslim-italiaoficial.site/kifagurelegex36ee.pdfIn PDF document text
    • http://setixin.iblogger.org/bimubifakiwe.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4479905/normal_5ffd0ac2c115a.pdfIn PDF document text
    • http://daimontimur.org/duzisujeksow4.pdfIn PDF document text
    • http://deine-gabe.com/rvunl_informatics_assistant_answer_key9wp27.pdfIn PDF document text
    • http://allwoman.site/electric_machinery_fitzgerald_downloez7wv.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rebamasisagu.epizy.com/68957712925.pdfIn PDF document text
    • https://s3.amazonaws.com/lomiwexuva/acog_preeclampsia_guidelines_2016.pdfIn PDF document text
    • https://s3.amazonaws.com/suxugipipolazog/40650714943.pdfIn PDF document text
    • https://s3.amazonaws.com/suzujewa/sesib.pdfIn PDF document text
    • http://gazezubutajon.rf.gd/senorita_song_piano_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/feseni/firodasemimozinefezava.pdfIn PDF document text
    • https://s3.amazonaws.com/wibedubosateg/administracion_publica_mexico.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_off0000d656.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD656 5024 bytes
SHA-256: 6a640656702085a38a8531ffaf9d1f8b1fad3af06811b8908f88f6ecef99f054
font_01_sfnt_off0000e78b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE78B 11128 bytes
SHA-256: 490ad11a8f199b46d303f460c1860cb1c8d7d19f1c1717c29cc44be2b61c888f