Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a808bf5cd5de445…

MALICIOUS

PDF

65.8 KB Created: 2021-02-11 18:36:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 8afe28686ae7d7cfc91c58a9f62f1ca3 SHA-1: 99c855db3cad43caca5ff2044e32412adf6a0825 SHA-256: 7a808bf5cd5de445016c509d9daa0acf4ab4019303ae8871245cc3b1f74de6a0
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://druttle.ru/wix?keyword=diffusion+of+innovations+5th+edition+pdf+download PDF link annotation
    • https://zibiwatogotoz.weebly.com/uploads/1/3/1/1/131163514/7542641.pdfIn PDF document text
    • https://ribofefafuf.weebly.com/uploads/1/3/4/7/134770843/lerixupisovenopap.pdfIn PDF document text
    • https://sapilijufidukuw.weebly.com/uploads/1/3/4/9/134901451/6936891.pdfIn PDF document text
    • http://sandiego-podcasts.com/3633205069258oig.pdfIn PDF document text
    • http://gufutaca1.xyz/tinus3q99m.pdfIn PDF document text
    • http://mini-camera-super.club/56609623714m290d.pdfIn PDF document text
    • https://cdn.sqhk.co/tajixixejafi/jbsZQjc/the_ben_new_song_audio.pdfIn PDF document text
    • http://zdsshop.top/makalah_cephalgia1jmct.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/xuzakob/corporate_business_powerpoint_templates_free.pdfIn PDF document text
    • https://s3.amazonaws.com/rurosaveruk/samezuxuxa.pdfIn PDF document text
    • https://s3.amazonaws.com/warapagefasovi/achieve_ielts_listening_test_4_answers.pdfIn PDF document text
    • http://finubovuputok.epizy.com/fasupuximigugudavosuvo.pdfIn PDF document text
    • https://s3.amazonaws.com/midizaxopazeji/excel_vacation_schedule_template_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/lovetijif/45717144277.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_off0000c656.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC656 5308 bytes
SHA-256: 40d60c7648646f193cae7aeb3e7c16dcbacad55521702c285f68704c256ca2fd
font_01_sfnt_off0000d88a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD88A 9772 bytes
SHA-256: 5374daab4924c42cc937698a48c4ad559999197bcc319e79cd20f491c9fa1e20