Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d96b0a53cc67bca…

MALICIOUS

PDF

76.2 KB Created: 2021-02-17 04:56:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: f54c9eab8e62d09dbb4209db68cbd37a SHA-1: 722f474ad463efa7adc5d208e9bbedef3ca1f1de SHA-256: 8d96b0a53cc67bca1a86f271e569fbcbe0f4628836db253d55e57aaa6d3249d2
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://leonvi.ru/aws?utm_term=spanish+vocabulary+quiz+free PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4413707/normal_602b89cfd1e8c.pdfIn PDF document text
    • https://fojevatiseme.weebly.com/uploads/1/3/4/4/134400043/338221.pdfIn PDF document text
    • http://pubedetavilew.22web.org/vuzofop.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458404/normal_600a4b04d3207.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/vuraradaso/industrial_wastewater_treatment_methods.pdfIn PDF document text
    • https://s3.amazonaws.com/pululusodogi/beamng_drive_non_steam.pdfIn PDF document text
    • https://s3.amazonaws.com/jukoxisojow/xomabawipalonefifulirin.pdfIn PDF document text
    • https://s3.amazonaws.com/ropidadegaxut/chhichhore_songs_webmusic.pdfIn PDF document text
    • https://s3.amazonaws.com/tobovunoberiki/94792744433.pdfIn PDF document text
    • http://jimanujomubil.epizy.com/aafp_isfm_feline_friendly_handling_guidelines.pdfIn PDF document text
    • http://mekidojakad.rf.gd/69556708478.pdfIn PDF document text
    • https://s3.amazonaws.com/megodipewukitoj/latest_telugu_2019_movies_jio_rockers.pdfIn PDF document text
    • http://kixurazo.rf.gd/56316742110.pdfIn PDF document text
    • https://s3.amazonaws.com/sesafefanulokam/bitmap_to_drawable_resource_android.pdfIn PDF document text
    • https://s3.amazonaws.com/posufij/87897279302.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_off0000ea0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA0D 5684 bytes
SHA-256: 248e2f032c7485adcd2a264b3a8b5d6aab9d5830f2e208d7123c59c11bb0cc0a
font_01_sfnt_off0000fd6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD6D 11764 bytes
SHA-256: 7cefb42b8637b702a5e2ea417fbfa74a64068620f897c3879fc1c3a8537a3b48