Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ef024a62d557a40…

MALICIOUS

PDF

70.7 KB Created: 2021-02-14 18:16:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: be5ccb769e9c3b7b1375b70b52d45547 SHA-1: 50acd736f2a03b23923063da14f8c00018807d54 SHA-256: 7ef024a62d557a402a5dbeac7c1fc4d90ff08eb6b1f272f1cd5ddf9647d90ceb
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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=bolanos+driving+school In PDF document text
    • https://cdn.sqhk.co/mujawiru/hgcnygg/3411174811.pdfIn PDF document text
    • https://cdn.sqhk.co/lexebogefaj/e0Mlrhh/carmageddon_los_angeles.pdfIn PDF document text
    • http://zobebukore.22web.org/fact_value_policy_worksheet_answers.pdfIn PDF document text
    • http://itwow.info/zekumonutalut2kf05.pdfIn PDF document text
    • http://thesimplycompleteseries.com/31827541360u0ge.pdfIn PDF document text
    • https://cdn.sqhk.co/vibesadebo/icFhbgj/882795066.pdfIn PDF document text
    • http://file-id.ru/gofivoxonaji5q0f5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388282/normal_6015d9df7f369.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366055/normal_6026174f47ff1.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/zobuwubedak/dad_s_army_radio_episode_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/likerajatob/redujifogezomofevowiko.pdfIn PDF document text
    • https://s3.amazonaws.com/wazorixekunafob/magnesium_oxide_lab_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/pezofut/sungrow_50kw_inverter_datasheet.pdfIn PDF document text
    • https://s3.amazonaws.com/viboxikuz/itunes_cracked_apk_android.pdfIn PDF document text
    • http://kotutuvotijol.rf.gd/schneider_electrical_installation_guide_2019.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_off0000d875.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD875 5308 bytes
SHA-256: 5983dc21b7a57626f7b7d8ca86d2cfb19a9fcae02358aedc791fc710fbb59dad
font_01_sfnt_off0000ea86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA86 10412 bytes
SHA-256: aac010d32978a20e47d07911f3dbec3c3cf402206bc04872085c26de002da98e