Malicious PDF — malware analysis report

Static analysis result for SHA-256 7082cb5a9e3a8860…

MALICIOUS

PDF

73.0 KB Created: 2021-02-26 01:24:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: e3719037e80509791fc858f342f3fbcb SHA-1: 04651c764210f2ad7741dffe7d8cb8fff878cfa1 SHA-256: 7082cb5a9e3a8860bf44343ac9ea3296e9064f5723b095ff1b302003cf219d65
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://crophysi.ru/wb?keyword=huckleberry%20finn%20description%20in%20tom%20sawyer In PDF document text
    • https://cdn-cms.f-static.net/uploads/4416494/normal_600dc3046e645.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4499299/normal_5fe50aa985ef0.pdfIn PDF document text
    • http://thailandlove.site/oreck_dualmax_air_purifier_with_helios_shield_review1cjxu.pdfIn PDF document text
    • http://the-glow.ru/wepogurexodasenidipejukoycjpn.pdfIn PDF document text
    • http://apparentlyopt.com/59057783526kbo6s.pdfIn PDF document text
    • http://bamefidev.mygamesonline.org/attack_on_titan_manga_ending_theory.pdfIn PDF document text
    • http://junumidutuzakox.getenjoyment.net/nifowevunufobixo.pdfIn PDF document text
    • http://dress-russia.ru/timuso37ow4.pdfIn PDF document text
    • http://mobufuwiwid.medianewsonline.com/wiwuz.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/taguxif/cv_template_design_freepik.pdfIn PDF document text
    • https://s3.amazonaws.com/sojaxub/xeluw.pdfIn PDF document text
    • http://bogalibamadom.myartsonline.com/logical_problem_solving_techniques.pdfIn PDF document text
    • https://s3.amazonaws.com/satuja/rukizo.pdfIn PDF document text
    • https://s3.amazonaws.com/sisaxu/29261992427.pdfIn PDF document text
    • https://s3.amazonaws.com/vufuzewasi/xbox_360_controller_for_pc_wired.pdfIn PDF document text
    • https://s3.amazonaws.com/vonutavekip/simple_business_case_template_nz.pdfIn PDF document text
    • https://s3.amazonaws.com/tomaxade/parallel_lines_and_transversals_answer_key.pdfIn PDF document text
    • https://s3.amazonaws.com/pekatikisuruki/pedukaluvetozetozusek.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_off0000e003.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE003 5660 bytes
SHA-256: 9765b0f6a65049d09b48ef524852ef18a0b0da0d39fdeff8d247a0801c702d69
font_01_sfnt_off0000f33c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF33C 10516 bytes
SHA-256: 6fe35f77ab4606c14f4400f363b5d500e32573d7b59e4e6643d66a874ed792ed