Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e93935ede1ac2c6…

MALICIOUS

PDF

63.6 KB Created: 2021-02-19 03:38:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 2f04186694d437066ad07dbe1e473e56 SHA-1: 2cd670674081811a15d4c455e1684abcc011d1b1 SHA-256: 8e93935ede1ac2c687ef62779f038ebd6c6e4e6ceb44ac71e3cb0e70f9ddc942
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=elements+and+the+periodic+table+crossword+puzzle+answers In PDF document text
    • http://ludugomawetus.22web.org/wukifevatiwite.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416149/normal_5ff912ff61335.pdfIn PDF document text
    • http://xijogeziku.66ghz.com/hydrogen_peroxide_3_sds_sheet.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4472486/normal_5ffc0a6558d57.pdfIn PDF document text
    • https://cdn.sqhk.co/wazafanez/1rqY0Tf/945841576.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369671/normal_5fd76b6deb8d8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://xivikinobuni.epizy.com/sumiziwimolifunikum.pdfIn PDF document text
    • https://s3.amazonaws.com/wejuvono/calculo_trabalhista_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/fukepez/89259948985.pdfIn PDF document text
    • https://s3.amazonaws.com/zubata/kinetic_friction_experiment_lab_report.pdfIn PDF document text
    • https://s3.amazonaws.com/fosawef/practice_problems_conservation_of_mass_answer_key.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b03d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB03D 5432 bytes
SHA-256: 889177420372c925b4470681871a1711dc318a5e22f755a5a9b5f3e4baf62b2f
font_01_sfnt_off0000c297.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC297 9664 bytes
SHA-256: 7a859017c53462e0d69f01921c32b9947ce8d7a88052d0fc27fc78cfe1902b0e
font_02_sfnt_off0000e2f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2F8 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c