Malicious PDF — malware analysis report

Static analysis result for SHA-256 de596397ff6e62ec…

MALICIOUS

PDF

70.6 KB Created: 2021-02-07 23:02:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 0f39753aca4711e6e96483771d013ad1 SHA-1: f8f3795d2ca9f6f39dd6bd9014bfba87e9c746d9 SHA-256: de596397ff6e62eccf97b3e98692b3e41fa422efbc2eb00d55d325c423f70931
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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/wb?keyword=sap%20analysis%20for%20office%20administrator%20guide PDF link annotation
    • http://duzegipim.22web.org/elisha_bible_worksheets.pdfIn PDF document text
    • https://wurilulisewanid.weebly.com/uploads/1/3/4/7/134728532/finuzukezapiz_zosotutikidu.pdfIn PDF document text
    • https://likizosuzi.weebly.com/uploads/1/3/4/8/134886942/4929860.pdfIn PDF document text
    • https://tozisodije.weebly.com/uploads/1/3/4/4/134486105/1611834.pdfIn PDF document text
    • https://fabebebu.weebly.com/uploads/1/3/2/7/132740756/8a6f6a9a933.pdfIn PDF document text
    • http://zijogodakenanaf.22web.org/asana_meeting_templates.pdfIn PDF document text
    • https://dunewalowipeli.weebly.com/uploads/1/3/1/8/131856746/3336325.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496014/normal_5fe61b0560195.pdfIn PDF document text
    • https://mabamigetope.weebly.com/uploads/1/3/4/4/134493328/d3a113.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gikisomu.epizy.com/tell_us_about_yourself_interview_best_answer.pdfIn PDF document text
    • https://s3.amazonaws.com/wazorixekunafob/wifi_splash_page_template.pdfIn PDF document text
    • https://s3.amazonaws.com/fejenijovekozu/12537690661.pdfIn PDF document text
    • https://s3.amazonaws.com/wovugi/15462943767.pdfIn PDF document text
    • http://zotijoxamofos.epizy.com/marketing_plan_template_for_new_product.pdfIn PDF document text
    • https://s3.amazonaws.com/tufujifinobiro/uc_browser_for_macbook_pro.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_off0000d60f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD60F 5680 bytes
SHA-256: 36e9a951a5fec7a7f8c3bc6ad201394f80d038b14a3a8b9658e98ce385eeaf85
font_01_sfnt_off0000e95f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE95F 10540 bytes
SHA-256: 656b2c72fb276a55e3f103c4930e22117e414eff9b859c107a380ff9e7df31fe