Malicious PDF — malware analysis report

Static analysis result for SHA-256 90f288559e7525ff…

MALICIOUS

PDF

71.4 KB Created: 2021-02-13 05:59:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 57314f6a100604f14b477288efbac4e4 SHA-1: 5689fb7ef411e5ca5a4aaa539534e7f2988fac29 SHA-256: 90f288559e7525ff47858f5ce9f5504a4027d2ff9db5d75a5a93aaa2c0274a7b
134 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • 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=fallout+4+modding+guide+2017 In PDF document text
    • https://cdn.sqhk.co/vuwonesi/PIjfEsy/f1_drivers_kneeling.pdfIn PDF document text
    • https://cdn.sqhk.co/tasaxasup/jp4gbje/61747714825.pdfIn PDF document text
    • https://cdn.sqhk.co/verexoleki/zhfcXhb/roblox_toys_target.pdfIn PDF document text
    • http://salonhq.xyz/feeding_guidelines_for_3_month_oldby8c1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457560/normal_601e82e0cdb4e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375525/normal_601bfc95adb80.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/paxunu/taserifivosigofizab.pdfIn PDF document text
    • https://s3.amazonaws.com/niwotipugonuvoz/uc_browser_9._5_java_jar.pdfIn PDF document text
    • https://s3.amazonaws.com/zagubip/cabin_crew_interview_tips_and_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/lanorolowu/h2020_coordinators_day_amendments_and_reporting.pdfIn PDF document text
    • https://s3.amazonaws.com/rudelazifizuvo/58001218371.pdfIn PDF document text
    • https://s3.amazonaws.com/jeromisixinolib/business_intelligence_tools_for_small_companies.pdfIn PDF document text
    • https://s3.amazonaws.com/difigomisosak/restaurants_guide_michelin_paris.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_off0000dabd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDABD 5320 bytes
SHA-256: 6450487c19a1b11f85d6f0b6c4a5edfea5c3b7de5dce0c6a4a51d8ed03614d67
font_01_sfnt_off0000ecde.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECDE 10596 bytes
SHA-256: 2daec5e5f3f60ee301f4fbae7cc881e3deda97caff2482a6a10311fd37119f81