Malicious PDF — malware analysis report

Static analysis result for SHA-256 75548aeef8cb823a…

MALICIOUS

PDF

70.9 KB Created: 2021-02-27 05:17:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 2db026701c3e2af967bbcd60bb4df417 SHA-1: 34048c773ef064c8308f13cb20237cfe7a029a41 SHA-256: 75548aeef8cb823adb1cbb55bf226bcbb9f583f77efeac7c28c3eb480660e6fd
254 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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.
  • 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/award?keyword=what+is+blue+green+eye+color+called In PDF document text
    • https://cdn.sqhk.co/zevukodixu/Ta64ihR/54706585796.pdfIn PDF document text
    • https://cdn.sqhk.co/xexerekija/dgiig4U/10037986336.pdfIn PDF document text
    • http://gowanenutik.mypressonline.com/kisowife.pdfIn PDF document text
    • https://vawevoza.weebly.com/uploads/1/3/1/4/131482963/jipitunawitipaxotu.pdfIn PDF document text
    • http://presente-top.store/41171942515lo5ng.pdfIn PDF document text
    • http://mp4.design/nirok1nvji.pdfIn PDF document text
    • http://meblik.su/the_far_side_of_the_moon_were_able_to_see_the_sunc2u5t.pdfIn PDF document text
    • https://cdn.sqhk.co/wanoziku/wPjbni0/11090069503.pdfIn PDF document text
    • https://cdn.sqhk.co/rurokusulos/ggehcje/u_mobile_prepaid_roaming_activation.pdfIn PDF document text
    • http://triple-doska5.club/import_keynote_to_slidesu8w8z.pdfIn PDF document text
    • http://zobotalemogi.sportsontheweb.net/organisms_in_an_ecosystem_compete_only_for_food.pdfIn PDF document text
    • https://cdn.sqhk.co/zuretagugaf/jihaogi/39880847282.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/zukogi/dyson_v6_absolute_battery_problems.pdfIn PDF document text
    • https://s3.amazonaws.com/juvosi/electronic_ignition_system_using_contact_breaker.pdfIn PDF document text
    • http://vorisenunajix.myartsonline.com/business_mathematics_course_learning_outcomes.pdfIn PDF document text
    • https://s3.amazonaws.com/wopari/mammogram_report_sample.pdfIn PDF document text
    • https://s3.amazonaws.com/tinivukedeta/online_report_citation_apa.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_off0000d7ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7FF 5456 bytes
SHA-256: 3cf63525de371f42356c7eea73444fe96f7a395048d1f4f710e45c39c99a5ce0
font_01_sfnt_off0000ea94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA94 10592 bytes
SHA-256: 18fe24a97197295451858016dcb774a0eb0064b79c1a87a0f024e2d1e04661bf

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