Malicious PDF — malware analysis report

Static analysis result for SHA-256 9454bad9a402c903…

MALICIOUS

PDF

90.9 KB Created: 2021-03-28 23:31:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 8be2aedc25c78d4d3d169373905fcd8e SHA-1: 23315fc3ae89e1891787822ae083ddeff6eb3add SHA-256: 9454bad9a402c903fa3973f22f2ef404026193ba44c63cffccecbff7a7228ae7
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file is a PDF document that contains a lure related to dinosaurs, likely to trick users into clicking a link. The PDF_SEO_UTM_REDIRECTOR_LINK heuristic and the embedded URL point to a redirector hosted on 'soxebez.ru', which is indicative of a phishing or scam attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for credential harvesting or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://soxebez.ru/wix?keyword=eustreptospondylus+dinosaur+king PDF link annotation
    • https://cdn.sqhk.co/regomesu/dyZEhhR/melife.pdfIn PDF document text
    • https://cdn.sqhk.co/fejisunez/b00ijig/laser_overload_build_level.pdfIn PDF document text
    • https://cdn.sqhk.co/kugefiruxat/6g0giih/carrom_board_full_size_price.pdfIn PDF document text
    • http://jesubenodewopob.22web.org/unilever_bursary_application_forms_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/fesakesovoka/bhi8mhh/sisewenakam.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367311/normal_605994c9f0324.pdfIn PDF document text
    • https://cdn.sqhk.co/rajemaramiw/Vj1ihcM/monster_jam_truck_toys_remote_control.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479942/normal_6054c41f253d6.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
    • https://s3.amazonaws.com/ribowexulo/sigofo.pdfIn PDF document text
    • https://s3.amazonaws.com/bagisi/62576966961.pdfIn PDF document text
    • https://s3.amazonaws.com/muwemivumazulax/html5_css_table_template.pdfIn PDF document text
    • https://s3.amazonaws.com/rewepalazamiso/vizemuzoduzij.pdfIn PDF document text
    • https://s3.amazonaws.com/pasawe/25743714028.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d3c1b655-bd00-4e60-9516-c89ea05ff2dc/53347321415.pdfIn PDF document text
    • http://lugukejuraxa.rf.gd/experienced_nurse_resume_template.pdfIn PDF document text
    • https://s3.amazonaws.com/nisoxow/que_es_la_bacteria_salmonella.pdfIn PDF document text
    • https://s3.amazonaws.com/vixuwogetiv/crawl_movie_imdb_parents_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/36bd350a-6f02-49d5-ab81-65cfef82c3cb/roxubek.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010529.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10529 5132 bytes
SHA-256: 46ca02e99ebf359ff78230cdf849b57aac0255cd769052e132d9b3112a04a542
font_01_sfnt_off000116b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116B3 10672 bytes
SHA-256: e5ccc5877a72bcf0cbba5876d770559212df95b0dece6a3972f286ce1af7da42
font_02_sfnt_off00013b3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B3D 16108 bytes
SHA-256: 71727a5f61945565ba925525dc5e97fc15060b6b47aecd4c775f73df5581ac1a
font_03_sfnt_off0001500e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1500E 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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