Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5722e7fac417c42…

MALICIOUS

PDF

72.5 KB Created: 2021-04-01 21:38:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: d429dc545222ac6fb8459aebf08705a3 SHA-1: 50a1bcefd9c948b48799ef109f1fa8e1b7ae1667 SHA-256: d5722e7fac417c42af3c85ae8e60f4fcafcc15b787a5854206261e72a17a32f3
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://baarspo.ru/wix?keyword=ventajas+y+desventajas+de+la+simulacion+continua PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4486565/normal_604dc54f5fa30.pdfIn PDF document text
    • https://cdn.sqhk.co/badalozebale/hsjjjhh/11361756560.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404975/normal_5fefe5650c9eb.pdfIn PDF document text
    • https://cdn.sqhk.co/voguzasijur/jcUgdhe/xukuxopuz.pdfIn PDF document text
    • http://fibiver.mygamesonline.org/letter_tracing_book_for_preschoolers.pdfIn PDF document text
    • https://cdn.sqhk.co/kenixidoxexi/ghOsFic/minecraft_mob_battle_arena_map_1._7._10.pdfIn PDF document text
    • https://cdn.sqhk.co/gosukutusu/haggohe/xejefotoxudusolufovowam.pdfIn PDF document text
    • https://cdn.sqhk.co/xekemini/nIgiAJJ/silicon_valley_tv_show_season_6_release_date.pdfIn PDF document text
    • http://tifusavegapawuf.mygamesonline.org/63831291396.pdfIn PDF document text
    • https://cdn.sqhk.co/zagakobafot/liehjKY/amazon_alexa_deals_of_the_day.pdfIn PDF document text
    • https://cdn.sqhk.co/defegitip/5XXgfvd/bass_pro_shop_san_jose_boats.pdfIn PDF document text
    • http://geloritiveda.mygamesonline.org/71457344678.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/be0bf6f3-37a1-4a3d-a539-10d135ff0be4/77274995229.pdfIn PDF document text
    • http://xulelaperimiku.epizy.com/update_gb_whatsapp_6._50.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e1816e6-447c-4356-ac73-6ce62d76a111/the_tempest_sparknotes_translation.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/70e99dfd-cf1e-47e9-9d5a-7c3f80b4af2e/hard_sat_math_2_questions.pdfIn PDF document text
    • http://taxopewik.rf.gd/93619472287.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_off0000dcb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCB6 5192 bytes
SHA-256: f3b00b7caf754043f64d19d54600fbc68a3af16a63f30306f4617ba4b995bc66
font_01_sfnt_off0000ee67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE67 11172 bytes
SHA-256: 50b5c8fea60b8548f993792190ed98e9bfa104410037f6c34290ffe96f7738e4

Open this report in the interactive analyzer, or submit your own file for analysis.