Malicious PDF — malware analysis report

Static analysis result for SHA-256 f86b7bc264189be2…

MALICIOUS

PDF

79.4 KB Created: 2021-03-24 01:29:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 30e04222de529139f3014981fe2a1591 SHA-1: 53d26522234b8d3956da606ca65e81c055989e29 SHA-256: f86b7bc264189be279a032cb1df09bf6cdfc6ab12f0ee262da90ddc3fa95237e
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 0.9995

Heuristics 5

  • 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 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://bologen.ru/award?keyword=amenaza+de+aborto+gpc+pdf PDF link annotation
    • http://winovigamaj.mygamesonline.org/30120999194.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479678/normal_6017b3b3ac1a6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374532/normal_604018be319ef.pdfIn PDF document text
    • https://cdn.sqhk.co/fotenulutis/jiherjj/chocolate_candy_recipes_with_cocoa_powder.pdfIn PDF document text
    • https://cdn.sqhk.co/loziromegon/gj3h7hc/4347919534.pdfIn PDF document text
    • http://tanolugulutewu.medianewsonline.com/lavoredilekebabov.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458856/normal_60586ac4dc96e.pdfIn PDF document text
    • https://cdn.sqhk.co/gezubesekar/ihowPKU/captivating_book_study_guide.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384035/normal_602afab21ba3d.pdfIn PDF document text
    • https://cdn.sqhk.co/xejudawadoni/ib91Mhd/3043407634.pdfIn PDF document text
    • http://dorulezebum.sportsontheweb.net/casio_w-800hm-3avdf_erkek_kol_saati.pdfIn PDF document text
    • http://didazema.mypressonline.com/geometry_worksheet_answers_angles.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379720/normal_5fce76f75aea8.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/xoxaneral/35783055501.pdfIn PDF document text
    • https://s3.amazonaws.com/mosezavor/whats_calorie_surplus_mean.pdfIn PDF document text
    • http://dolanuvusipegu.myartsonline.com/broiler_farming_project_report.pdfIn PDF document text
    • http://supuwevul.atwebpages.com/what_did_joker_say_to_murray_before_he_shot_him.pdfIn PDF document text
    • http://vofolosozoz.epizy.com/wenesopig.pdfIn PDF document text
    • https://s3.amazonaws.com/bubeto/i_ready_quiz_answers_level_h_math.pdfIn PDF document text
    • http://gujodelabugujaf.rf.gd/intoxicacion_por_anticonvulsivantes.pdfIn PDF document text
    • http://gakilasefit.myartsonline.com/electronic_health_records_workload.pdfIn PDF document text
    • http://zuxekesimulir.epizy.com/psoriasiform_eczematous_dermatitis.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d888.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD888 5444 bytes
SHA-256: d790e8a60ff6c1665f2ad92a04dbe433b9ce89fc4ef604ddb015049db8c2f678
font_01_sfnt_off0000eaf9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAF9 18292 bytes
SHA-256: 827f308b3a9b1fc15e28be936ec0986debddc3cb4759a9363124b47e4b4fffc7
font_02_sfnt_off00011900.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11900 16560 bytes
SHA-256: f3fc44ee8de29e3fdef51a9acaf8289e636597c8d1d1c0135906f2c846b37edd

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