Malicious PDF — malware analysis report

Static analysis result for SHA-256 8139d7dc468b4cf8…

MALICIOUS

PDF

80.5 KB Created: 2021-03-17 00:48:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: eb0bb56dbfd6c8d363ca65a18403fb82 SHA-1: 2ab32bb1f5650ac3eb4210a2d64cbe6d4336bab9 SHA-256: 8139d7dc468b4cf89e29c517ad4badeb7864b74446e1dc95ce4483affdd1bb77
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-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://seumenha.ru/strik?utm_term=epson+surecolor+p800+ink+refill PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4450138/normal_6014424d36807.pdfIn PDF document text
    • https://xaxomawiso.weebly.com/uploads/1/3/5/3/135329970/6137454.pdfIn PDF document text
    • https://cdn.sqhk.co/dukosisevu/1k3hgVb/xylophone_ringtone_download_iphone.pdfIn PDF document text
    • https://cdn.sqhk.co/nojedajoze/KKFWib6/samsung_blu_ray_player_analog_audio_output.pdfIn PDF document text
    • https://pesuwoleze.weebly.com/uploads/1/3/5/2/135295903/7359743.pdfIn PDF document text
    • http://lnstagram-copyright-supports.com/anatomy_for_sculptors_understanding_the_human_figure0jep9.pdfIn PDF document text
    • https://kagopibuxewiki.weebly.com/uploads/1/3/1/3/131398156/benozode_wozofatal_xuxigirip_fevaliliti.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487382/normal_60342e898b178.pdfIn PDF document text
    • http://susurrus.space/bodybuilder_arnold_schwarzenegger_photosvimff.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412408/normal_602b7bf2a8d87.pdfIn PDF document text
    • https://sexaximelukifa.weebly.com/uploads/1/3/1/0/131069869/0f74b.pdfIn PDF document text
    • http://viewcreditscore.info/excel_vba_define_workbook_path58bla.pdfIn PDF document text
    • http://itdomen.fun/can_you_day_trade_stocks_in_a_roth_irakthzq.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408704/normal_5fece5f09d656.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484118/normal_5fd77aef1c33b.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/5e796252-e380-47a6-bd2c-374f116a270a/giwuzebekep.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/86e6ba4d-e592-41bf-837a-059447cc938c/3_beep_motherboard_code.pdfIn PDF document text
    • https://7ed754b6-a209-4558-9281-0032c7ee8ade.filesusr.com/ugd/4329d7_546da12c9a16475aa5eaeeef5e6e3aef.pdf?index=trueIn PDF document text
    • https://33b7cf8b-1cb2-46d9-9063-17e97cba5e80.filesusr.com/ugd/9edd50_e6d80ea97d6e49dfb7a92b955c47837f.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef15bb78-e163-4fd5-9d77-963e7614068d/what_is_non_realism_in_theatre.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_off0000fcbc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCBC 5156 bytes
SHA-256: 77989dff9e9f8d7bbec52081b7cbfa234587a16c76f1aebfa9a20b29352c8c48
font_01_sfnt_off00010e66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E66 11284 bytes
SHA-256: aaf7e4597842eee60fed363997b3bdcf2f7b3e404b326634b4d141e214e3a9e9

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