Malicious PDF — malware analysis report

Static analysis result for SHA-256 76feb4e736282166…

MALICIOUS

PDF

68.0 KB Created: 2021-03-10 16:08:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: 95bb08e96f64301da38026d55966b9f5 SHA-1: b6bef2860387835d2b639662add7dc344584064b SHA-256: 76feb4e73628216634fab750ebdc93cf83af3a44258ba88b118f989e24ff430e
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many of which are part of a link farm designed to appear as legitimate documents. The primary URL, 'https://seumenha.ru/wix?keyword=realidades+1+guided+practice+workbook+pdf', suggests a lure related to educational materials. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware distribution.

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 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.
  • 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/wix?keyword=realidades+1+guided+practice+workbook+pdf PDF link annotation
    • https://rikatawifusozib.weebly.com/uploads/1/3/1/4/131409861/02e06e3a81ad86d.pdfIn PDF document text
    • http://copyright-central-media.com/bojuvipisovoxupasoxowe6bcas.pdfIn PDF document text
    • http://meblik.su/core_cal_bridge_for_office_365_from_sak4lfv.pdfIn PDF document text
    • https://dozexida.weebly.com/uploads/1/3/4/5/134590021/387069.pdfIn PDF document text
    • http://goladelexugezi.sportsontheweb.net/bank_of_baroda_balance_sheet.pdfIn PDF document text
    • https://forabuluzasojar.weebly.com/uploads/1/3/5/3/135303956/zuxazenef_wanawo_sitafogum_visufefes.pdfIn PDF document text
    • http://riwotivadejud.sportsontheweb.net/95306075879.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://7a579b3f-ce96-4c66-abdc-991530493d29.filesusr.com/ugd/010c6b_302eddc363774c2b86daf188c8615f96.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/rebesudanolo/jitav.pdfIn PDF document text
    • https://4993f9ff-345c-4c03-a8ec-d4f8dac664d6.filesusr.com/ugd/debbe1_4889bbc7337b4b5c915130558df2b966.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/nasitevu/adverbial_phrases_worksheet_tes.pdfIn PDF document text
    • https://bf23b77b-49a9-4bef-a898-a03cfb94aefa.filesusr.com/ugd/134172_4177a1f4de6f43c59ddbd97d5011ab9c.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/223d5c23-930f-4671-8ec9-09b9dcf1851e/59315100769.pdfIn PDF document text
    • https://s3.amazonaws.com/wazorixekunafob/lefirokirabatif.pdfIn PDF document text
    • https://s3.amazonaws.com/tutapaxi/54434027441.pdfIn PDF document text
    • https://6cb1c90e-07cf-4522-b85d-4edd8abc33c8.filesusr.com/ugd/0c41e7_1225b6cbd784488c8527558a2044d5c7.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/3c6bc893-2d44-436e-a38f-bef7c5c59f70/how_do_i_get_food_safety_certification.pdfIn PDF document text
    • https://s3.amazonaws.com/boxalewijim/2005_buick_lacrosse_cx_owner_s_manual.pdfIn PDF document text
    • http://mifotabelimudon.myartsonline.com/zunixijazapalawegofezo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5c3be763-cb60-4d45-9382-de2e5dfd5580/why_do_we_study_human_geography.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_off0000c9b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9B9 5676 bytes
SHA-256: 4e1f061cae2e313fb160f488e997ac6a66deccc79ed3f92122bd002d5f061d1d
font_01_sfnt_off0000dd32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD32 10512 bytes
SHA-256: 940c74cae766f469f93a4f9e4411bc31012c6d0d5a6a82cd296e2d23d7b2c0bf

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