PDF malware analysis — malicious · 5549f8f35521b5d4

MALICIOUS

PDF

85.0 KB Created: 2021-02-22 07:46:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 47a5d527931ead9d9ad253307cb606d4 SHA-1: 52a71e773065afeaf94953509c65900050ab8b17 SHA-256: 5549f8f35521b5d43838020c3dfd01330f93d3a7744b40ae3fb7e87cf57c93a8

96 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file is a PDF document that contains an embedded URL disguised as a student guide answer key. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The embedded URL is the primary indicator of compromise, suggesting the document is a lure to redirect the user to a malicious site.

Machine Learning

Nyx PDF Classifier malicious score 0.9995

Heuristics 4

ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
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://maypoin.ru/wix?keyword=basic+coordinates+and+seasons+student+guide+answer+key
- http://sizijevoji.iblogger.org/62573818685.pdf
- http://butinejijobu.iblogger.org/51890193772.pdf
- http://serikanipesemo.iblogger.org/bhakta_tukaram_cinema_songs.pdf
- http://sberin.xyz/95317348055i9utb.pdf
- https://static.s123-cdn-static.com/uploads/4378175/normal_5fccfe6aaf0bc.pdf
- http://busforpay.online/gejinufowo1g7y4.pdf
- https://cdn-cms.f-static.net/uploads/4470552/normal_6011818384f9c.pdf
- https://cdn-cms.f-static.net/uploads/4444096/normal_602e0c9fced13.pdf
- http://silver35.ru/google_digital_garage_certification_final_exam_answers7u8k4.pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://s3.amazonaws.com/remavuj/al_nahar_news.pdf
- http://giratas.epizy.com/the_apostles_creed_prayer.pdf
- https://s3.amazonaws.com/xenavuxa/91193274970.pdf
- https://s3.amazonaws.com/pusixa/desawitupopizufuxavegexi.pdf
- http://kowelakava.rf.gd/blah_blah_blah_lyrics.pdf
- http://zonigeki.rf.gd/how_can_i_inspire_my_students.pdf
- http://luxizetugo.epizy.com/famebevegowowofizowutuz.pdf
- https://s3.amazonaws.com/wotodedaruzuk/wupojewotapof.pdf
- https://s3.amazonaws.com/peveziwoguxuzam/39517519281.pdf
- https://s3.amazonaws.com/xukonakefules/geographical_information_system_course_in_uk.pdf
- https://s3.amazonaws.com/sefiwegegagu/macgyver_2016_episodes_guide.pdf
- http://faxumev.epizy.com/16253020998.pdf
- https://s3.amazonaws.com/bejeseja/types_of_figurative_language_hyperbole.pdf
- http://www.w3.org/1999/02/22-rdf-syntax-ns#
- http://purl.org/dc/elements/1.1/
- http://ns.adobe.com/pdf/1.3/
- http://ns.adobe.com/xap/1.0/
- http://ns.adobe.com/xap/1.0/mm/
- http://ns.adobe.com/xap/1.0/rights/
- http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00010e82.bin` `82c9b95670b68f1377afaf4b6c3635ab3203189b4487f8e112f7a483b8da619b`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10E82	5380 bytes
`font_01_sfnt_off000120fc.bin` `f5d6b770cd93a555173343f330b368978e4784b791d4c92f4afca3c21fe502f0`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x120FC	10852 bytes

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