PDF malware analysis — malicious · 89570eae59d3074d

MALICIOUS

PDF

78.0 KB Created: 2021-03-01 01:02:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 7870e6f59dfcdf2ea0863da6f23d81c7 SHA-1: 5c6716d4246e095a84153ba2dd4f301c67d774e1 SHA-256: 89570eae59d3074d4df33195a9532cefcf88aa7b74638172320e75e0a32264fa

96 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was detected as malicious by ClamAV and a machine learning classifier. It contains an embedded URL that points to a suspicious domain, likely serving as a lure for phishing or malware distribution. The document body, though heavily obfuscated, suggests a theme of educational worksheets, which is a common social engineering tactic.

Machine Learning

Nyx PDF Classifier malicious score 0.9998

Heuristics 4

ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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://jottigo.ru/wix?keyword=types+of+circuits+and+ohm%2527s+law+worksheet+answers
- https://cdn-cms.f-static.net/uploads/4460471/normal_602767806a75b.pdf
- https://cdn.sqhk.co/tavikagisato/h8pDdge/bipasokozutasizulepegaju.pdf
- https://cdn.sqhk.co/vuwipabobatu/oHijzOH/excursiones_cruceros_mediterraneo.pdf
- https://cdn-cms.f-static.net/uploads/4392652/normal_6018c08d9d08f.pdf
- http://tusiteguluvora.getenjoyment.net/xolala.pdf
- https://cdn.sqhk.co/kovajivika/jVgdhhn/foped.pdf
- https://cdn-cms.f-static.net/uploads/4489980/normal_600d97a83fb5c.pdf
- https://cdn-cms.f-static.net/uploads/4423171/normal_601861677215f.pdf
- https://cdn.sqhk.co/posojuvapono/5iFK5ii/tedurudukokeramivuwage.pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://s3.amazonaws.com/lomogas/belogufejeta.pdf
- https://s3.amazonaws.com/suxuzubojut/definicion_de_armario_en_informatica.pdf
- https://s3.amazonaws.com/mesixadelomomo/formule_excel_pour_arrondir_au_millier_suprieur.pdf
- https://s3.amazonaws.com/pomaxa/zonilekigukamu.pdf
- https://s3.amazonaws.com/vaxebisapesi/28021397712.pdf
- https://s3.amazonaws.com/biwubeleba/zuvizolasovexedinodilij.pdf
- http://luvabokinoleg.onlinewebshop.net/bolens_tractor_for_sale.pdf
- https://s3.amazonaws.com/savifin/dslr_camera_starter_guide.pdf
- http://kisalonokexiwi.atwebpages.com/rilimubevo.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_off0000f17d.bin` `8618542a3f2f7883cdec43aeaa89c96db8f0a573928bd1a733ed2047c9a34b81`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF17D	5636 bytes
`font_01_sfnt_off0001049a.bin` `343af7451ba274f3a8c69a2fa3085e9f45f27c4612c581520a1fa75a9e4c9cbc`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1049A	11204 bytes

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