Malicious PDF — malware analysis report

Static analysis result for SHA-256 26005d073ddbf055…

MALICIOUS

PDF

86.5 KB Created: 2021-09-10 00:02:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c821c4d5ef8102e5fcf38bd5327fc0b3 SHA-1: 4359d67f8172f1396e723c24cb20f0904909796d SHA-256: 26005d073ddbf05596634b21cf1f1867e0e47185e43360e63468db4968fd8ceb
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, a common technique for executing malicious code within documents. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the PDF is designed to host numerous links, likely to further malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, specifically phishing or trojan activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

Heuristics 6

  • 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 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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 http://portamarioarchitetto.eu/userfiles/files/rolimuwadijasevomew.pdf
    • http://zoop-tech.com/ckfinder/userfiles/files/loranet.pdf
    • http://hiroshima-teishaku.com/userfiles/file/17658047390.pdf
    • http://akifkasaboglu.com/esatfisek/images_upload/files/pevesutulepokememugefo.pdf
    • https://accuratesearch.com/userfiles/file/5381453024.pdf
    • http://binhchuachay.info/Images_upload/files/93751057196.pdf
    • http://huzatfokozo.hu/editor_up/ditatilokaret.pdf
    • https://www.domosystem.gr/ckfinder/userfiles/files/86379379580.pdf
    • http://refah4ter.info/basefile/hotelrefah4terir/files/puxibufibegiked.pdf
    • http://www.sas.edu.mn/ckfinder/userfiles/files/21097932566.pdf
    • http://astmasme.com/userData/board/file/69618060819.pdf
    • http://topoint.net/userfiles/fckFile/20210904195025.pdf
    • http://wcsps.com.tw/ckfinder/userfiles/files/kidelijuzuwiwepapose.pdf
    • http://shinex-auto.com/userfiles/file/1615213291.pdf
    • https://chulintemple.org/CKEdit/upload/files/mibupoxenajuninipijagote.pdf
    • http://cps-mbstu.edu.bd/app/webroot/js/ckfinder/userfiles/files/bofejubokizafakememobujas.pdf
    • http://baove24h.info/upload/files/xebutu.pdf
    • https://limsurempat.com/contents/files/73917486809.pdf
    • https://swaarm.de/app/webroot/upload/files/narevob.pdf
    • https://sacc-la-chaux-de-fonds.ch/fichiers/file/rejiwewelazalepud.pdf
    • https://vinocastillo.hu/editor_up/vukerofigobinijesose.pdf
    • http://www.enjoyvaltellina.it/admin/ckfinder/userfiles/files/85056477860.pdf
    • http://ohadalegistrocbarter.com/ckeditor/uploads/files/4575380171.pdf
    • https://flardochform.se/userfiles/file/tazudujelepelojuziremup.pdf
    • https://digiconelectronics.com/media/99718832866.pdf
    • http://speednewslive24.com/assets/ckfinder/core/connector/php/uploads/files/lufedif.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=wwe+game+for+android+offline
    • 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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f167.bin
954ca6aa3084167928201c6455934bdddca0f429f5e41246457cff32fd72a462		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF167 10508 bytes
font_01_sfnt_off0001090e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1090E 16792 bytes
font_02_sfnt_off00012120.bin
0fd545f39856fe4c2cdbc29d996d89703edd817de23101577249f0cd6869acf1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12120 16664 bytes

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