Malicious PDF — malware analysis report

Static analysis result for SHA-256 a32724a7be30c844…

MALICIOUS

PDF

81.1 KB Created: 2021-09-13 14:57:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 9c881fe69869627ee56cd95d4e580ac1 SHA-1: 9da23e3080406d7ca8e8e314b27939ce9ab05b8b SHA-256: a32724a7be30c84470d3cfa547c6be0ba2dd396a39b5195624b3e413aa06145c
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and multiple external URIs pointing to disposable hosting, strongly indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection further support its malicious nature. The embedded JavaScript likely facilitates the redirection to malicious sites or the download of further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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 https://allytemp.ru/uplcv?utm_term=play+pokemon+light+platinum+online PDF link annotation
    • http://ramseier-appenzell.ch/elrada/js/ckfinder/userfiles/files/58150864803.pdfIn PDF document text
    • http://dreiseengrundschule.de/files/lebolovokatujixiditof.pdfIn PDF document text
    • http://sitoad.com/bbqjoekey/files/202109122045465937.pdfIn PDF document text
    • http://rklatex.com/userfiles/file/xakaduwada.pdfIn PDF document text
    • http://chinamakina.com/userfiles/file/54432953866.pdfIn PDF document text
    • http://fishngrill.iorderfoods.com/uploads/files/polekowixawavafikev.pdfIn PDF document text
    • http://tjsijiqing.com/ckfinder/userfiles/files/2021/0902/99db3d7d51aaf8469a487a9d20e15afe.pdfIn PDF document text
    • http://xn--h49al71atridzo.com/userData/board/file/relodize.pdfIn PDF document text
    • https://energiadirect.pl/application/resources/ckfinder/userfiles/files/pudarapejilaneral.pdfIn PDF document text
    • http://fluorescent-training.com/file/dimosadokitifujasufuf.pdfIn PDF document text
    • http://carrasvilla.es/uploads/files/rurowobixezo.pdfIn PDF document text
    • http://kdsonline.org/userfiles/file/33484498411.pdfIn PDF document text
    • http://www.sainteuphrasia.com/www/js/ckfinder/userfiles/files/89181393482.pdfIn PDF document text
    • http://xn--80aaae7amexjfdlfdfg.xn--p1ai/files/file/36445946436.pdfIn PDF document text
    • http://aven.su/userfiles/file/63391966384.pdfIn PDF document text
    • http://101balkon.ru/upload/files/58036578592.pdfIn PDF document text
    • http://zamgph.com/FCKeditor/editor/filemanager/connectors/php/uploads/file/031949349686.pdfIn PDF document text
    • https://cihangirhotel.com/upload/ckfinder/files/49032954314.pdfIn PDF document text
    • https://kawanmto.info/contents/files/mobogatof.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/1613ecc2cc77ed---85310465667.pdfIn PDF document text
    • http://szakkepzosiklos.hu/upload/file/sezatusevebuwukakatawila.pdfIn PDF document text
    • http://nhanvietgroup.com/demo/xay-dung-tnx/upload/files/45779676816.pdfIn PDF document text
    • http://sprostredkovanieuverov.sk/res/file/lazelixog.pdfIn PDF document text
    • http://benly-carson.com/product/files/20287984167.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d832.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD832 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f044.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF044 17632 bytes
SHA-256: 9aa20d845581207f2df4deb474904721ca9ecfc86ac33c61d1a078964801a6ab
font_02_sfnt_off00011e0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E0B 10736 bytes
SHA-256: b5f9fbafdf670153b3433d69280ac15f1b017f6e5fb0e32497c0dfbda3065f99

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