Malicious PDF — malware analysis report

Static analysis result for SHA-256 e30da6472ffc08d2…

MALICIOUS

PDF

89.5 KB Created: 2021-09-16 09:02:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20
MD5: 83d84dc0940d1b2c624bedfb083cada8 SHA-1: 64b0fd41d86bb76bda904e257d0e2fa8b171e51d SHA-256: e30da6472ffc08d2ceaac082df213c241cbd2ccf75420d01578fd73e996b9c4b
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous external URIs and is identified as a link farm on disposable hosting, suggesting a phishing or malware distribution scheme. Although no scripts were explicitly extracted, the PDF structure and embedded URIs point towards an attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

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 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.
  • 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://synerhu.ru/uplcv?utm_term=lost+woods+ocarina+sheet+music PDF link annotation
    • https://www.puskinas.lt/ckfinder/userfiles/files/18814606564.pdfIn PDF document text
    • http://mlsy.cz/images/file/files/tawonewudalivedowan.pdfIn PDF document text
    • http://dolphinkorea.com/files/files/33784071956.pdfIn PDF document text
    • http://eca.or.th/ckfinder/userfiles/files/42810474940.pdfIn PDF document text
    • http://huabulaw.com/uploadpic/2021-9/file/2021090405502273499.pdfIn PDF document text
    • http://swaving-stalinrichting.nl/ckfinder/userfiles/files/tizuwazuvodazadojosuduni.pdfIn PDF document text
    • https://hongdung.vn/ckeditor/images/files/nurogodupuj.pdfIn PDF document text
    • http://www.birapart.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c660aa8b7f---32702483708.pdfIn PDF document text
    • https://hmradiatoriai.lt/images/files/jobigi.pdfIn PDF document text
    • http://bienchidan.org/uploads/files/44720130624.pdfIn PDF document text
    • http://www.virtualaid.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1614162a54ce63---29290010939.pdfIn PDF document text
    • https://euronet.stonavka.cz/webpagebuilder/ckfinder/userfiles/files/726542630.pdfIn PDF document text
    • http://centromp.it/userfiles/files/nufuvamulosipitupij.pdfIn PDF document text
    • https://sailstudy.in/ckfinder/userfiles/files/lanobuf.pdfIn PDF document text
    • https://newsale.linyn.mobi/upload/ckeditor/pages/files/xulam.pdfIn PDF document text
    • http://studioagronomoserragiotto.eu/userfiles/files/suxopirawudinagojolo.pdfIn PDF document text
    • http://happy-land.hu/editor_up/joxuloratajililag.pdfIn PDF document text
    • https://tbsva.org/Upload/files/20210910170347.pdfIn PDF document text
    • http://aquamedia.cn/ckfinder/userfiles/files/kotetaxapaxilewolexeg.pdfIn PDF document text
    • http://fzcce.com/aimgs/uload/files/zukesatumokowewidadozerif.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_off0000f5bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5BD 10732 bytes
SHA-256: 64acfe3c8a16c597ca3d6cb2e2477de851672e4d132ddf569f2e87d3eb95c451
font_01_sfnt_off00010e43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E43 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012655.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12655 18960 bytes
SHA-256: a547a45a85eea5b903644f963e4594aa3098bcb88ff1f734af09ed1c4e50f5aa

Open this report in the interactive analyzer, or submit your own file for analysis.