Malicious PDF — malware analysis report

Static analysis result for SHA-256 380fe323d749007b…

MALICIOUS

PDF

82.2 KB Created: 2021-09-14 12:13:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 18f24ea0c7b6919dc2b790f6ba5773bc SHA-1: 2ca0a69392fbcaf34b01c3236341bbf1e23b8cc4 SHA-256: 380fe323d749007bf0a018a4545253a636faa909a9ae6260904f5466e7423575
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is a common technique for delivering malicious content. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates that the PDF is designed to redirect users to a large number of distinct hosts, suggesting a phishing or scam attempt. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://www.giuseppe.ru/ckfinder/userfiles/files/wadurigapalozafev.pdf In PDF document text
    • https://chowdhurytourism.com/ckfinder/userfiles/files/83032275398.pdfIn PDF document text
    • https://wacee.net/wp-content/plugins/formcraft/file-upload/server/content/files/1612f5b442de43---81772425054.pdfIn PDF document text
    • https://egokituz.org/files/galeria/files/61983766070.pdfIn PDF document text
    • http://clearspace-design.com/CKEdit/upload/files/wunepoxoj.pdfIn PDF document text
    • http://cortocircuito.trialpanel.com/images/Upload/files/ruliruxaxopudekux.pdfIn PDF document text
    • http://impressivetravelvietnam.com/upload/files/kugexidum.pdfIn PDF document text
    • http://kapsalonvogue.nl/files/file/godoxawozerubuzakokote.pdfIn PDF document text
    • http://elistaprezentow.pl/userfiles/file/98625846978.pdfIn PDF document text
    • https://nusamulticentralestari.com/Uploads/userfiles/files/52127216441.pdfIn PDF document text
    • http://faithleader.org/js/ckfinder/userfiles/files/gulegosujewa.pdfIn PDF document text
    • http://etnorom.hu/pictures/60909564880.pdfIn PDF document text
    • https://gregoryshow.ru/files/file/6599934737.pdfIn PDF document text
    • https://limsurdua.com/contents/files/63507251769.pdfIn PDF document text
    • http://queensparkview.com/image/upload/File/57343761470.pdfIn PDF document text
    • http://kleinschadenexpert.com/userfiles/file/zudevimigilagokuf.pdfIn PDF document text
    • http://studioiulianella.it/userfiles/files/19085753516.pdfIn PDF document text
    • http://snieznik.pl/userfiles/file/navajux.pdfIn PDF document text
    • http://ekopaczka.pl/imgbrama/files/xesibi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=how+to+click+background+blur+photos+in+androidPDF link annotation
    • https://bxthirteen.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/947dadf333ec6e2880061605e0992e23/92670518021.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_off0000dc86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC86 11072 bytes
SHA-256: 80920d12e11a2951f8fdfe997a43a1d5408a97734a3a6ae58a43a5478af20119
font_01_sfnt_off0000f5cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5CF 17776 bytes
SHA-256: 0dbfbf050e5968d0edbca09a2548c0db1af1494ad8cd0a42220215915cb3af78
font_02_sfnt_off00012383.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12383 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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