Malicious PDF — malware analysis report

Static analysis result for SHA-256 d616bae8c33f9232…

MALICIOUS

PDF

80.4 KB Created: 2021-09-14 11:54:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 709377a4a9a5637c78a82ae4e2ee6888 SHA-1: 8a97633efaaed6f1fe91ba9e2713707272427c99 SHA-256: d616bae8c33f9232b64175601d72d4ca60dd44d6e20ee7a29bf09f03a26ff97d
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded JavaScript and a large number of links, many pointing to disposable domains, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The embedded JavaScript likely facilitates the redirection to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://sovaimm.it/userfiles/files/fitelujexaxapaxupavo.pdf In PDF document text
    • http://avvocatoandreabruschi.it/userfiles/files/zemojesiwiwu.pdfIn PDF document text
    • https://lenaoyunlar.com/calisma2/files/uploads/niluruzalatigereda.pdfIn PDF document text
    • https://y3stwk65l-mn9.com/contents/files/71418640186.pdfIn PDF document text
    • http://dinskayarealty.ru/media/file/26350558406.pdfIn PDF document text
    • http://severstroysnab.ru/userfiles/file/janaledubabe.pdfIn PDF document text
    • http://fujavietnam.com/images/Download/lukajolupepebusalowufeso.pdfIn PDF document text
    • http://ecoaga.com/documentos/file/bojig.pdfIn PDF document text
    • http://samnakthodrahassob.com/userfiles/file/xigetijifozuto.pdfIn PDF document text
    • http://faceconnects.com/ci/userfiles/files/89036870640.pdfIn PDF document text
    • http://jogagongu.pl/userfiles/file/97808706638.pdfIn PDF document text
    • http://sovaimm.it/userfiles/files/wovat.pdfIn PDF document text
    • http://drsrkbedcollege.com/ckeditor/ckfinder/userfiles/files/17794447789.pdfIn PDF document text
    • http://carshopm.com/js/upload/files/71849035777.pdfIn PDF document text
    • http://dalieuht.com/app/webroot/uploads/files/49583834183.pdfIn PDF document text
    • http://kanoonkaraj.ir/dbmanager/filebank/htmlgallery/file///82662921053.pdfIn PDF document text
    • https://fulzugaskozpont.hu/files/60419351800.pdfIn PDF document text
    • https://ihotel2b.com/upfiles/editor/files/puravutolabekupoleta.pdfIn PDF document text
    • http://shengnabei.com/uploadfile/file///2021090621284759.pdfIn PDF document text
    • http://veterky.ru/ckfinder/userfiles/files/47731495211.pdfIn PDF document text
    • http://thecountryclub32055.com/userimages/5879469772.pdfIn PDF document text
    • http://noxsun.com/jingkelun/userfiles/files/20210910001008.pdfIn PDF document text
    • http://csc021.com/userfiles/file/20210907174952_6kv060.pdfIn PDF document text
    • https://cqhuaan.myhost360.cn/upload/files/09-06-12-33-47-79.pdfIn PDF document text
    • https://fermuar.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613162d1d3480---92686352186.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=hack+wifi+iphonePDF link annotation
    • 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_off0000d4bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4BB 18672 bytes
SHA-256: 5878fb2a4af6d2f03126563053d003e89c7eff9b26846b31db82c9c4ee2b6e9e
font_01_sfnt_off00010482.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10482 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011c99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C99 10336 bytes
SHA-256: adfc9bfcd050dbb197b186416a39220534c9078b7dcb029ac9a4c17e7c20c147

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