Malicious PDF — malware analysis report

Static analysis result for SHA-256 d049292d7e92e494…

MALICIOUS

PDF

73.0 KB Created: 2021-09-24 23:45:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 3257d3d12b82d7a2ffb967d152e9df37 SHA-1: 2dba2b35af6d8a9c8536b40b8341afc1e9d8e0d3 SHA-256: d049292d7e92e4949f4e7e9db8b97d1c4c217babf1a7ace8fd8a9b5e60015b1b
134 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript and numerous external URIs, many of which are hosted on disposable domains and appear to be part of a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The presence of JavaScript suggests an attempt to execute code or redirect the user to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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.
  • JavaScript action low PDF_JAVASCRIPT
    PDF contains a /JavaScript action. 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://catamma.ru/uplcv?utm_term=shutapp+premium+apk PDF link annotation
    • https://tybistanbul.org/resimler/files/likupobibedo.pdfIn PDF document text
    • https://www.mozartcantat.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16142ff6b93f7b---rakuxigozobadamuba.pdfIn PDF document text
    • https://lecourbe.dk/userfiles/file/wujapupaf.pdfIn PDF document text
    • http://ekogamma.pl/javascript/ckfinder/userfiles/files/5963176318.pdfIn PDF document text
    • https://gretajensen.com/ckfinder/userfiles/files/bisozebedokufosinipo.pdfIn PDF document text
    • https://copyjokertw.aw6.tw/uploadfile/qu4_qu106_com/files/24512083888.pdfIn PDF document text
    • https://lecourbe.dk/userfiles/file/jofedixinobudili.pdfIn PDF document text
    • http://www.prodomasa.com/ckfinder/userfiles/files/nunaw.pdfIn PDF document text
    • http://podlahypilat.cz/admin/file/13421356070.pdfIn PDF document text
    • http://studiotecnicoarduini.eu/userfiles/files/tokiseroxoxonisiwu.pdfIn PDF document text
    • http://crmloccitanecr.com/campannas/file/16895022232.pdfIn PDF document text
    • http://www.tivafa.hu/upload/file/tubojetumusesanekor.pdfIn PDF document text
    • https://procogs.com/FCKeditor/file/wolaxuxojusidukuja.pdfIn PDF document text
    • http://aloeverajuice.cz/files/file/76052925677.pdfIn PDF document text
    • https://toyotaautobody.com/ckfinder/userfiles/files/88663794387.pdfIn PDF document text
    • http://gancza.pl/userfiles/file/sugevuvudemozoj.pdfIn PDF document text
    • http://nsdadventist.org/FCKData/file/pafokiva.pdfIn PDF document text
    • https://chataigne-cevennes.fr/imgs/files/67683471823.pdfIn PDF document text
    • https://fruitssupplier.com/app/webroot/img/files/mevimilamojisopivezojoj.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614625aaac392---2841703940.pdfIn PDF document text
    • http://mdbim.pl/ubezpiecz/obrazy/file/guvikezuxik.pdfIn PDF document text
    • https://dmshospital.com/mm_engg/files/23149888541.pdfIn PDF document text
    • https://knurussian.kr/DATA/upload/files/202109230608025497.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_off0000b601.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB601 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ce13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE13 18704 bytes
SHA-256: c143d18990d3f05dd18945ef696d786aaa6ee2760a52a43d7ec6d5767fad3897
font_02_sfnt_off0000feea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEEA 10344 bytes
SHA-256: 0b0dbe3b48b0709b2fd49b39ee2c002dac389f8ce9f58c738d4778acd431d2d0