Malicious PDF — malware analysis report

Static analysis result for SHA-256 06bce63c1b775212…

MALICIOUS

PDF

81.0 KB Created: 2021-09-17 06:20:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 982c89fa6fdc9d1c747c45da86675eb7 SHA-1: d6b4aeea8470b46ee30d16f149b5b5593d62593f SHA-256: 06bce63c1b775212e98f853a0f4122fcaa5a1c2950abc42a2267c00d3c0ae20f
134 Risk Score

Malware Insights

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

The sample is a PDF document identified as malicious by ClamAV and an ML classifier. It contains embedded JavaScript and numerous external URIs pointing to disposable hosting, suggesting it functions as a downloader or phishing lure. The primary intent appears to be redirecting users to potentially malicious websites, as indicated by the PDF_SEO_DISPOSABLE_LINK_FARM heuristic and the high number of external URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9911

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://garglob.ru/uplcv?utm_term=framaroot+apk+download PDF link annotation
    • http://saxonrt.hu/img/userfiles/files/xamiwitamu.pdfIn PDF document text
    • https://gloriamus.org/Uploads/userfiles/files/5788776751.pdfIn PDF document text
    • http://dj-maily.com/uploads/pages/files/15722283417.pdfIn PDF document text
    • http://pozitron-s.ru/userfiles/file/xitowudiwomabonuxubuvumaz.pdfIn PDF document text
    • https://apaman.ti-am.jp/js/ckfinder/userfiles/files/zigoviparege.pdfIn PDF document text
    • http://droprint.my/home/ququ4923/public_html/userfiles/file/sudapugexitoribeletewifi.pdfIn PDF document text
    • http://myucpb.com/userfiles/file/mujajenutewowujirafozetu.pdfIn PDF document text
    • http://herningbadintra.dk/app/webroot/upload/files/romuvit.pdfIn PDF document text
    • http://pilatesmystyle.com/userfiles/files/fatabulamufo.pdfIn PDF document text
    • https://girisimhaber.com/uploads/file/88984320335.pdfIn PDF document text
    • http://de.ruben.pl/ckfinder/userfiles/files/47179303772.pdfIn PDF document text
    • http://artiguardia.pl/userfiles/file/nebutel.pdfIn PDF document text
    • http://ch-bovi.com/upload/files/97652867885.pdfIn PDF document text
    • http://anoh.net/pds/userfiles/files/kadolekivot.pdfIn PDF document text
    • http://diennuocdanang.com/uploads/image/files/92529318424.pdfIn PDF document text
    • http://cleanyachts.it/writable/public/userfiles/file/97461075784.pdfIn PDF document text
    • http://perfekt-dom.pl/designhome/admin/userfiles/file/mobeganexapokoxitujenos.pdfIn PDF document text
    • http://boxshop.mn/userfiles/files/tunebomupixekogok.pdfIn PDF document text
    • https://macleanpinesdrivingschool.com.au/wp-content/plugins/super-forms/uploads/php/files/9e762c9847d310349544711c02964d3e/jewejimowemekufubefo.pdfIn PDF document text
    • http://www.uvhk.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613cb81e869fa---xozavejigumezo.pdfIn PDF document text
    • http://kbfrutos.sk/images/_file/misilujakowarojikutale.pdfIn PDF document text
    • http://alrehabourhome.com/userfiles/files/pakamibulimigesupufiwil.pdfIn PDF document text
    • http://mgocsm.in/userfiles/file/89572262746.pdfIn PDF document text
    • https://remini.hu/userfiles/file/25161122871.pdfIn PDF document text
    • http://aptekarynek.pl/zdjecia/fck/file/79662904464.pdfIn PDF document text
    • http://anoh.net/pds/userfiles/files/pitetideramenorepu.pdfIn PDF document text
    • https://akamercedes.com/images/uploads/files/18656863084.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_off0000d8d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8D7 10316 bytes
SHA-256: 1cbae31a1774f95b3b2b9352f0f92c99be95de40fe9a6741f54883829344528d
font_01_sfnt_off0000f018.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF018 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001082a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1082A 17764 bytes
SHA-256: 0d2b4ca04f93a66ffe8056c6d5495c20730846afa1c4c8679d1726dce5046c39