Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0ad27be185fdd18…

MALICIOUS

PDF

91.2 KB Created: 2021-08-06 15:53:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 11162a1268484d330aeaceef4484afc3 SHA-1: cd827b272a98b7e66422c1a584c13845b312aca3 SHA-256: e0ad27be185fdd18eec075ed488befc7fb8c9cf99728ad7dd5e38ab8f3ee0bb0
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains embedded JavaScript and a significant number of external links, many pointing to compromised or disposable hosting. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicates it functions as a link farm, likely to obscure the true destination or to manipulate search engine results. The embedded JavaScript and link farm structure suggest an attempt to redirect the user to a malicious site for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://atesolve.com/ckfinder/userfiles/files/16690095328.pdf In PDF document text
    • https://siahotel.com/userfiles/files/wewovi.pdfIn PDF document text
    • https://vivekanandbawwa.com/userfiles/file/gibupovewigutinij.pdfIn PDF document text
    • https://agenciaboom.com/wp-content/plugins/super-forms/uploads/php/files/m21roo58lqctv690bhpof0bb84/71070986775.pdfIn PDF document text
    • https://www.goldenplanet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160ad42f301da1---detatajifetodeparavu.pdfIn PDF document text
    • http://yogo110.com/userfiles/file/4984964368.pdfIn PDF document text
    • https://vaytieudungtragop.com.vn/wp-content/plugins/super-forms/uploads/php/files/rk7ulbsotks65g8f5vn0h32ugn/gibase.pdfIn PDF document text
    • https://sipsib.ru/wp-content/plugins/super-forms/uploads/php/files/fe6bf24f78dd830a90f8be502e2e97fd/20750309264.pdfIn PDF document text
    • https://www.lang-mayer.de/wp-content/plugins/formcraft/file-upload/server/content/files/16088648f49ba4---49770989353.pdfIn PDF document text
    • https://diversified-nj.com/wp-content/plugins/super-forms/uploads/php/files/ef067c828447ed3175d365dadaf6cb42/96633243419.pdfIn PDF document text
    • http://jointrilogy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d905ed893b---sirokemuriwirari.pdfIn PDF document text
    • https://kfz-gutachter-oliver-schiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606f7f5089010---93382967218.pdfIn PDF document text
    • http://dioceseofniranam.org/userfiles/file/94435442887.pdfIn PDF document text
    • http://arunimaflavours.com/userfiles/file/vejodiwo.pdfIn PDF document text
    • http://delawaretravelmedicine.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085a40a63853---depitiradem.pdfIn PDF document text
    • https://www.grandeprairie.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608f8fc3cdf28---78131665803.pdfIn PDF document text
    • http://hoadondientu-ptp.vn/images/ckeditor/files/29779986397.pdfIn PDF document text
    • https://ataru.site/js/ckfinder/userfiles/files/dejop.pdfIn PDF document text
    • https://getlovebooks.com/wp-content/plugins/super-forms/uploads/php/files/45e215371f06025af56cf682262febfa/82297896705.pdfIn PDF document text
    • http://bagliodeimille.it/userfiles/files/23038017571.pdfIn PDF document text
    • http://www.deadclan.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1606cb48b8d0b3---nenofelofizemagutaxu.pdfIn PDF document text
    • https://yournew.site/wp-content/plugins/super-forms/uploads/php/files/78q6724i0b1kk1520r331nrm14/jadoga.pdfIn PDF document text
    • https://kimtuong.vn/isc/public/files/fckupload/file/56707731691.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=prothom+alo+bcs+model+test+pdf+downloadPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e9de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9DE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000101f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101F0 17180 bytes
SHA-256: bd8bef83699b6646a1c63788fbdc4e5e9eb8233ece04ee674690d6f4c24be5af
font_02_sfnt_off00012eaf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EAF 11020 bytes
SHA-256: 1e605e9c02f4a29e6b818c43bba337863c8b768eabad42312a9b1ff51e574a66
font_03_sfnt_off000147ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x147FF 16144 bytes
SHA-256: 94ada888842219b54f0bff61c05754c95ee5bc28b4560123b174b2ad5ef12220