Malicious PDF — malware analysis report

Static analysis result for SHA-256 95f572d3c50c96b3…

MALICIOUS

PDF

81.4 KB Created: 2021-09-18 07:54:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: cc4e079c0daeb3f58babd8a3ad106291 SHA-1: df1b051832b2c1c3056c3701db1323851823be5b SHA-256: 95f572d3c50c96b38ef48e476ec303f5ae149fd0506b8c389ef36b556b3ff3b9
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a link farm with numerous URLs, many hosted on compromised WordPress sites or disposable domains, designed to redirect users to potentially malicious content. The presence of embedded URLs and the nature of the link farm suggest an attempt to trick users into visiting harmful sites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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
  • 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.
  • 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://wamsconference.com/wp-content/plugins/super-forms/uploads/php/files/af633b59d038a73737bc351a2e9391bc/34113373785.pdf
    • http://avandcie-automation.com/ckfinder/userfiles/files/rujonebemifibixidujozuvu.pdf
    • http://auburn-companies.com/userfiles/files/terowobavovilejumum.pdf
    • https://www.coconutlodge.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132bfbc977e0---bezuvetaxexopoza.pdf
    • http://swhos.com/upload/files/61717012433.pdf
    • https://malayalamfoundation.org/admin/my_files/file/61004629263.pdf
    • http://kosmonautika.ee/ckfinder/userfiles/files/luvugara.pdf
    • http://www.jcca.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/16138efb363f4b---lumewebamapavemebila.pdf
    • http://formpart.com/upload/ckfinder/files/wukedelibo.pdf
    • http://pilot-market.ru/new/files/file/lutinudalufirujik.pdf
    • https://kozhikodedeaf.org/admin/my_files/file/zelitevunixovajukivese.pdf
    • https://ms2oke.com/contents/files/nubalexinaluwanukomabita.pdf
    • https://nnt52.ru/userfiles/file/3218915579.pdf
    • http://old.bgk-meshkova.com/ckeditor/ckfinder/userfiles/files/tapadaniwuwatonope.pdf
    • http://daiduongmetal.com/uploads/ckfinder/files/30494587337.pdf
    • http://ristoranteibucanieri.it/userfiles/files/lefariwanewawudezikudavo.pdf
    • http://uktohabbarijamalta.com/files/file/14284495953.pdf
    • http://bzws.zhanyougame.com/ckfinder/userfiles/files/11089981954.pdf
    • https://leunamgroup.com/wp-content/plugins/super-forms/uploads/php/files/a923ea6c070d5de3f1a6a98e53242fb0/werodezozi.pdf
    • http://zatoodesign.com/userfiles/files/44656154089.pdf
    • http://foto-recepty.sk/images/fotky/tikitejonixezigekakoru.pdf
    • http://dobraukraina.org/sites/all/sites/dobraukraina.org/files/jobewamowugopubaridaz.pdf
    • http://open.ua/uploads/ckeditor/files/80097712711.pdf
    • https://calmoinc.com/upload/editor/file/difiwipawozida.pdf
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/78u33t6cgunfnmi8u0v0gha446/25631588417.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=never+let+me+go+book+read+online
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000da2d.bin
355050beaae98935e0ca531729b838bff67ade995bf52d4bf79d486830d98679
pdf-font-stream PDF embedded font (sfnt) at offset 0xDA2D 17516 bytes
font_01_sfnt_off000107bb.bin
7ed35040faa49d27b3368ed3a22e6abdf87b33f464f30794e16c14bb2f73d4a1
pdf-font-stream PDF embedded font (sfnt) at offset 0x107BB 10696 bytes
font_02_sfnt_off0001200a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1200A 16792 bytes