Malicious PDF — malware analysis report

Static analysis result for SHA-256 18900cc69f5a2f80…

MALICIOUS

PDF

80.1 KB Created: 2021-07-27 17:48:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 81ce88c96766e63dc5203368009456dd SHA-1: 0f8d8f12b3b0c6f1180df412297669247bd75ad0 SHA-256: 18900cc69f5a2f80defce78e3549817818840ea7f7e07f4d36684d528d0ef767
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file is identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links pointing to compromised WordPress upload directories and disposable hosting, suggesting a link farm designed to redirect users. The PDF's structure and the presence of multiple external URIs strongly indicate it's used as a lure to lead victims to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://dtcprojects.com.au/wp-content/plugins/super-forms/uploads/php/files/lonf3p9tmq6r2n3d1dlv2s8rvu/zevinesatelafebibali.pdf In PDF document text
    • http://www.chinahkcarplate.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a65fdacfdd4---tijuvovimesafejoxu.pdfIn PDF document text
    • http://aktifbant.com/resimler/files/notololofitavowazov.pdfIn PDF document text
    • http://winso.tw/userfiles/file/70530181700.pdfIn PDF document text
    • https://camile.vn/wp-content/plugins/super-forms/uploads/php/files/k4tspu56j72mit0chct7i3f5mt/wipuzi.pdfIn PDF document text
    • https://aquariumfargo.com/wp-content/plugins/super-forms/uploads/php/files/f9556365df2787793c0168d39883f1e6/vukidaj.pdfIn PDF document text
    • http://grafordexstudents.com/clients/0/05/05b3dbe7dd9dc6f92b523d2b721f2ffd/File/pikede.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c14423af53a.pdfIn PDF document text
    • https://marciasmithconsulting.com/wp-content/plugins/super-forms/uploads/php/files/430b8855b29ae67d06f6b314e4f579c6/fasipukewimetisiz.pdfIn PDF document text
    • http://ganan10.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160b5a036bcb71---10703515120.pdfIn PDF document text
    • https://creativesilhouettes.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a513c024dbc---34034322207.pdfIn PDF document text
    • https://awlights.com/wp-content/plugins/super-forms/uploads/php/files/3c27d9d746ec6808d022acfa5ca92778/52622502587.pdfIn PDF document text
    • http://videofilm-tv.ru/content/File/13327778533.pdfIn PDF document text
    • http://vasilii-orlov.fun/wp-content/plugins/super-forms/uploads/php/files/e6ed2d060e81fc4c13ed7a303eac33c7/demaragowuwitejemo.pdfIn PDF document text
    • http://theopenhouseclub.com/wp-content/plugins/super-forms/uploads/php/files/a0266055e52c3aeacf7209b0936884a4/xunipejojufodu.pdfIn PDF document text
    • http://classicalgardenornaments.com/uplds/file/xifatubifazuwexok.pdfIn PDF document text
    • http://euredit-editions.com/userfiles/file/puposekezobasunitud.pdfIn PDF document text
    • https://plasy.com/uploads/file/4545152886.pdfIn PDF document text
    • http://vetranhtuong.info/luutru/files/41259235474.pdfIn PDF document text
    • https://flylights.pl/wp-content/plugins/super-forms/uploads/php/files/q7pk2qg966i6k8ns036jkt63ri/nofatoj.pdfIn PDF document text
    • https://ukmriptek.org/codeIgniter-hmvc/userfiles/files/12651363813.pdfIn PDF document text
    • https://lllk.ru/wp-content/plugins/super-forms/uploads/php/files/b2c677060fe90ddd0ca0c851219821bf/29835233182.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=1+decametro+cuantos+kilometros+tienePDF link annotation
    • http://e1pl2.nazwa.pl/busy/fotki/file/vodobiwometobulakasowug.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_off0000d2ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2EE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000eb05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB05 10676 bytes
SHA-256: 05146234ba26346ed3fc73befbfac482840599fcf9d07f4df2b268ae1a36a519
font_02_sfnt_off00010370.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10370 18460 bytes
SHA-256: 64bbac3bf538dc1dcef052341e4c483fa9a1cb7073785ca1614260abb8aa3efd

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