Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0582f4cfdd52d2e…

MALICIOUS

PDF

72.3 KB Created: 2021-07-25 23:46:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: e8f86893f51af625252aa7345c75cf87 SHA-1: b8a4bb472f7240f4be04db4d8781579edd3d30db SHA-256: d0582f4cfdd52d2e7954507b89308c95cf200bf8bcc7a21c4adc7d116f2e8db4
156 Risk Score

Malware Insights

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

This PDF was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV confirming it as a phishing trojan. It contains numerous links pointing to compromised websites and disposable hosting, suggesting a phishing or malware distribution campaign. The document body is unreadable, but the presence of external links and the overall detection profile indicate a likely attempt to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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
  • 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://ambalatender.com/upload/files/zasogelaxo.pdf In PDF document text
    • http://www.nowsingapore.co.id/wp-content/plugins/formcraft/file-upload/server/content/files/160bbad351020d---nunopubuz.pdfIn PDF document text
    • http://codemessaging.net/ckfinder/userfiles/files/56430355200.pdfIn PDF document text
    • http://alexanderkanevskyartistbiography.com/clientMedia/file/94648088045.pdfIn PDF document text
    • http://milcontabil.com.br/wp-content/plugins/super-forms/uploads/php/files/27mtknrpaegpq9eslru5ujsmn5/xokafakisikemoz.pdfIn PDF document text
    • http://knshzj.com/CKEdit/upload/files/gitezafosuxisufovaguna.pdfIn PDF document text
    • https://englewoodgrassfarm.com/wp-content/plugins/super-forms/uploads/php/files/1f2cd5271b44fafcf05bd328cbe91e07/91733108466.pdfIn PDF document text
    • http://rittenhousereunion.com/clients/a/ad/ad7d26974070b67854a29702aed78614/File/tenisudubij.pdfIn PDF document text
    • https://dhins.com/testingsites/advantage_aviation/assets/media/file/voreluxaxoborumenoleseje.pdfIn PDF document text
    • https://retta-bg.com/userfiles/pesekejowuvuzuka.pdfIn PDF document text
    • http://psychanalyste-gard.fr/ckfinder/userfiles/files/redobufevovijomuxatofeto.pdfIn PDF document text
    • http://bestforfishing.com/wp-content/plugins/super-forms/uploads/php/files/352178007c3661b07cba9f1a44742a23/27519394967.pdfIn PDF document text
    • https://www.fifatravels.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d4aedc2fb2---47785652036.pdfIn PDF document text
    • http://yuseigachi.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160825f48bc6b1---58680777102.pdfIn PDF document text
    • http://www.kinoimaging.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160bd8635bd236---80959846126.pdfIn PDF document text
    • http://www.aluvascientific.com/UserFiles/file/53846288230.pdfIn PDF document text
    • http://www.chinahkcarplate.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089218410de1---dipajazev.pdfIn PDF document text
    • https://artlabjo.com/userfiles/file/17986438435.pdfIn PDF document text
    • http://www.fd.ntou.edu.tw/ckfinder/userfiles/files/79241923856.pdfIn PDF document text
    • https://abe-rdc.com/userfiles/file/sogajelaxobofupele.pdfIn PDF document text
    • http://duda-tech.pl/dudatech/upload/file/wenogobegobepurilifonu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=pivot+animator+4.+1.+10+szybki+pobierzoPDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b947.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB947 11160 bytes
SHA-256: bc4fecc836c9ca8c5487e0b2cdf830e80c31adc3243ac050be945ceffdd0faee
font_01_sfnt_off0000d349.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD349 15632 bytes
SHA-256: f5a4a25f09b39ff62d9ac34a869851cc48d6c7e65e225e975e4730c702804473
font_02_sfnt_off0000fb7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB7D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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