Malicious PDF — malware analysis report

Static analysis result for SHA-256 5cd0216baebeee02…

MALICIOUS

PDF

85.3 KB Created: 2021-09-23 20:32:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: f9b1ffdd20774866ab6f8345b4af090a SHA-1: cf80bbfe8b2ac652fdcbaa7db724bd5d69329d57 SHA-256: 5cd0216baebeee0288dee51a6972f970a298c85791e7007687fcff5c6ede33b3
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, suggesting a link farm or phishing lure. The presence of external URI heuristics and the compromised CMS upload link farm heuristic further support the conclusion that this PDF is designed to redirect users to malicious or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://oniceh.ru/uplcv?utm_term=idm+not+showing+on+chrome PDF link annotation
    • https://staffxrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/4622cb5507e3915f9bd0287be0cf24c5/jitotu.pdfIn PDF document text
    • https://chiataiec.com/userfiles/Proj_Name/files/78220133378.pdfIn PDF document text
    • http://orenprom.com/img/account/file/zitazubakuxure.pdfIn PDF document text
    • https://mtestbd.com/assets/uploads/files/65681318486.pdfIn PDF document text
    • http://www.everhouse.lt/wp-content/plugins/formcraft/file-upload/server/content/files/1614baa3c65668---zizawoxuvobabo.pdfIn PDF document text
    • http://apexnepaltravel.com/userfiles/file/72035932018.pdfIn PDF document text
    • http://wksystems.net/HotelEstimator/userfiles/file/xugepujoxu.pdfIn PDF document text
    • https://nabijdefossa.nl/upload/files/32565388713.pdfIn PDF document text
    • https://dongciao.com/uploads/files/202109010238373292.pdfIn PDF document text
    • http://studiopedrazzini.eu/userfiles/files/3692866257.pdfIn PDF document text
    • https://bbpartner.cz/userfiles/file/wufipel.pdfIn PDF document text
    • http://www.tm-africa.com/beta/public/uploads/cms_filescms_files/fipenizuxubomuninifi.pdfIn PDF document text
    • https://www.taxikladis.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1613c386305493---59263792625.pdfIn PDF document text
    • http://nhatngungoisaoxanh.com/upload/files/wibor.pdfIn PDF document text
    • http://iamsoldierfit.com/wp-content/plugins/formcraft/file-upload/server/content/files/16131dbcadef64---71735885291.pdfIn PDF document text
    • http://abpaluso.com/upload/file/84352661737.pdfIn PDF document text
    • https://xlspandoek.nl/userfiles/file/64577045348.pdfIn PDF document text
    • https://glosunspa.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614314b4895fd---26019659431.pdfIn PDF document text
    • https://linhquan-group.com/upload/ck/files/83927040289.pdfIn PDF document text
    • https://fototipia.hu/files/files/budemikiwexe.pdfIn PDF document text
    • https://ciela13.leaddeehub.com/userfiles/files/21951414178.pdfIn PDF document text
    • http://thrifty-uy.com/files/others/pulepati.pdfIn PDF document text
    • http://www.tenniscanberra.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16148ac1de6442---80985565814.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_off0000e8dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8DC 10648 bytes
SHA-256: e12ab60967566dd8d72eebdd98633f2b610e0e32a776365d960dffe6b1556f83
font_01_sfnt_off000100e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100E0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000118f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118F2 17784 bytes
SHA-256: 1ccfce8fd3aea47de11fa3df27e2303bf5854cdb2a8cce76dfb8264f706bb2cb

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