Malicious PDF — malware analysis report

Static analysis result for SHA-256 d056e752e498c000…

MALICIOUS

PDF

78.6 KB Created: 2021-09-20 03:32:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: fa298a4af5fc00b8d3e6dbb3c8fe54ec SHA-1: 4662f91fad9e8cd1e6e65357f80c2cfc7c979dc2 SHA-256: d056e752e498c00038c8ee099c4b42cb2cee62c7b509e976661c2e98a6ab109e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, directing users to multiple external URLs, some hosted on compromised WordPress sites. While no scripts were explicitly extracted, the nature of PDF-based malicious links often involves embedded JavaScript to facilitate redirection or exploit vulnerabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

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://sts-cct.com/app/webroot/userfiles/files/vibibinopituwilak.pdf In PDF document text
    • https://ncltandatbar.com/home/ncltandat/public_html/dowalumniusa/ckfinder/userfiles/files/88921276753.pdfIn PDF document text
    • https://iohrp.org/f_files/files/difipawi.pdfIn PDF document text
    • http://tdbm.vn/upload/files/xalav.pdfIn PDF document text
    • https://nationalcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613fb97e8fc1e---69484683169.pdfIn PDF document text
    • http://fundacjahfg.pl/upload/file/mexefivawufizowigakuja.pdfIn PDF document text
    • https://eliteswimmingpoolsinc.com/wp-content/plugins/super-forms/uploads/php/files/d5qhpsjdbb8vc6f3osj27ai211/tanepazamexotelipat.pdfIn PDF document text
    • https://allora-tour.by/var/upload/file/66017552277.pdfIn PDF document text
    • http://alrabbanoilandgas.com/file/files/sujipik.pdfIn PDF document text
    • http://svsteinfurth.de/radsportfiles/file/87438412523.pdfIn PDF document text
    • http://kvrhousing.com/uploads/94926306252.pdfIn PDF document text
    • https://gtnet-engine.com/ckfinder/userfiles/files/44272034793.pdfIn PDF document text
    • http://www.mousumibanerjee.com/fckimages/file/gusel.pdfIn PDF document text
    • http://cserepakcio.hu/xdata/file/kuzanonoxepimegomi.pdfIn PDF document text
    • http://moestuinwebshop.nl/userfiles/file/tefugoburirabisemuse.pdfIn PDF document text
    • https://hchoanglong.vn/userfiles/file/sabixorevapopanax.pdfIn PDF document text
    • http://muszempilla.com/files/file/90550558605.pdfIn PDF document text
    • http://kvrhousing.com/uploads/46287136673.pdfIn PDF document text
    • http://westfallassociates.com/documents/file/81899058807.pdfIn PDF document text
    • https://expomediainc.com/upload/file/33475830634.pdfIn PDF document text
    • http://tecsun-moscow.ru/docs/file/juzatodepaxene.pdfIn PDF document text
    • https://pensiuneavalentina.ro/app/webroot/file/tomebelabetowe.pdfIn PDF document text
    • http://www.jhannahs.com/wp-content/plugins/formcraft/file-upload/server/content/files/16141924288415---13796376.pdfIn PDF document text
    • https://sunrise-photon.com/upfiles/editor/files/vefav.pdfIn PDF document text
    • https://rusepress.com/uploads/wysiwyg/files/muvililejupebu.pdfIn PDF document text
    • http://elpijisystem.com/file/ruvewezipixojufolatim.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=watch+cathouse+episodesPDF 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_off0000cef4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEF4 17684 bytes
SHA-256: 66188e07c1e1a6aa5d2972cc4c9338862cb0af24c18269c4ba4bb921efea358f
font_01_sfnt_off0000fd05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD05 10456 bytes
SHA-256: b0a990003464f4ac5a6ebd0ed3a2d01a13a9cf200447486a2a721bf0a96ae3f6
font_02_sfnt_off000114f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114F8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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