Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e5174f27b4f7196…

MALICIOUS

PDF

73.5 KB Created: 2021-09-15 10:29:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 5911dee311e33517832ac260277a9bba SHA-1: b38a77e69f9f6e17f17c3da5cab2949ef66d38e7 SHA-256: 7e5174f27b4f7196e9fd31ddd9dffddcfe7a10c1fa5e1512d5c864e1e7520de8
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains embedded JavaScript and numerous external URIs, many of which are hosted on compromised or disposable domains, indicating a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware distribution. The embedded JavaScript is likely used to facilitate the redirection or exploit vulnerabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://laborke.ru/uplcv?utm_term=new+torrentz2+movie+download PDF link annotation
    • http://tubietelbar.hu/uploadfile/sasaxijijefan.pdfIn PDF document text
    • http://neoneofytou.com/ckfinder/userfiles/files/wojipibefinininixonij.pdfIn PDF document text
    • http://gocreate.termall.pl/upload/fck/file/nasanuxitozetevoruvosa.pdfIn PDF document text
    • http://veterina-hrib.cz/user-uploads/files/mefixakubudinikowopifub.pdfIn PDF document text
    • http://dorisemitchell.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/gowapuxezofalut.pdfIn PDF document text
    • https://minervatech.work/js/ckfinder/userfiles/files/dozetuwafawexukafuwe.pdfIn PDF document text
    • https://www.gryf-wet.pl/ckfinder/userfiles/files/24177576565.pdfIn PDF document text
    • http://www.nbrownies.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16140ed889d91a---zosowemotuj.pdfIn PDF document text
    • http://top1np.com/ckfinder/userfiles/files/437851314.pdfIn PDF document text
    • https://mission4recruitment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ae2c941ee7---witiwijoguw.pdfIn PDF document text
    • http://ge-mak.com/files/55123901153.pdfIn PDF document text
    • http://dakhoanhanai.com/images/files/23025806479.pdfIn PDF document text
    • https://copyjokertw.aw6.tw/uploadfile/qu4_qu106_com/files/voloso.pdfIn PDF document text
    • http://digitalpolicycouncil.org/imagenes/file/79623142674.pdfIn PDF document text
    • http://keifo.ru/ckfinder/userfiles/files/suvikovipur.pdfIn PDF document text
    • http://4chan.ro/UserFiles/file/72557964414.pdfIn PDF document text
    • http://h-n-s.net/userfiles/file/67634382668.pdfIn PDF document text
    • http://cancunday.com/travela/img/files/86792735446.pdfIn PDF document text
    • https://autotrilogy.com/wp-content/plugins/super-forms/uploads/php/files/49ac7b213503eda9bcadb9fec83fc223/13889431763.pdfIn PDF document text
    • https://inprovitcaribe.com/ckfinder/userfiles/files/98716201033.pdfIn PDF document text
    • https://dubaimotorcycletours.dubaimotorhomerentals.com/uploaded_images/files/25215638049.pdfIn PDF document text
    • http://manvilastrust-org.bvirani.com/ckfinder/userfiles/files/kevojoneligelugoza.pdfIn PDF document text
    • http://www.bash.cl/media/file/paderiretokofalixape.pdfIn PDF document text
    • https://binarbaidrealestate.com/public_html/userfiles/file/vefujunefigobanejujebuv.pdfIn PDF document text
    • http://tks-forever.com/upload/2021/09/12/file/fopufademozaxuxedokoz.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_off0000bf81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF81 10548 bytes
SHA-256: 8eb7272f79ae3f2ac2be2d547e9faf3d24f6a278aba4aaf1e1a585fb17dc241c
font_01_sfnt_off0000d7a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7A2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000efb4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFB4 15996 bytes
SHA-256: 180bb52be3dfd39e3e97d2c1ebb54a82b841431b6c86aee93e16ce1c64567ea0

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