Malicious PDF — malware analysis report

Static analysis result for SHA-256 98239ca597d92586…

MALICIOUS

PDF

72.0 KB Created: 2021-09-21 22:06:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 8082d6bb2a68a60a5b36cdf6587d5b6e SHA-1: 81528e513df3733a999c11ae759a6c2985e10788 SHA-256: 98239ca597d92586db22b42d814b749459961c564d51bf88298b602f557183a5
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to websites hosted on compromised CMS platforms, indicating a link farm designed to redirect users to potentially malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9840

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://pistant.ru/uplcv?utm_term=justice+league+film+zack+snyder PDF link annotation
    • http://medwin.kr/userData/board/file/goxuxozorofu.pdfIn PDF document text
    • http://solee.cn/ckfinder/userfiles/files/30406642033.pdfIn PDF document text
    • http://xprchemical.com/upload/files/sepaxezolozufegad.pdfIn PDF document text
    • https://g55net.com/webpagebuilder/ckfinder/userfiles/files/94585940283.pdfIn PDF document text
    • https://gbagencement.fr/uploads/file/90650636083.pdfIn PDF document text
    • https://snapstudios.ca/userfiles/file/8550968059.pdfIn PDF document text
    • https://mavismanagement.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136f25045eee---desenezubulivovo.pdfIn PDF document text
    • https://dispecom.com/cms_dispecom/sgi_userfiles/userfiles/files/50929537954.pdfIn PDF document text
    • http://www.portaldasfreguesias.com/portugal/vianadocastelo/vianadocastelo/geraz_do_lima_sta_maria/ckeditor/ckfinder/file/luvakemez.pdfIn PDF document text
    • http://studiotrusso.it/userfiles/files/77096862155.pdfIn PDF document text
    • https://un7un9b3rl1pa7-99.com/contents/files/53161061892.pdfIn PDF document text
    • https://cmflower-kkc.com/ckfinder/userfiles/files/zikuxik.pdfIn PDF document text
    • https://eownauto.com/uploadpic/files/puvesixopedukekaluke.pdfIn PDF document text
    • https://www.grecosalesinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614572ba34343---kutajagojetife.pdfIn PDF document text
    • https://aczv.fr/userfiles/file/fajepapozerisu.pdfIn PDF document text
    • http://clerus.hu/files/file/96706386559.pdfIn PDF document text
    • https://probidjp.com/ckfinder/userfiles/files/20210915_202326.pdfIn PDF document text
    • http://guoyangmoju.com/userfiles/files/44809240553.pdfIn PDF document text
    • http://zaun-produzent.de/userfiles/file/sotob.pdfIn PDF document text
    • https://hinaweb.com/upload/file/38162961638.pdfIn PDF document text
    • https://pindimana.in/uploads/file/gifodesad.pdfIn PDF document text
    • http://mazurubezpieczenia.pl/zdjecia/fck/file/88166688649.pdfIn PDF document text
    • http://intelekt.biz/uploads/pages/files/posutisogevuwanej.pdfIn PDF document text
    • http://sinara.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613dfeda205be---83699908245.pdfIn PDF document text
    • https://navoloki.mebel18.com/uploads/files/tivubupivalikofupetexufam.pdfIn PDF document text
    • http://daydeothe.vn/rich_editor/file/ziwap.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_off0000b604.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB604 11056 bytes
SHA-256: ba15e511605afcbf935ae1709a507ee295694824f0a13214509db81719a81f19
font_01_sfnt_off0000cfa2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFA2 16580 bytes
SHA-256: d0da06982e9babed27b245a01ab74bf4dc5392c2c088516cf1d6b80e42adf45d
font_02_sfnt_off0000fa28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA28 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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