Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d02c3253034385b…

MALICIOUS

PDF

71.4 KB Created: 2021-09-25 02:23:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: ec38a8bc6ca1f1873bfa694f7099d824 SHA-1: ea3095d110a0f6e59c7b85db3935cfdf7e3838bb SHA-256: 4d02c3253034385bd2c414b05482dd6255166964cc38a82038a7e69afaf63cbe
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including ClamAV detection and an ML classifier. It contains embedded JavaScript and a large number of external URIs, many of which point to compromised CMS uploads or disposable hosting, suggesting a phishing or malware distribution campaign. The embedded JavaScript likely facilitates the redirection to these malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://irlanc.ru/uplcv?utm_term=justice+league+death+of+superman+full+movie PDF link annotation
    • https://anglarill.net/userfiles/file/dakozojegolop.pdfIn PDF document text
    • https://orsam.org.tr/paketler/ckfinder/dosyalar/files/fatifetukupinovedogusaki.pdfIn PDF document text
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/94524d8f956ab105bdc25d908c0acc28/81231937828.pdfIn PDF document text
    • http://www.c-l-r-p.com/admin/ckfinder/userfiles/files/57835352386.pdfIn PDF document text
    • https://barcelonacentremedic.cat/files/galeria/files/28047356256.pdfIn PDF document text
    • http://bestapp4u.com/admin/uploadedfiles/file/soxosojonerabow.pdfIn PDF document text
    • http://mesotects.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614d7536e0c4e---bipagewaduvedawufojizefiw.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613d5bfdd8966---pedakafadajesosub.pdfIn PDF document text
    • http://gaushalango.com/uploaded_files/userfiles/files/pelexamigiborinofowik.pdfIn PDF document text
    • http://gaia-onlus.org/userfiles/file/23724170012.pdfIn PDF document text
    • http://jinwoosmc.com/userfiles/file/36050500441.pdfIn PDF document text
    • http://www.park-seversk.ru/other/js/ckfinder/userfiles/files/93432302281.pdfIn PDF document text
    • http://menifee.hanasushichoice.com/uploads/files/ruwazelezetedetut.pdfIn PDF document text
    • http://kiapelhrimov.cz/UserFiles/File/dekunupu.pdfIn PDF document text
    • https://www.agro-zavod.ru/app/webroot/js/ckfinder/userfiles/files/60110119300.pdfIn PDF document text
    • http://kxqcgs.com/filespath/files/20210907025546.pdfIn PDF document text
    • http://goozzl.com/userfiles/files/6349114630.pdfIn PDF document text
    • https://purpleleafestatebuyers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614224c335069---fisuxefadijeletori.pdfIn PDF document text
    • http://newshop.jp/archive/file/57120312779.pdfIn PDF document text
    • https://ijfbacknumber.com/editor_up/kedatiketopapivulegiz.pdfIn PDF document text
    • http://www.pibmg.com.br/ckfinder/userfiles/files/files/69475899817.pdfIn PDF document text
    • https://ohcsi.com/ckfinder/userfiles/files/29532103457.pdfIn PDF document text
    • https://eghamatkade.com/basefile/eghamatkadecom/files/poxivaxupefopepawasem.pdfIn PDF document text
    • http://sententtech.com/file_media/file_image/file/jugumikisuja.pdfIn PDF document text
    • https://lcd96.ru/wp-content/plugins/super-forms/uploads/php/files/0a9bdf57697f6dc070ef1b052253b1ea/vuzukexinetusijuneduzi.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_off0000b5cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB5CD 11224 bytes
SHA-256: faebc4d14105abcf00902a1b290f844853a4f9cca38090a3d0d0fc4799436411
font_01_sfnt_off0000cfc5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFC5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e7d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7D7 15568 bytes
SHA-256: 9dd26ea63a730409e8312cc251e639bd0b06d0973f6ee7b88ffdd762427b0253