Malicious PDF — malware analysis report

Static analysis result for SHA-256 fed6d4943d1c3d4d…

MALICIOUS

PDF

72.1 KB Created: 2021-09-26 23:35:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 5cc296b89f9a6fc2ffeb9625f2354dc1 SHA-1: 808bcdf6b323cb285ab8992200eb970799a38de7 SHA-256: fed6d4943d1c3d4d8cabb54a2dfa3fcff1001a0172821278854d047fabda6e46
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file is identified as malicious by ML classifiers and ClamAV. It functions as a link farm, with numerous embedded URLs pointing to various domains, including those associated with compromised CMS uploads and disposable hosting. The primary purpose appears to be directing users to potentially malicious or phishing content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9840

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://allytemp.ru/uplcv?utm_term=smb+android+tv PDF link annotation
    • http://apluskleaning.com/admin/images/file/97784340889.pdfIn PDF document text
    • http://melabo.com/upload/files/87953798529.pdfIn PDF document text
    • http://www.chiringuitomediterraneo.com/ckfinder/userfiles/files/72940662721.pdfIn PDF document text
    • https://jaunimodienos.lt/wp-content/plugins/super-forms/uploads/php/files/1dnqsscsvbesbctcm76c2jfbj0/wujajulezesajadu.pdfIn PDF document text
    • https://nistd.in/userfiles/file/35242542789.pdfIn PDF document text
    • http://avalon-essenzen.at/userfiles/file/gumirepedusobixu.pdfIn PDF document text
    • http://massageindex.nl/images/uploads/koxisos.pdfIn PDF document text
    • http://monikaknoblochova.com/userfiles/file/71855619641.pdfIn PDF document text
    • http://blgjad.com/upload/files/25939832927.pdfIn PDF document text
    • https://borderpak.com/wp-content/plugins/super-forms/uploads/php/files/895b4dcd275520ddfe1b0e371cfc567e/80599668816.pdfIn PDF document text
    • http://litho-and-co.fr/ckeditor/upload/files/kaxel.pdfIn PDF document text
    • https://gccpay.net/wp-content/plugins/super-forms/uploads/php/files/79193757471cd8449bd676a0f406d9a3/wajetamazawufomomovola.pdfIn PDF document text
    • http://nacyc.jp/Upload/file/gekiwoliwokivekar.pdfIn PDF document text
    • http://luligang.com/ckfinder/userfiles/files/6388632365.pdfIn PDF document text
    • http://cicm2015.mist.ac.bd/app/webroot/ckfinder/userfiles/files/7778866128.pdfIn PDF document text
    • http://themadthinker.com/temp/vinney/HTML/userfiles/file/tilinesuk.pdfIn PDF document text
    • https://greenlakepaint.com/ckfinder/userfiles/files/tesipubutubomerivimoba.pdfIn PDF document text
    • http://whatifitspossible.com/ckfinder/userfiles/files/bijebelurawav.pdfIn PDF document text
    • http://moveworldtogether.com/datas/files/mijan.pdfIn PDF document text
    • https://novsport.com/content/File/61863071015.pdfIn PDF document text
    • https://nam.it/wp-content/plugins/formcraft/file-upload/server/content/files/1614c3effd5258---84482202404.pdfIn PDF document text
    • https://itchanoi.vn/uploads/news_file/38850098075.pdfIn PDF document text
    • https://mraos.com/web/userfiles/file/9999865826.pdfIn PDF document text
    • http://www.maderas-navarro.com/ckfinder/userfiles/files/linoguvunur.pdfIn PDF document text
    • http://victoryelectricalsupply.com/ckfinder/userfiles/files/44578409681.pdfIn PDF document text
    • http://sancheonglittletheaters.com/upload/userfiles/2021/09/files/210903230815.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_off0000b49c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB49C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ccb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCB3 10344 bytes
SHA-256: 068e1451bf2776636c3537bbdd0c25cfc1eb03f50ec9063f959b513346aad6d7
font_02_sfnt_off0000e401.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE401 18216 bytes
SHA-256: ad6f17cc433ff54985927c777bded888ff011832a25db01f085405947442520a