Malicious PDF — malware analysis report

Static analysis result for SHA-256 e042d3416326d3ef…

MALICIOUS

PDF

86.2 KB Created: 2021-09-16 10:52:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 79745d0f5febb94f0e64c829d4828d38 SHA-1: c8890cfcf8642776bb99fe16f8c5d45ad3eadc6f SHA-256: e042d3416326d3efce333dd462ac941839055776a20e24bf5ac32137f5990177
156 Risk Score

Malware Insights

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

The PDF contains numerous external URIs and link farms pointing to potentially compromised websites, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document designed to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://wastran.ru/uplcv?utm_term=gta+vice+city+game+hack PDF link annotation
    • https://phatgiaolongan.com/upload/ckupload/files/vosufozog.pdfIn PDF document text
    • http://zapatosperezcabrera.com/ckfinder/userfiles/files/32469451675.pdfIn PDF document text
    • http://mq-water.net/upload/mulizuzogotabimap.pdfIn PDF document text
    • http://happyorderfood.com/uploads/files/xilemipazegi.pdfIn PDF document text
    • http://socialbomjesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/161365445e02c3---tutirasazosadiluve.pdfIn PDF document text
    • http://audiomaster.se/wp-content/plugins/formcraft/file-upload/server/content/files/16132a29987ecf---15418022471.pdfIn PDF document text
    • https://fuze-pay.com/ckfinder/userfiles/files/75050368894.pdfIn PDF document text
    • https://www.americanapi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16141804cbef2a---ripovumupesaragokame.pdfIn PDF document text
    • https://imagebeaute.fr/userfiles/file/lupik.pdfIn PDF document text
    • https://vizzzio.ru/wp-content/plugins/super-forms/uploads/php/files/490dde1d2e7271aebeeec5c43422bccc/welozifusagagajajasu.pdfIn PDF document text
    • http://zuche0551.com/upload/file/witufatowasuxofimusud.pdfIn PDF document text
    • https://ofertaromania.ro/ckfinder/userfiles/files/31855704609.pdfIn PDF document text
    • https://borgopitti.it/userfiles/file/86310153848.pdfIn PDF document text
    • https://www.die-umzugsfabrik.com/wp-content/plugins/formcraft/file-upload/server/content/files/16142df64cc1c7---novolukajobonam.pdfIn PDF document text
    • http://afghansolar.com/userfiles/file/simadevokoxuzorix.pdfIn PDF document text
    • http://nmways.com/uploads/fckupload/file/59524627945.pdfIn PDF document text
    • http://sunnyten.net/userData/board/file/xilamalo.pdfIn PDF document text
    • https://ozanetiket.com/TasarimAcarnet/serhali/upload/files/kidesobituka.pdfIn PDF document text
    • http://webcertain.ca/contentupload/fckeditorUploads/organization_/file/59088448629.pdfIn PDF document text
    • http://thelifelesson.net/home/tappingchanges/public_html/dowalumniusa/ckfinder/userfiles/files/kemedanazudetesagate.pdfIn PDF document text
    • https://walterchiropracticclinic.com/home/walter/public_html/ckfinder/userfiles/files/43066467582.pdfIn PDF document text
    • https://eventpro-kontraktorpameran.com/uploaded/files/61837000267.pdfIn PDF document text
    • http://drtamerturan.com/file/93625340023.pdfIn PDF document text
    • http://reopen911.info/media/file/67068414033.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_off0000eaf0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAF0 18476 bytes
SHA-256: 9b52468c92d40e92062c841c6b9d1f5f247cddd8fee463c4004bb9f285cb5283
font_01_sfnt_off00011a50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A50 10452 bytes
SHA-256: 40120160e2e9e1727a0354a594636da31d0b610ad0daea3159d85ebe69705d64
font_02_sfnt_off0001321d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1321D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1