Malicious PDF — malware analysis report

Static analysis result for SHA-256 e65fe1fc219c07f1…

MALICIOUS

PDF

81.5 KB Created: 2021-09-20 14:43:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: ec690c229ff3a5e4cd05bc001596fb41 SHA-1: d3fce0132e9070f30b9b37f4f3f965787823a836 SHA-256: e65fe1fc219c07f1c1def74422ebeb4268e4d51ad461b0a820b16260fb37b048
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1055.012 Process Injection

The PDF contains numerous links, many pointing to compromised CMS uploads, suggesting a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or distributing further malware. The file's structure as a link farm on disposable hosting further supports this. No scripts were extracted, limiting the analysis of direct execution capabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

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 http://newtarrytowndeli.com/uploads/files/mepewoketosudokazegagik.pdf In PDF document text
    • http://yasaitogo.com/uploads/files/23388553375.pdfIn PDF document text
    • http://botosani.ro/img/uploads/file/vedimapibulebetagugibig.pdfIn PDF document text
    • http://snnet.kr/board_pds/fckeditor/2021/09/file/winefajalikemuxewabap.pdfIn PDF document text
    • http://churchontherockuk.org/home/churchontherock1/public_html/userfiles/files/kesomenupideritufixidawo.pdfIn PDF document text
    • http://hungbuloon.com/media/ftp/file/fomoruxegefexegejifalu.pdfIn PDF document text
    • http://inspiredindianfoundation.org/uploads/10207537953.pdfIn PDF document text
    • http://constructionone.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16140b9fead6be---pibazudibusidezuperade.pdfIn PDF document text
    • http://autosoftware.company/autoresponders_images/files/zitorutewipefovugokuvek.pdfIn PDF document text
    • https://gamepinleri.com/calisma2/files/uploads/86628551563.pdfIn PDF document text
    • https://takarasushimn.com/userfiles/files/37484400833.pdfIn PDF document text
    • https://saraelv.no/wp-content/plugins/formcraft/file-upload/server/content/files/1613facbfbbfd3---81161331208.pdfIn PDF document text
    • http://originalbau.hu/imagesfiles/ravugosawozopad.pdfIn PDF document text
    • http://squarcialupirelaxinchianti.com/writable/public/userfiles/file/wibokobaruwuwobewikagav.pdfIn PDF document text
    • https://ambalatender.com/upload/files/rasepofe.pdfIn PDF document text
    • https://partetesal.ir/data/file/nabipubadurazar.pdfIn PDF document text
    • http://snieznik.pl/userfiles/file/25907403145.pdfIn PDF document text
    • https://aronabritcan.com/userfiles/file/54688910085.pdfIn PDF document text
    • http://galsabino.it/userfiles/files/dunamimugijekinidub.pdfIn PDF document text
    • https://grootformaatspandoeken.nl/userfiles/file/7119415811.pdfIn PDF document text
    • http://vhktn.at/images/content/files/96830569903.pdfIn PDF document text
    • http://sasnowosielski.com/ckfinder/userfiles/files/94748144544.pdfIn PDF document text
    • http://uran-berlin.com/userfiles/file/1628967705.pdfIn PDF document text
    • http://kronospan-mofa-hungary.hu/editor_up/37844973435.pdfIn PDF document text
    • https://www.revistadefiesta.com/wp-content/plugins/formcraft/file-upload/server/content/files/16143a7101bb85---dajukipuloralubu.pdfIn PDF document text
    • https://www.sacproblemleri.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613da8d886b37---kevogivitazorikiwulaxejol.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=upcoming+phone+launch+date+in+indiaPDF link annotation
    • 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_off0000d304.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD304 10800 bytes
SHA-256: 866176f0a2fdedd200e286363fc633cfec62a64fde044670cb619064bd96e909
font_01_sfnt_off0000eb73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB73 20432 bytes
SHA-256: 04959a113f2c594ee571ea371106db8fdb357720aed9bb05a48f115aac68362c
font_02_sfnt_off00011fdb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FDB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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