Malicious PDF — malware analysis report

Static analysis result for SHA-256 e65d3dbbd0b8cb84…

MALICIOUS

PDF

68.2 KB Created: 2021-09-26 06:59:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: d89f76f6e0017aadf2c2025ca46fe6fc SHA-1: b8ff0f58d9d087473e61fd6d86a5eb426bb70650 SHA-256: e65d3dbbd0b8cb843bb3d33501fa32f53e6e37276983b87ecf7118dd0b4a1fc8
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file is identified as malicious by ML classifiers and ClamAV, exhibiting characteristics of a phishing lure. It contains an image designed to look like a document, with embedded links pointing to various external domains, many of which appear to be compromised WordPress sites or disposable hosting. The primary purpose seems to be directing users to malicious content or further infection vectors.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 68 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://coretry.ru/uplcv?utm_term=ghostland+streaming+vf PDF link annotation
    • http://vinhomeshaiphong.net/app/webroot/img/files/sesiz.pdfIn PDF document text
    • http://theartofdesign.nl/ckfinder/userfiles/files/xelipexerawenogafazoril.pdfIn PDF document text
    • https://implantologie-deva.ro/app/webroot/files/userfiles/files/pabavamajejegin.pdfIn PDF document text
    • https://zivotzaokny.eu/res/file/38905165964.pdfIn PDF document text
    • http://easytravel63.ru/ckfinder/userfiles/files/49463981238.pdfIn PDF document text
    • https://www.leasing.net.in/ckfinder/userfiles/files/roxelalolagidewejivuz.pdfIn PDF document text
    • http://lagerunda.it/public/upload/file/sukipipojusudebajidelefi.pdfIn PDF document text
    • https://yam-token.com/business_school/uploads/file/22128347253.pdfIn PDF document text
    • http://ophtalmic-overnight.fr/wp-content/plugins/formcraft/file-upload/server/content/files/161353760aceb0---87822317532.pdfIn PDF document text
    • http://najlepsietorty.sk/uploads/fck/file/27645846431.pdfIn PDF document text
    • http://pileshoppen.dk/userfiles/file/mopiwejifenevire.pdfIn PDF document text
    • https://leavereview.com/customerinterview/ckfinder/userfiles/files/93315000819.pdfIn PDF document text
    • http://principessavencanice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613804c992823---vapojate.pdfIn PDF document text
    • https://bedandbreakfastchia.it/userfiles/file/59022776033.pdfIn PDF document text
    • http://wordtmann.beckbauer.eu/ckfinder/userfiles/files/42034802220.pdfIn PDF document text
    • https://iphonerepairservice.nl/app/webroot/files/userfiles/files/30351622085.pdfIn PDF document text
    • http://pentas.eu/userfiles/file/bawelilirasudos.pdfIn PDF document text
    • http://ff-engineering.com/userfiles/files/14651902790.pdfIn PDF document text
    • http://www.alfainstal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1614644dd61ba0---35701334639.pdfIn PDF document text
    • http://vinag7furniture.com/app/webroot/files/editor_upload/files/23186186295.pdfIn PDF document text
    • http://heatherjansch.com/ckfinder/userfiles/files/84148413878.pdfIn PDF document text
    • http://dreptultau.hotnews.md/upload/userfiles/files/83162277945.pdfIn PDF document text
    • http://www.ponderosafestival.com/wp-content/plugins/formcraft/file-upload/server/content/files/16148ed6b21bb3---40771754596.pdfIn PDF document text
    • http://uniradioweb.info/userfiles/file/24592815223.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_off0000af6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAF6A 10908 bytes
SHA-256: 0ceb36af272909b7211f43165e0aff411a5689840beadf189f3287215fbf31af
font_01_sfnt_off0000c852.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC852 14244 bytes
SHA-256: cd8334fa9fe4178aac197c399cd13cc5c6d63b0d183d8c5253ac493a4c4ea252
font_02_sfnt_off0000ebb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBB7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1