Malicious PDF — malware analysis report

Static analysis result for SHA-256 068eeb5ba3674945…

MALICIOUS

PDF

74.2 KB Created: 2021-09-06 11:48:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: fbfed1d7201c09236e42ea93195054e9 SHA-1: 69fee3fc9bcd2b8fd88f0d36410403a664bae766 SHA-256: 068eeb5ba367494542dd62763acf4e4dbff31e6e4d424262b497e234e709c591
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF document containing embedded JavaScript, which is a common technique for executing malicious code. It also features numerous links to compromised websites, many of which appear to be part of link farms hosted on disposable or compromised domains. These elements strongly suggest a phishing or malware distribution attempt, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://ketchas.ru/uplcv?utm_term=on+eagle%27s+wings+mark+hayes+pdf PDF link annotation
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/jonmsv51pcto8p1430vacu01i3/3554437715.pdfIn PDF document text
    • http://goang-hann.com/uploads/files/202108151429477174.pdfIn PDF document text
    • https://corpeverest.com/ckfinder/userfiles/files/fimewepakolagowelineja.pdfIn PDF document text
    • http://amwordpress.org/wp-content/plugins/formcraft/file-upload/server/content/files/160ecb3d706388---wafawabuzudajawoseroba.pdfIn PDF document text
    • https://engineeredrepinc.com/wp-content/plugins/super-forms/uploads/php/files/575119fdf3081633dced85d84b528076/tuvijejivijafe.pdfIn PDF document text
    • http://acetuitioncentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160fd50bb2b567---pexevamaxenux.pdfIn PDF document text
    • http://geoodwierty.pl/files/file/dutuduxukifusomuga.pdfIn PDF document text
    • https://dimensioninteractive.com/WYSIWYGImage/file/babutovarezab.pdfIn PDF document text
    • http://www.rolstoellift.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab5c20d6813---jalutas.pdfIn PDF document text
    • https://fetogram.com/images/upload/files/42482220378.pdfIn PDF document text
    • http://martonaroniskola.net/userfiles/file/zujakofuvarovan.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16100c5133672c---jajeb.pdfIn PDF document text
    • https://dafelia.com/files/gazibusoma.pdfIn PDF document text
    • http://0930actress.com/files/files/86716674502.pdfIn PDF document text
    • https://k9-warrior.com/wp-content/plugins/super-forms/uploads/php/files/ptl2d166hpu22jqgv36ouhir9g/vozedolunik.pdfIn PDF document text
    • http://heilpraxis-pankow.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a8c7ef73fc9---lebebidono.pdfIn PDF document text
    • https://congthuonghotel.vn/app/webroot/files/images/pages/files/88533376464.pdfIn PDF document text
    • https://arhstroi.by/uploads/files/63590079911.pdfIn PDF document text
    • http://italiangreyhound.pl/img1/userfiles/file/gasowolag.pdfIn PDF document text
    • http://autavrabek.cz/obrazky/file/vasiwoxovunitumifosuro.pdfIn PDF document text
    • https://www.vek-bg.com/app/templates/js/ckfinder/userfiles/files/toruzalelaxire.pdfIn PDF document text
    • http://recruiters-zone.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f9f20247f2---napajanutagidiret.pdfIn PDF document text
    • http://jatyn.cn/upfiles/202108/file/1630037270.pdfIn PDF document text
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/a4d192fe92077291edf185fe33d95d93/nozedowovurul.pdfIn PDF document text
    • http://azs-szermierka.pl/zdjecia/fck/file/furilekemavuvo.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_off0000bcb4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBCB4 11080 bytes
SHA-256: b5ebc8a6aa2f81c47b719e6c6c62b3d8e33d3922e4ebe6cc52c6553732cc8dc4
font_01_sfnt_off0000d641.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD641 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000ee53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE53 17240 bytes
SHA-256: d0543e2f932618d1a7051b1766e772a49b787c87249d3715a4099ebc87b1d97c