Malicious PDF — malware analysis report

Static analysis result for SHA-256 32ad8a7eb7675940…

MALICIOUS

PDF

77.6 KB Created: 2021-09-02 11:25:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: f40da43d288d2bb367a2cf6bdbfe58ee SHA-1: 92d3d1a4135045f6a05a642c739669756d394459 SHA-256: 32ad8a7eb7675940fa77baeae9320bd42e257f82e4cd85c2164dab30bc9aede2
164 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript and multiple external URIs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm for malicious redirection. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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
  • 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 http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/l6jlr8nv8mrndbnpqibcr5u252/rumomigubozafetosubuxile.pdf In PDF document text
    • http://suachuaspa.com/upload/images-content/files/wurezosurijomemop.pdfIn PDF document text
    • http://ruilong-ironwork.com/CKEdit/upload/files/tipijefug.pdfIn PDF document text
    • http://sushiyaslo.com/uploads/files/87734406355.pdfIn PDF document text
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/h6390setickrj8gfcd9vd18001/60630620982.pdfIn PDF document text
    • http://madveras.com/ckfinder/userfiles/files/6003405999.pdfIn PDF document text
    • http://longarmquiltacademy.com/fckeditor/userfiles/file/papasawosajipopatekeniref.pdfIn PDF document text
    • http://roycraft.ca/userfiles/file/lanijewinesa.pdfIn PDF document text
    • http://tvtamminhphat.com/uploads/userfiles/file/4978344035.pdfIn PDF document text
    • http://deurwater.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091632b33f23---84815782040.pdfIn PDF document text
    • http://mountmedpharmacy.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1608c7c3aa97c7---ginamapopowutodogelerul.pdfIn PDF document text
    • http://www.juniorcollege.cl/ckfinder/userfiles/files/15604027066.pdfIn PDF document text
    • https://glowskincare.net/wp-content/plugins/super-forms/uploads/php/files/5d8ba6c3dfff19c935e4f75f5b9c5c96/95689887584.pdfIn PDF document text
    • http://taikenplan.jp/ckfinder/userfiles/files/47192186587.pdfIn PDF document text
    • http://cathyknightwaite.com/ckfinder/userfiles/files/vomixipilugitov.pdfIn PDF document text
    • https://cal.lighting/wp-content/plugins/super-forms/uploads/php/files/2c003ee4b801725cc24f481624a4a2c2/revufebexapozolor.pdfIn PDF document text
    • http://jeansresource.com/js/ckfinder/userfiles/files/meromebedojowusenomava.pdfIn PDF document text
    • https://bayardplaza.co.uk/wp-content/plugins/super-forms/uploads/php/files/988351dq7fo1241gldvp3nh8ma/43327257515.pdfIn PDF document text
    • https://tfsroanoke.com/home/tfs/public_html/new/ckfinder/userfiles/files/54847772152.pdfIn PDF document text
    • https://pastelbuilders.com/userfiles/file/genoposufamipolojux.pdfIn PDF document text
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/2t36hehn9nhvokdcdo22dclfip/56524033965.pdfIn PDF document text
    • https://www.urban-quartz.co.uk/wp-content/plugins/super-forms/uploads/php/files/82f5b67bcdfd82942b01087b2e47f425/sodaripezupixaparaguj.pdfIn PDF document text
    • https://swotin.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609895e9ab794---57755896300.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=manual+de+instrucciones+lavarropas+whirlpool+awe+2017PDF 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_off0000c741.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC741 11200 bytes
SHA-256: b52c4be8ad3596c4ec41290275e85efd6a4bd27b0c7acbe19b2f684cecc8535f
font_01_sfnt_off0000e193.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE193 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f9a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9A5 18336 bytes
SHA-256: af8b27f5bccf5c00fae534ee59f6130897bfccad65dc4740b45d8f157ff42615