Malicious PDF — malware analysis report

Static analysis result for SHA-256 011a48913c2487fe…

MALICIOUS

PDF

74.1 KB Created: 2021-09-08 07:43:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 442587299981c9fca8e02fe40d437bf7 SHA-1: 9f07564393a168d8305a928052a669ac30bbb6dd SHA-256: 011a48913c2487fe32e9973317f196594e80a53869450d54af04efa5de8bf460
164 Risk Score

Malware Insights

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

This PDF contains embedded JavaScript, which is often used to redirect users to malicious websites or download further payloads. The presence of numerous links to potentially compromised or disposable hosting, coupled with a high ML classifier score and ClamAV detection, strongly indicates malicious intent. The embedded JavaScript likely facilitates the redirection to one of the listed malicious URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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 https://ratosatu.com/contents/files/8305955136.pdf
    • https://adlinefor.com/home/webagen/public_html/korn/data/file/81254449879.pdf
    • http://edu-family72.ru/content/images/uploads/file/xofaketoda.pdf
    • http://amfmeg.org/wp-content/plugins/formcraft/file-upload/server/content/files/16080fb32c46de---bedopedibovekisid.pdf
    • http://www.alex-vasilkov.ru/images/wisdom/file/dadiwutozamopokevarokiri.pdf
    • http://aaaexpressac.com/userfiles/file/76840651089.pdf
    • http://paintmaster.hu/js/ckfinder/userfiles/files/dafapebunodopejulin.pdf
    • http://sendedianqi.com/upload_fck/file/2021-6-15/20210615180023581342.pdf
    • https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/55df75050873b97fa7982e5b4c93cb6f/34016886734.pdf
    • https://sieompaysdebray.fr/lesiom/txt/imgadmin/file/13405702451.pdf
    • http://jnnycc.org/userfiles/file/zipexozixolobutonemufi.pdf
    • http://karcannakliyat.com/userfiles/file/zuxodavejededolimevo.pdf
    • http://eastendmediation.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/98418261481.pdf
    • https://www.lightingdynamics.com/wp-content/plugins/super-forms/uploads/php/files/2eb56ff86a4287658b473df0950def6c/momani.pdf
    • http://liccuza.ro/stiri_files/file/70857295560.pdf
    • http://i-p-p-c.com/ckfinder/userfiles/files/15199882633.pdf
    • http://anneadamslaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/84064642154.pdf
    • http://kmkonsult.cz/userfiles/file/29865288378.pdf
    • http://cokhitienvuong.com/uploads/files/daruzagewakubumetimixi.pdf
    • https://slavica.ru/wp-content/plugins/super-forms/uploads/php/files/b4d861d7d6e7e4c1cb9d45ce73db32c9/mivivizazef.pdf
    • http://nieruchomosci-swidnica.pl/userfiles/file/25463177481.pdf
    • https://debo-fit.be/userfiles/file///buloxadogukaf.pdf
    • https://www.sudburyhighspeedinternet.ca/wp-content/plugins/super-forms/uploads/php/files/0cfbb76d00a5d1f6963baa528b054987/5171643170.pdf
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c74862cdefb---lojubudiruruzemawufazav.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=basics+of+physics+pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c0fb.bin
34ee2d0ab59c94698f8d5f35c565199ce86fd4f51bad5b2a2317445fc03cba94
pdf-font-stream PDF embedded font (sfnt) at offset 0xC0FB 10404 bytes
font_01_sfnt_off0000d8b7.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xD8B7 16792 bytes
font_02_sfnt_off0000f0c9.bin
7baf39e0851e4ec65ae5e5fc037247d5cf39d1de30bd55937e31a49e031d6558
pdf-font-stream PDF embedded font (sfnt) at offset 0xF0C9 16424 bytes