Malicious PDF — malware analysis report

Static analysis result for SHA-256 e80508ccf4a128f8…

MALICIOUS

PDF

83.3 KB Created: 2021-09-04 23:48:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: cce4edfbff6d8e1b096cfda071b5de4a SHA-1: 865551645a23d4b308f4cb5f2f32e8f08574d5e4 SHA-256: e80508ccf4a128f84250b583c2d59b593951d8ff23d826e29e9221c9487fd1a2
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating it is likely a phishing or trojan delivery mechanism. It contains numerous embedded URLs, many pointing to compromised websites or disposable hosting, forming a link farm designed to redirect users to malicious sites. The primary purpose appears to be directing users to phishing or malware download pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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 https://pistant.ru/uplcv?utm_term=biometric+residence+permit+indefinite+leave+to+remain+pdf PDF link annotation
    • https://adikketiga.com/contents//files/87546166132.pdfIn PDF document text
    • http://0930actress.com/files/files/60402786478.pdfIn PDF document text
    • https://www.advids.co/wp-content/plugins/formcraft/file-upload/server/content/files/160c5d92d08da6---muzafovuxojil.pdfIn PDF document text
    • http://pttaccounting.com/userfiles/files/93988746753.pdfIn PDF document text
    • http://riversreunion.org/clients/8699/File/46750888737.pdfIn PDF document text
    • http://nhadatv.com/webroot/img/files/nugibogusafikubefaxafev.pdfIn PDF document text
    • http://xn--aknmedcal-wpbe.com/uploads/file/zudemimafasavolopu.pdfIn PDF document text
    • https://skazkavdom.com/wp-content/plugins/super-forms/uploads/php/files/471106e0f01dc3f110851610909b8957/52987429841.pdfIn PDF document text
    • http://ncdesign.it/userfiles/files/83329534202.pdfIn PDF document text
    • http://cga82.com/admin/File/wunomijanubaju.pdfIn PDF document text
    • https://serviceservice.eu/userfiles/file/riderimemevuwegezameboda.pdfIn PDF document text
    • https://bititechnika.com/uploads/file/47723675395.pdfIn PDF document text
    • http://maility.pl/_ADRESuserfiles/file/limare.pdfIn PDF document text
    • http://www.pattyn360.com/upload/forum/files/tabuposigufenomew.pdfIn PDF document text
    • https://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/be12672410122871c24c70f43ad8a91f/borexupokutotokedisuwono.pdfIn PDF document text
    • http://alexanderkanevskyartgallery.com/clientMedia/file/50070031075.pdfIn PDF document text
    • http://dh-life.com/ckfinder/userfiles/files/32888805453.pdfIn PDF document text
    • https://unitedcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a770dbf3ce---jevipu.pdfIn PDF document text
    • https://maloneslandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608014a9be735---gozinufuxibuwip.pdfIn PDF document text
    • http://easternsheep.by/app/upload/file/282240050.pdfIn PDF document text
    • http://aklond.com/UploadFilesfile///2021050122115451.pdfIn PDF document text
    • http://prabashproperties.com/ckfinder/userfiles/files/jepipukodulujopujero.pdfIn PDF document text
    • http://velocimapper.com//webfiles/file/wopededate.pdfIn PDF document text
    • https://srmhospitalities.com/images/bulk_images/files/98826462842.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_off0000e16b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE16B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f97d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF97D 17276 bytes
SHA-256: f15cc84a5051d3d799b9a83442f81ccf080687f7dd197c4761e79742a8ab5be1
font_02_sfnt_off000125e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125E8 10900 bytes
SHA-256: fcae99874b09acea1d5d367eadb8da0b768f52b3a16e8584ca330b20406561f7

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