Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e1e4789ae05b7fc…

MALICIOUS

PDF

76.1 KB Created: 2021-09-06 03:56:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 8e041b03bc0a04584f8f8cf1d1a140c0 SHA-1: d405aa7955ccb4ab021909764828661cf94ddf25 SHA-256: 9e1e4789ae05b7fc732a59651ec3d796c229076c6f612597068d70ef3ba74de5
156 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs that point to compromised websites and disposable hosting, indicating a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware delivery via these external links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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://transcendenceit.com/wp-content/plugins/super-forms/uploads/php/files/5accec12ae6a51ea40598e4da65ea689/wuzenumuri.pdf In PDF document text
    • http://xn--9p4b29dncp2cc6y.net/upload/fckeditor/file/30294967298.pdfIn PDF document text
    • http://grupogmec.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092d7b4c3d8e---20540330704.pdfIn PDF document text
    • http://sumterhigh89.com/clients/863574/File/repaxoraxilubunazurisa.pdfIn PDF document text
    • https://radio-clipa.ro/userfiles/file/zotef.pdfIn PDF document text
    • http://oryginalnedekoracje.pl/userfiles/file/lewijeres.pdfIn PDF document text
    • http://yuhenganquan.com/userfiles/file/20210702013827_1760411948.pdfIn PDF document text
    • http://dinskayarealty.ru/media/file/dofopesururunaxedaxet.pdfIn PDF document text
    • http://www.lentilles-progressives.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607d42d25c4d9---193822234.pdfIn PDF document text
    • http://floridadressyourhome.com/uploaded_files/userfiles/files/73109604505.pdfIn PDF document text
    • http://buchtel1967.com/clients/26382/File/natupuj.pdfIn PDF document text
    • http://allasclub.com/campannas/file/tosawirerorigesovituzono.pdfIn PDF document text
    • http://www.gainerwindows.ca/wp-content/plugins/super-forms/uploads/php/files/umvnvomom3eop5u0af9kj58ie3/kumotepovivabobeke.pdfIn PDF document text
    • https://www.couleurs-et-jardin.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160a0c1c226056---37811729928.pdfIn PDF document text
    • https://dprkoreatour.com/uploads/files/lukusu.pdfIn PDF document text
    • http://elitk.ru/_files/tixozasi.pdfIn PDF document text
    • http://gloria-eurex.com/wazanoxujamokepevovev.pdfIn PDF document text
    • http://www.fullmooneye.com/wp-content/plugins/formcraft/file-upload/server/content/files/16121807b950cb---56253829751.pdfIn PDF document text
    • http://constructionone.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/161284b262a04a---wuzuxudewotipat.pdfIn PDF document text
    • http://phongkhamducphuc.net/images/files/nopeledubefuwibedibakefuz.pdfIn PDF document text
    • https://sportli.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/16084cc1607bf4---gesebubof.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=questions+on+classification+of+living+things+pdfPDF 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_off0000c17a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC17A 11024 bytes
SHA-256: 0f166ab15ca120e3abd53ab28179268cf57618d2882de67420d7cb6e75cc896f
font_01_sfnt_off0000db01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB01 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f313.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF313 18292 bytes
SHA-256: eaf76e291eb19dc0aec70701a64c8f74f43f346900d087e9fc91cca48e13631f

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