Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6ecb4117c617c87…

MALICIOUS

PDF

81.2 KB Created: 2021-09-17 21:36:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 84a968f6e6147e66d3a04c5df25ec823 SHA-1: 397c0b80c6905fb99eff0ca986e3a42d4d1195a2 SHA-256: f6ecb4117c617c8718543678aad883b4edc06d6005e34b592dd9ef4e9258f706
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains numerous embedded URLs that form a link farm, with several pointing to compromised CMS upload storage and disposable hosting. The primary purpose appears to be directing users to potentially malicious external sites, consistent with phishing or malware distribution tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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://huntic.ru/uplcv?utm_term=under+10k+best+phone+in+bd PDF link annotation
    • http://holmeslawfirm-iowa.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/69972290951.pdfIn PDF document text
    • https://plasy.com/uploads/file/fajilapokibukel.pdfIn PDF document text
    • http://www.awakohchang.com/image/upload/File/8485911721.pdfIn PDF document text
    • https://actsonics.com/uploads/files/202109062019107354.pdfIn PDF document text
    • https://leise.ru/admin/ckfinder/userfiles/files/16072941588.pdfIn PDF document text
    • http://bridgeonlaw.com/filespath/files/20210906213150.pdfIn PDF document text
    • https://bliznacite.com/files/75484523396.pdfIn PDF document text
    • http://hondatayho.top/img-ngocbao/files/12281256904.pdfIn PDF document text
    • https://cyberbirddog.com/userfiles/files/noganetelopolesetiwepexe.pdfIn PDF document text
    • http://www.naturapreserved.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139392e0d66f---64171168231.pdfIn PDF document text
    • http://managhantasala.net/mailuserfiles/file/divurikazuzasidezunigibeb.pdfIn PDF document text
    • http://evolution-dev.com/file_media/file_image/file/ruwekeletowokimipeba.pdfIn PDF document text
    • https://endeligmandag.no/e-brev/data/div/tesoginuxogijereduvok.pdfIn PDF document text
    • http://kingsbrite.com/kingsbrite.com/userfiles/file/68229233097.pdfIn PDF document text
    • https://coastalholidayproperty.com/ckfinder/userfiles/files/tufalavewerudadepage.pdfIn PDF document text
    • http://kmkonsult.cz/userfiles/file/65747038589.pdfIn PDF document text
    • https://worldkelo.com/wp-content/plugins/super-forms/uploads/php/files/d7c3a3d423545df4215a14c36d1c9090/18961326066.pdfIn PDF document text
    • http://www.39koratmachinery.com/file_upload/files/48313457125.pdfIn PDF document text
    • http://eqletstalk.com/uploads/files/202109031959125243.pdfIn PDF document text
    • http://suamanhinhlcd.net/userfiles/file/pavifusizefeditanivawoto.pdfIn PDF document text
    • http://balcimimarlik.com/resimler/files/dupibaxilivawufiv.pdfIn PDF document text
    • https://www.dazzlingdecor.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1614256e50c88c---kusixigenekufasapomi.pdfIn PDF document text
    • https://lightupalife.org.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16138900cced92---17651704959.pdfIn PDF document text
    • https://www.ciabrini-immobilier.com/wp-content/plugins/super-forms/uploads/php/files/1dfrvhgr7is1vbp28kmlv2hplf/86405137248.pdfIn PDF document text
    • https://macauroommate.com/ckfinder/userfiles/files/farumemagepewusutojuxonik.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_off0000d8ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8EE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f100.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF100 17980 bytes
SHA-256: 56ad2611005504176c21e4d9e458fcf027e1e037a7ec9221789eaec0ffc580f9
font_02_sfnt_off00011f4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F4B 10692 bytes
SHA-256: 7ae76b4c3e11bd75e3d5a997751a24ad051b3217a68a8aad40d725cc0e4069f3

Open this report in the interactive analyzer, or submit your own file for analysis.