Malicious PDF — malware analysis report

Static analysis result for SHA-256 6fade9658bd860c5…

MALICIOUS

PDF

82.2 KB Created: 2021-09-04 16:32:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 602e877606f10fc8b0adedb7ed870d50 SHA-1: 65a274a986b19e72e7f7be1d75fb39eff450fc72 SHA-256: 6fade9658bd860c5fe63ef8434c9e707adced35fc9d8cf27c75ffe4a4ee5576a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous external links, many pointing to compromised websites or disposable hosting, suggesting a link farm designed to lead users to malicious content. The ClamAV detection and ML classifier strongly indicate a phishing or malware distribution intent. No scripts were extracted, but the structure and URL patterns are consistent with a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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=principles+of+accounting+pdf+bba PDF link annotation
    • https://maconlux.lu/userfiles/files/25163165718.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/160febe2d9cbae---68762728147.pdfIn PDF document text
    • http://lapenya.cat/imgjovesnaves/file/lelefuxuvaxoluni.pdfIn PDF document text
    • https://www.golaw.net/wp-content/plugins/formcraft/file-upload/server/content/files/160deca88b5f9e---56026357686.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/turuwewudixazopafokepuw.pdfIn PDF document text
    • http://orderbestwings.com/uploads/files/32200718340.pdfIn PDF document text
    • http://jyjwqj.com/uploadfile/file///2021071616300846.pdfIn PDF document text
    • http://pate4me.com/userfiles/file/fotoponironuzijiveguv.pdfIn PDF document text
    • http://elhammagazine.com/ckfinder/userfiles/files/91031423332.pdfIn PDF document text
    • http://capmar.eu/userfiles/file/mojiwutiminagoba.pdfIn PDF document text
    • http://brezov-gaj.si/uporabnik/file/45323108709.pdfIn PDF document text
    • http://color-gateway.com/userfiles/file/87574766958.pdfIn PDF document text
    • http://www.bridalchapel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610e8e8d1b03c---40145229763.pdfIn PDF document text
    • http://www.adanakursmerkezi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a844de66d9f---12027782041.pdfIn PDF document text
    • http://hueide.com/upload/files/muzikepetokuwegijim.pdfIn PDF document text
    • http://savalis.ru/userfiles/file/47369173318.pdfIn PDF document text
    • https://transilvaniafishing.ro/app/webroot/files/userfiles/files/gazetuwenunitutizes.pdfIn PDF document text
    • http://mistralizmiryonetim.com/uploads/file/lovunejevaxumelaribidojev.pdfIn PDF document text
    • http://shinyoungvalve.com/userData/board/file/donililedijibapuwamebofi.pdfIn PDF document text
    • http://billsky.ee/files/file/11441370023.pdfIn PDF document text
    • http://informerfitness.com/wp-content/plugins/super-forms/uploads/php/files/9025492d66ac49c6239de5f3b66d9ac0/93458271509.pdfIn PDF document text
    • https://www.sesc.com.ua/wp-content/plugins/super-forms/uploads/php/files/0spue5qumj3vnf642845g99a97/selexojovalexivagowul.pdfIn PDF document text
    • http://dlt-nkp.com/fileupload//file/89763719129.pdfIn PDF document text
    • http://florylaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/kapojufos.pdfIn PDF document text
    • http://farmaciafasolis.eu/userfiles/files/vugazafejotukavudag.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_off0000dbbe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBBE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f3d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3D5 11036 bytes
SHA-256: 08cfb623e0d7b7d7bace9ed7c9c031bad8c6af5805bc70a7f5b6f1483c2c6f00
font_02_sfnt_off00010d2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D2B 17900 bytes
SHA-256: 0a40d94681ae2afabc937dfe414cbaf52012f75a8e49beaa109927894c957679

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