Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5dfce2946a74e52…

MALICIOUS

PDF

72.2 KB Created: 2021-09-20 05:15:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 6608a45913312db203e7f1987caedc06 SHA-1: 8ed57a167da297012cd793c7c53d1435296457b6 SHA-256: d5dfce2946a74e52e4e28f0ebdd0203359ad8486454290a3882e60f4341917ec
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external URIs and link farms pointing to potentially malicious or compromised websites, as indicated by heuristics like PDF_URI and PDF_SEO_DISPOSABLE_LINK_FARM. The ML classifier and ClamAV detection strongly suggest malicious intent, classifying it as a phishing trojan. The document's structure and embedded links are designed to trick users into visiting these external sites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://garglob.ru/uplcv?utm_term=watch+harry+potter+prisoner+of+azkaban+putlocker PDF link annotation
    • http://ansonseatery.com/uploads/files/lemev.pdfIn PDF document text
    • http://dichvumucin.com/upload/ckupload/files/78470410531.pdfIn PDF document text
    • https://icon-studios.com/userfiles/file/bodeguginiradeget.pdfIn PDF document text
    • http://lyzebrno.cz/userfiles/file/palewol.pdfIn PDF document text
    • http://s13cf5ef.alojamientovirtual.com/ropadefutbolbarata/userfiles/file/fogirojibikebadulakik.pdfIn PDF document text
    • http://duz-drustvo.si/uporabnik/file/dosegegivok.pdfIn PDF document text
    • http://eamenfaraz.com/cache/fck_files/file/25631208780.pdfIn PDF document text
    • https://egyptsuntours.com/userfiles/files/mokelu.pdfIn PDF document text
    • https://autotronics.vn/userfiles/file/jomigopoforerutep.pdfIn PDF document text
    • http://www.stallionreadymix.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1613478da894d0---zixanidatotekisubum.pdfIn PDF document text
    • http://ukicda.com/admin/fckeditor_upfiles/file/2021091414292980554.pdfIn PDF document text
    • https://humantouchtranslations.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/161469137732cb---vexitoginok.pdfIn PDF document text
    • http://www.kickcommerce.com/userfiles/file/kotipawewaguxulaxojejuxon.pdfIn PDF document text
    • http://milwaukee.center/userfiles/file/jinifafukurad.pdfIn PDF document text
    • http://thefutureofgolf.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1613e31caec525---85969084903.pdfIn PDF document text
    • https://netiko.ge/img/Data/file/68245416983.pdfIn PDF document text
    • http://futimisdev.com/userfiles/file/pesagesobutifuvefov.pdfIn PDF document text
    • http://amandatravel.com/userfiles/file/10746785055.pdfIn PDF document text
    • http://sntaviator.ru/ckfinder/userfiles/files/rinurulunumimadinupej.pdfIn PDF document text
    • http://hcstonetw.com/uploads/files/202109021936511188.pdfIn PDF document text
    • http://ebd.su/UFD/7623/files/81419278219.pdfIn PDF document text
    • https://fentesmakina.com/paket/upload/files/fabagulupi.pdfIn PDF document text
    • http://4chan.ro/UserFiles/file/mimunevowuz.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_off0000b422.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB422 17512 bytes
SHA-256: ad5d54caab671ba6c83ec386a576165e2dad4c426ebde6162046f4a7791fbd51
font_01_sfnt_off0000e1aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1AA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f9c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9C1 11076 bytes
SHA-256: 9e55a3bb1242a9626a064219fa893e7f2a687ad87ca62f92e33eea47af2a1c36