Malicious PDF — malware analysis report

Static analysis result for SHA-256 1aca69f8203ccdb6…

MALICIOUS

PDF

87.0 KB Created: 2021-08-08 23:07:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 4081e096fa26f226599eba94791d0e42 SHA-1: 20e3ad868f4aa63b40590224f0fa63c16f48585f SHA-256: 1aca69f8203ccdb6a894a0dae00613acb132292029dfd650d67e981d8165fb88
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised CMS uploads and disposable hosting, indicating a link farm or phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were extracted, the structure and URL patterns are consistent with malware designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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 http://evevoyance.fr/adh/.-/file/50513508328.pdf In PDF document text
    • http://www.kickcommerce.com/userfiles/file/4148187274.pdfIn PDF document text
    • https://ural-aiti.ru/admin/ckfinder/userfiles/files/35698271714.pdfIn PDF document text
    • http://ks4073.com/file_media/file_image/file/babokoxa.pdfIn PDF document text
    • https://noithathoaphat11.com/upload/files/97817782829.pdfIn PDF document text
    • https://alianzatours.com/imagenes/file/50522131355.pdfIn PDF document text
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609e421714bbc---sagizuvutasotoga.pdfIn PDF document text
    • https://niboparis.com/upload/fckeditor/files/xuzadonovizobuvokuvapud.pdfIn PDF document text
    • http://www.sevenchurchestour.net/seven/wp-content/plugins/formcraft/file-upload/server/content/files/160d1a06c54927---zodusekutojibubutix.pdfIn PDF document text
    • http://www.vivelamusica.es/wp-content/plugins/formcraft/file-upload/server/content/files/1609fff5f22151---10400519074.pdfIn PDF document text
    • http://tuanayapim.com/rsm/files/63830357585.pdfIn PDF document text
    • http://protech.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/160b414b098798---74299947325.pdfIn PDF document text
    • http://gloria-eurex.com/images/blog//file/nonosag.pdfIn PDF document text
    • https://harryfok.com/ckfinder/userfiles/files/58187736446.pdfIn PDF document text
    • http://enslev-anlaegsservice.dk/userfiles/file/85390075584.pdfIn PDF document text
    • http://inwama4.vn/webroot/img/files/88935087073.pdfIn PDF document text
    • http://fly.no1-yes.com/userfiles/file/85432764703.pdfIn PDF document text
    • https://aquariumfargo.com/wp-content/plugins/super-forms/uploads/php/files/1b69c1068ef24fee5282b5eda3a21ca3/60675756037.pdfIn PDF document text
    • https://kovtec.pl/eurostyl/photos/file/nutizilopidoxobapetik.pdfIn PDF document text
    • https://envida-nieuws.nl/bsb_website/upload_fck/file/vofer.pdfIn PDF document text
    • https://veglifekc.org/wp-content/plugins/super-forms/uploads/php/files//80203592934.pdfIn PDF document text
    • https://www.ezhealthcheck.com/wp-content/plugins/super-forms/uploads/php/files/05hgi964s4c3fhi3euss0j88se/gexapa.pdfIn PDF document text
    • http://cayxaotamphan.net/userfiles/image/file/numep.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=autocad+commands+with+examples+pdf+in+englishPDF 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_off0000eda9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDA9 17820 bytes
SHA-256: 195267a971d0173b0815c378130d2f710226299e48cdd6a6988ea7b6b8aca188
font_01_sfnt_off00011c44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C44 11236 bytes
SHA-256: 15a1c13b2fecac3d96671bbf0994765343879323bca803fe42a0e4fcda6521fe
font_02_sfnt_off0001364d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1364D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1