Malicious PDF — malware analysis report

Static analysis result for SHA-256 acc852ddcf43ff13…

MALICIOUS

PDF

83.5 KB Created: 2021-09-06 16:01:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: baf224ef5fc50cd3294e54b7064c54bc SHA-1: db13d544e0d09694aa5aeb1f2060f4b4e3ae6651 SHA-256: acc852ddcf43ff1385f80ada6032ab11fe6114c3c9fc7144cdcb24629cf87c14
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ML classifiers and ClamAV. It contains numerous embedded URLs pointing to compromised WordPress sites, suggesting a phishing or malware distribution campaign. The presence of these links indicates an attempt to redirect the user to malicious content, likely exploiting the 'Spearphishing Attachment' technique.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 5

  • 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.
  • 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://www.lbf-cosmetics.com/website/wp-content/plugins/formcraft/file-upload/server/content/files/1610a278ac57aa---basuruwugowozatelaje.pdf PDF link annotation
    • http://phutungototuanphat.com/img-tvdl/files/soluxatogefuxudotuwolo.pdfIn PDF document text
    • https://funkydrop.shop/wp-content/plugins/super-forms/uploads/php/files/f1c4643bc2d3ee474e5ad80187a7da27/56115378559.pdfIn PDF document text
    • http://walker-doss.com/clients/4/45/450b4a4af5ff3f13851793278d9c7ef8/File/wutexakapivutibakug.pdfIn PDF document text
    • https://asiatravel.kg/wp-content/plugins/super-forms/uploads/php/files/bacfda928968aee5679671639b426de8/resotokavopotovi.pdfIn PDF document text
    • https://altonika.pro/files/fck/file/tagoriwigetos.pdfIn PDF document text
    • http://klhl.com/userfiles/file/35015065203.pdfIn PDF document text
    • https://shiokuda2.com/contents//files/lepesav.pdfIn PDF document text
    • https://ballestermultiservicios.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e5e5dd5c6db---82750389504.pdfIn PDF document text
    • http://bestbuyfromindia.com/userfiles/file/55847835551.pdfIn PDF document text
    • http://caycanhtuyhien.com/uploads/image/files/ganipigogop.pdfIn PDF document text
    • http://vankouwenenmastop.nl/UserFiles/file/92320632411.pdfIn PDF document text
    • http://antansconstructions.com/ckfinder/userfiles/files/48079363331.pdfIn PDF document text
    • http://www.thebetterinsurance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2e9b9da106---66420161543.pdfIn PDF document text
    • http://vtaky.sk/media/file/20229288943.pdfIn PDF document text
    • http://mobilenmr.com/files/files/5902932183.pdfIn PDF document text
    • http://minerva-collection.net/files/files/38529822079.pdfIn PDF document text
    • http://bridgesonthepark.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa597a48d86---misux.pdfIn PDF document text
    • http://poltinka.ru/userfiles/file/21192523859.pdfIn PDF document text
    • http://projectbudapest.hu/wp-content/plugins/formcraft/file-upload/server/content/files/160a9af5293f7b---96211581729.pdfIn PDF document text
    • http://vladjurnalist.ru/archive/file/sidepobalepoluniwit.pdfIn PDF document text
    • https://hk-delight.com/UploadFiles/file/xatozapevewaketekedox.pdfIn PDF document text
    • http://hutergroup.de/userfiles/file/12170110687.pdfIn PDF document text
    • http://aaaexpressheating.com/userfiles/file/68216958987.pdfIn PDF document text
    • https://fenicia.uy/fenicia.com.uy/uploads/files/39773332274.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_off0000e2f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2F7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fb0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB0E 10668 bytes
SHA-256: c59a5f2b9b91c15ece63037cb64cc6c0c2d798ad59f30532154b25c796483fca
font_02_sfnt_off000113a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113A7 17472 bytes
SHA-256: 65151d56c481ee225cecbfe664298e2d06dc658204e41762b8a41c3b52e3a4d4