Malicious PDF — malware analysis report

Static analysis result for SHA-256 df234dd3364ae460…

MALICIOUS

PDF

85.8 KB Created: 2021-08-15 12:56:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: e1c24e16a9da949429fdafe8f3eebcff SHA-1: 48c3e8094e852b5e36524c3ec80e0930ac289d09 SHA-256: df234dd3364ae46045c9584e248357ac2150671401e7e9222e1de941e6ca2fa7
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, directing users to multiple external websites, many of which are hosted on compromised CMS platforms or disposable domains. The presence of numerous links, including those pointing to WordPress upload storage, suggests an attempt to distribute malware or phish for credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9957

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://www.fifatravels.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a45aa4de71f---31425609585.pdf In PDF document text
    • https://mfdesign.hu/files/file/sodenujutisisiwirazafevef.pdfIn PDF document text
    • http://www.hj-bouwt.be/wp-content/plugins/formcraft/file-upload/server/content/files/1608c7c8c3feeb---15296659226.pdfIn PDF document text
    • http://truhlarstvisollner.cz/data/file/gininitod.pdfIn PDF document text
    • http://dotacjedlaoze.pl/userfiles/file/miduxizepowe.pdfIn PDF document text
    • https://technok.cz/wp-content/plugins/super-forms/uploads/php/files/d42d82e4f7f824e64e5e7cab852978af/12612181273.pdfIn PDF document text
    • http://reversetheclocknow.com/ckfinder/userfiles/files/76774020554.pdfIn PDF document text
    • http://biancoacolori.it/userfiles/files/kidixukupegaven.pdfIn PDF document text
    • https://morethancars.eu/uploads/edytor/file/67074496374.pdfIn PDF document text
    • http://amfmeg.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c8ea21bc575---38630870448.pdfIn PDF document text
    • http://4seasonstours.in/userfiles/file/39356150682.pdfIn PDF document text
    • https://alexandrapanayotou.com/web/images/static/file/momozajuworupax.pdfIn PDF document text
    • http://kystop.com/wp-content/plugins/super-forms/uploads/php/files/0cjeig7h3a0qlnfckdailasm66/56349037306.pdfIn PDF document text
    • https://gbagencement.fr/uploads/file/xijisazemug.pdfIn PDF document text
    • https://ecodiagnost.com/ckfinder/userfiles/files/femalazamaf.pdfIn PDF document text
    • https://allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/31f322da01ed34517de61fd13e7060cc/66648711398.pdfIn PDF document text
    • http://gayaarchi.com/userfiles/file/20210617142919.pdfIn PDF document text
    • https://chocoinmobiliario.com/wp-content/plugins/super-forms/uploads/php/files/761188baec2cfeefa0d42b9fe71b117a/limizoxirixokibibovojumep.pdfIn PDF document text
    • http://sl-light.ru/design/img/upload/file/mesumejugudafibaw.pdfIn PDF document text
    • https://www.cedicar.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080771b8b0d9---68362322678.pdfIn PDF document text
    • http://ngor2-3.com/file_media/file_image/file/gewupin.pdfIn PDF document text
    • http://haohanlegend.com/Uploadfiles/files/fuwobidejego.pdfIn PDF document text
    • https://www.pal-kont.hu/wp-content/plugins/super-forms/uploads/php/files/54716719984dffcf17d3c24c1d936b73/42187690066.pdfIn PDF document text
    • https://www.schroedersales.com/wp-content/plugins/super-forms/uploads/php/files/af6782bc6fc96954c2a662b5f5e02418/nazuzitixiramapiki.pdfIn PDF document text
    • https://cradlegold.com/wp-content/plugins/super-forms/uploads/php/files/0pdt9ar19oehfhkh9a3kta9llg/vejefi.pdfIn PDF document text
    • http://goldenpeak.it/userfiles/files/xobizidadusiladujigadepev.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=how+to+get+free+robux+2020+realPDF 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_off0000e972.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE972 10684 bytes
SHA-256: bf785a4adc71bb9a3b29dc07353acb13c814c90e079006394d6e07fb49aa23e1
font_01_sfnt_off00010238.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10238 17780 bytes
SHA-256: 4b843d66684c2925f9cc00efe607ed1a8759d531257c9f498088f24b45c3f016
font_02_sfnt_off000130c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x130C9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1