Malicious PDF — malware analysis report

Static analysis result for SHA-256 fafc0ac74cea331f…

MALICIOUS

PDF

90.1 KB Created: 2021-07-09 01:01:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: b35359fdb34b25e9cba07c94ed47083a SHA-1: 37da5dc3c5217ac86f532aed9d3816f69f1a3eb0 SHA-256: fafc0ac74cea331f7767341478eeb5686d96035f61ceac4e952aaf162270da02
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier, indicating malicious intent. It contains numerous links to external websites, many of which appear to be hosted on compromised CMS platforms or disposable hosting, suggesting a phishing or malware distribution campaign. The presence of embedded URLs and the overall structure point towards an attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9822

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://ketchas.ru/uplcv?utm_term=lung+cancer+that+has+metastasized+to+the+brain PDF link annotation
    • https://k2salight.com/wp-content/plugins/super-forms/uploads/php/files/0004bdcdc2fc6e9f287fb4a65b725de1/25465185435.pdfIn PDF document text
    • https://al-farh-iq.com/upload/userfiles/file/xivetexekupixerobu.pdfIn PDF document text
    • https://unitedcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8cbe5cd566---41891826652.pdfIn PDF document text
    • https://www.diktu.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cd25949200---pavofirusurovotokegafite.pdfIn PDF document text
    • http://basyapiemlak.com/yukleme_klasoru/userfiles/file/vagojojejatixuvuvudagi.pdfIn PDF document text
    • http://www.norestim.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160b890e7e84b7---vegeverofabukaga.pdfIn PDF document text
    • http://yao-cheng.com/uploadfiles/20210623032458.pdfIn PDF document text
    • https://deepankarbasu.com/FCKeditor/file/90107734527.pdfIn PDF document text
    • http://madmojo.com/fckupload/file/jiwuduvinoruterodolamiwi.pdfIn PDF document text
    • https://gearforfree.com/wp-content/plugins/super-forms/uploads/php/files/do1i8u91d7vdkubp8pkdp43mru/43360673846.pdfIn PDF document text
    • https://www.pferde-fuer-unsere-kinder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a43f6508836---3791802995.pdfIn PDF document text
    • https://tecsal.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a1dbf2b48e9---fodofezinifurebazefixi.pdfIn PDF document text
    • https://www.toptalentusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608fb0d0905fe---29337033623.pdfIn PDF document text
    • https://www.denisonlandscaping.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b87e17dab1d---75144062107.pdfIn PDF document text
    • https://www.hotelamoha.it/wp-content/plugins/formcraft/file-upload/server/content/files/160ada83bdd565---7683557570.pdfIn PDF document text
    • https://swotin.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b77369ac1dc---tilimefafizuwarozalon.pdfIn PDF document text
    • http://pulsrmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096e640ae023---jawexipusujebebajoduke.pdfIn PDF document text
    • https://stagerightstaging.com/wp-content/plugins/super-forms/uploads/php/files/158379b0bfa64c34dd004d2d5126986f/silivasejinozovexokefo.pdfIn PDF document text
    • http://wumag.pl/userfiles/file/taguraxafaluwoji.pdfIn PDF document text
    • https://mrmobilewebsite.agency/wp-content/plugins/super-forms/uploads/php/files/50bfa03d60c9ef398997b75107e40a9b/xulevonumolegopur.pdfIn PDF document text
    • https://www.helmmsp.ca/wp-content/plugins/super-forms/uploads/php/files/ba803078c2182df7c5dccffd8849a43f/kenepebojutob.pdfIn PDF document text
    • http://cleannshieldflorida.com/wp-content/plugins/super-forms/uploads/php/files/c76c6e595e18a11e1f0e30d5ecd20083/84224365515.pdfIn PDF document text
    • https://www.jemelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a43fa70035e---kapavojenogop.pdfIn PDF document text
    • https://cortemadera.com/wysiwygfiles/file/lovusanak.pdfIn PDF document text
    • http://vnndt.com/Images_upload/files/junolem.pdfIn PDF document text
    • https://www.arphplumbing.co.uk/wp-content/plugins/super-forms/uploads/php/files/tbkdj7v4t47setkte1bfm3uok2/81731185679.pdfIn PDF document text
    • http://pvhs1980reunion.com/clients/e/e5/e5e9f74eb83211af097e98bf68d59c4c/File/fanozuwulixawetupemovasim.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_off0000fd76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD76 11028 bytes
SHA-256: 3d5752439564bfbd294555e43d1e4da6c60224bff981402036d30f6ec21c118d
font_01_sfnt_off000116c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116C3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012ed5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12ED5 16724 bytes
SHA-256: 32670acd18ef9dae7715616fb6bb925b17e3a5bd26b948e19df6e785a34ef286

Open this report in the interactive analyzer, or submit your own file for analysis.