Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d3b1193dddf67d4…

MALICIOUS

PDF

90.8 KB Created: 2021-06-27 11:01:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 14992674d97bfb9889783c27c8fdcb5f SHA-1: 9f59c38e22e6d832bec3cad4d8a1aba21c2cfe27 SHA-256: 4d3b1193dddf67d4d01976145352430e9314f5318a408a1176e8a2be927685d1
156 Risk Score

Malware Insights

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

This PDF document was identified as malicious by ClamAV and an ML classifier. It functions as a link farm, containing numerous URLs pointing to compromised WordPress sites. These links likely serve as a distribution mechanism for phishing or malware, leveraging the compromised CMS upload functionality.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

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.modianodesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085afc0c6aaf---86556285165.pdf In PDF document text
    • http://capitaloffice.pl/fotki/file/72715018810.pdfIn PDF document text
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bada56d3cdf---30576635555.pdfIn PDF document text
    • https://www.dishdivvy.com/wp-content/plugins/super-forms/uploads/php/files/8288f713c4de14f37021f21aa132c9bc/95819621276.pdfIn PDF document text
    • https://www.denisonlandscaping.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d4696be00f---91150490792.pdfIn PDF document text
    • https://truck-diagnostic.ru/wp-content/plugins/super-forms/uploads/php/files/d80d9cc173b26dd81f2f843ab53006e2/safatamapowuj.pdfIn PDF document text
    • http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607158cf244db---23360718361.pdfIn PDF document text
    • http://jeugdopdewetenschapsagenda.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160cae9e489aa6---95020070072.pdfIn PDF document text
    • http://asalsold.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c7b3b41011a---tifosapuvananutofana.pdfIn PDF document text
    • https://na-nule.ru/wp-content/plugins/super-forms/uploads/php/files/q61k296dd93fsg4140evmqu5c4/mapumuguvutivuguxu.pdfIn PDF document text
    • http://benetalent.com/upload/files/fevalararoporonivow.pdfIn PDF document text
    • http://amatnieks.com/pictures/image/rexiluderez.pdfIn PDF document text
    • https://ehlibeytalimleri.com/resimler/files/ladotefijovetixaxazanano.pdfIn PDF document text
    • http://asu.com.vn/wp-content/plugins/super-forms/uploads/php/files/hbhvkg51utk0vlcrpk21rcumgh/rexitadeludejatos.pdfIn PDF document text
    • https://eyetracking.pl/userfiles/file/xigetuduzokujajelito.pdfIn PDF document text
    • https://esperanzadeavila.com/fotos/file/mobuxibumolaxividoxijofo.pdfIn PDF document text
    • http://www.majoriscambio.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608d42121d9dd---42672120071.pdfIn PDF document text
    • http://omni-links.com/images/blog//file/tidesivoxumunawi.pdfIn PDF document text
    • https://harpethvalleypto.org/wp-content/plugins/super-forms/uploads/php/files/64551c107403fe22f2d030db200dc63b/lagefanoxudez.pdfIn PDF document text
    • https://www.helpforbusymums.com/wp-content/plugins/super-forms/uploads/php/files/bda6d37e76cb99ede5914263ececb430/24332413909.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=verbo+to+drawPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e6fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6FE 10024 bytes
SHA-256: 76a9c2ddc7ecbaf4edce2c0c713f64494bef986960b8c18ab94169f73f4bb156
font_01_sfnt_off0000fd6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD6E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001157f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1157F 16716 bytes
SHA-256: be1b059d7c20fef9ba6b8ccdc1a9d148d229185e3f1bfd36e677770e2a316112
font_03_sfnt_off00012c72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C72 19904 bytes
SHA-256: 8289f161c4fdd9525101ded74ef80122d99375f37dcfd719557502dcb2f9257a

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