Malicious PDF — malware analysis report

Static analysis result for SHA-256 c8dbb7f80f7e4b78…

MALICIOUS

PDF

96.5 KB Created: 2021-09-22 13:50:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 737238049a9058cde89466538b95d9c9 SHA-1: da3f16eea62ed2bf63f6744ae3b766ed3a385185 SHA-256: c8dbb7f80f7e4b78f75e994a6f9301cec41d58486e76fbe38abc17665503a18f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a link farm directing to numerous URLs, several of which are hosted on compromised WordPress sites or disposable domains, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. No scripts were extracted, but the structure and URL patterns are indicative of a malicious document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

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://webmba.fr/client/logo/file/35477680144.pdf In PDF document text
    • https://sensiblemachines.com/ckfinder/core/connector/php/files/77734456423.pdfIn PDF document text
    • http://seosanhrd.com/userfiles/file/64967214439.pdfIn PDF document text
    • https://manajrgvaaradhi.com/cms-uploads/files/kebefabefeveresud.pdfIn PDF document text
    • http://nhatminhtrading.vn/app/webroot/uploads/files/vavedisokojenapixagitop.pdfIn PDF document text
    • http://voyagevietnamlaos.com/hinhanh/file/96761037205.pdfIn PDF document text
    • https://efckrakow.pl/userfiles/file/68261499715.pdfIn PDF document text
    • http://www.ibadirect.com/wp-content/plugins/formcraft/file-upload/server/content/files/161464efde594c---24193445042.pdfIn PDF document text
    • https://demo-calson.garment-pro.com/ckfinder/userfiles/files/divesesalunuto.pdfIn PDF document text
    • https://amthanhanhsangchinhhang.vn/upload/files/lekasixene.pdfIn PDF document text
    • https://sasalidayanisma.org/uploads/file/37362053845.pdfIn PDF document text
    • https://yastudio.net/wp-content/plugins/super-forms/uploads/php/files/f0c0ba37f5aaee0a9657b7186ff6e65a/82682828255.pdfIn PDF document text
    • http://www.altrus.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16134133810735---5667109416.pdfIn PDF document text
    • https://mabuksusu.com/contents/files/bexotiz.pdfIn PDF document text
    • http://timebymtm.com/upload/files/resemawibadagoged.pdfIn PDF document text
    • https://nceptionsolutions.com/wp-content/plugins/super-forms/uploads/php/files/3dc3202a25235c26afe63de2f7eef856/vipejonikukasixadedasid.pdfIn PDF document text
    • https://bazk.info/public_htmluploads/file/nepizigakudemimir.pdfIn PDF document text
    • https://hmv.ir/wp-content/plugins/formcraft/file-upload/server/content/files/161337921ea9f7---jixotipiw.pdfIn PDF document text
    • http://6nergy.fr/6nergy/sites/default/user/file/nifos.pdfIn PDF document text
    • http://vektor-bezpeki.com/userfiles/files/ketezivolovemof.pdfIn PDF document text
    • http://soncongnghiepjotun.com/media/ftp/file/gatopojinizibu.pdfIn PDF document text
    • http://rhondadejean.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/zasowewibevowires.pdfIn PDF document text
    • http://baugeraeteverleih.de/benutzerdateien/28547548567.pdfIn PDF document text
    • http://delve-cr.com/uploads/55813360330.pdfIn PDF document text
    • https://synersys.fr/contenu/file/dobogixufelenokofi.pdfIn PDF document text
    • https://rossbeede.com/userfiles/file/77883625452.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=practical+electronics+for+inventors+pdf+free+downloadPDF 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_off00010d5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D5C 20536 bytes
SHA-256: 0476a06e65b7cc583c9cf297cd350a2432fd3b1af9e7fbb290be2ff6f1448aef
font_01_sfnt_off0001426c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1426C 10768 bytes
SHA-256: 1615d6a4858c83710b210a997d8f708a6f616038916bb89b29214da5aa6abdf4
font_02_sfnt_off00015b5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15B5F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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