Malicious PDF — malware analysis report

Static analysis result for SHA-256 1cb308d08e49eb0e…

MALICIOUS

PDF

70.9 KB Created: 2021-09-12 06:01:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 8dd8f13bb5cc68f8459b1ae3ec3c4431 SHA-1: b65c8f53d4225f5a180117d9763f6c656f5f8045 SHA-256: 1cb308d08e49eb0e9f620211396cb67e65e479d68b8c9cfeecf0f08b1dce07e7
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains an embedded JavaScript stream and numerous external URIs, many of which are identified as a link farm on disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The embedded JavaScript is likely used to facilitate the redirection to these malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://juraganmonyet.com/contents/files/sivelazopera.pdf In PDF document text
    • http://ledins.lv/cms/file/9055600318.pdfIn PDF document text
    • https://gtnet-engine.com/ckfinder/userfiles/files/32798995151.pdfIn PDF document text
    • http://retailpark.bg/uploads/wysiwyg/files/34391988540.pdfIn PDF document text
    • https://vettercycles.ch/userfiles/files/goxovebagoduwixatogek.pdfIn PDF document text
    • http://osoboebludo.com/ckfinder/userfiles/files/191121834.pdfIn PDF document text
    • http://fundacionecla.org/resources/original/file/vipofafuluruximatojoru.pdfIn PDF document text
    • https://moraure.net/js/ckfinder/userfiles/files/wuxurexozusobokivoxi.pdfIn PDF document text
    • http://www.integra-cr.cz/administrace/ckfinder/userfiles/files/zidemexuviruzolakox.pdfIn PDF document text
    • http://hasdeu.md/data/userfiles/files/52359419341.pdfIn PDF document text
    • http://xn--9w3b270a7kf.kr/data/editor/file/30412252369.pdfIn PDF document text
    • https://073741256.com/uploads/files/202109110205236872.pdfIn PDF document text
    • https://www.toptalentusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/161306e4f7db85---jalanarevesigi.pdfIn PDF document text
    • https://certifiedcollisionrepair.com/home/cert/public_html/ckfinder/userfiles/files/jejolezubonemalilip.pdfIn PDF document text
    • http://bluebirdcanada.com/FileData/ckfinder/files/20210905_87148867FB0DE4DB.pdfIn PDF document text
    • http://neonatal-surgery.ru/userfiles/files/77197087732.pdfIn PDF document text
    • http://hzzxtl.com/UploadFile/file/20210904122425127.pdfIn PDF document text
    • https://eclipsetheaters.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137ca67b9792---bapuzagaj.pdfIn PDF document text
    • https://labelmarket.pl/data/file/23920658365.pdfIn PDF document text
    • https://mamproducciones.es/wp-content/plugins/formcraft/file-upload/server/content/files/1613d496ff22ec---gipopasule.pdfIn PDF document text
    • http://kennyre.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613cffaf196a1---kigonozudogoz.pdfIn PDF document text
    • http://energy-labels.nl/userfiles/file/zadutunubizesoteved.pdfIn PDF document text
    • https://barcelonacentromedico.es/files/galeria/files/74159520980.pdfIn PDF document text
    • http://oreade-breche.fr/userfiles/file/xivifuf.pdfIn PDF document text
    • http://manisafar.com/basefile/marcosafarir/files/1631127699.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=tomb+raider+apkPDF 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_off0000b552.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB552 16524 bytes
SHA-256: 358fa1c7859079ef6102ed5d5aec9f2bf4b050e8c024eeffd418a04cbe0fbfae
font_01_sfnt_off0000df32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF32 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f749.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF749 10332 bytes
SHA-256: a0427125d5c074989dcc363b19df3b31f7f83c9054361ecc6f351264d9e752ad

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