Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a76ed9a8d5d4026…

MALICIOUS

PDF

97.0 KB Created: 2021-09-22 17:23:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: f5df37642fceaf94fbadb481a0f92594 SHA-1: e766f53d4a40680fe07b188ef1d2314df1d79ff3 SHA-256: 6a76ed9a8d5d402663897e534710349e3ed9ea02cc362acf43e41d908b43153e
204 Risk Score

Malware Insights

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

This PDF contains embedded JavaScript, which is often used to exploit vulnerabilities or redirect users to malicious sites. Several heuristics indicate the presence of a link farm and compromised CMS uploads, suggesting an attempt to phish or distribute further malware. The ClamAV detection and ML classifier strongly indicate malicious intent, likely involving exploitation of PDF vulnerabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9929

Heuristics 8

  • PRC/3D content in PDF high CVE related PDF_PRC_3D
    PDF contains PRC 3D content. PRC/U3D parsers have been a recurring Adobe Reader attack surface; treat as a related parser-exploit indicator rather than a specific CVE match.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://smidgel.ru/uplcv?utm_term=0123+go+movie PDF link annotation
    • http://www.kocay.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1614230e91a578---23311895243.pdfIn PDF document text
    • http://home-plast.ru/foto/files/gisexinowivulile.pdfIn PDF document text
    • http://thaoduoconline.com/userfiles/image/file/41035841058.pdfIn PDF document text
    • http://birdwatching.sk/media/file/pagidubujosepodu.pdfIn PDF document text
    • http://back2wood.de/userfiles/file/65932958409.pdfIn PDF document text
    • http://paintingservicesonline.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16134aeca5cbaf---31121329975.pdfIn PDF document text
    • https://destockbaby.com/ckfinder/userfiles/files/letagajuse.pdfIn PDF document text
    • http://hyunshin.net/userfiles/file/povojajipu.pdfIn PDF document text
    • https://fetogram.ir/images/upload/files/senadasemuvirurufizujawab.pdfIn PDF document text
    • https://drbumbnursinghome.in/ckfinder/userfiles/files/xumudanobaduwozu.pdfIn PDF document text
    • http://chokmanee.com/userfiles/file/vexikusavigokadom.pdfIn PDF document text
    • http://xn--90afqerdlt1f.xn--p1ai/admin/ckfinder/userfiles/files/rugedu.pdfIn PDF document text
    • http://studioarchterreni.it/userfiles/files/25057645850.pdfIn PDF document text
    • http://autostyle-japan.com/js/upload/files/39400462646.pdfIn PDF document text
    • http://altus.pl/userfiles/file/fakovixilawugojuvaxomi.pdfIn PDF document text
    • http://osteriailgalloelinnamorata.com/userfiles/files/topijesikifidimiz.pdfIn PDF document text
    • http://i-dron.cz/data/file/96034703039.pdfIn PDF document text
    • https://webhostmurah.com/wp-content/plugins/formcraft/file-upload/server/content/files/161316aa99bf16---jagisowavasa.pdfIn PDF document text
    • http://artetendasud.it/userfiles/files/zarekivikoxekokopavit.pdfIn PDF document text
    • https://serviceelectric.ca/userfiles/file/poxelalidimiwo.pdfIn PDF document text
    • http://paykaaluminiya.ru/ckfinder/userfiles/files/61816231851.pdfIn PDF document text
    • https://zagorjeadventureteam.hr/files/jadixetadijafobomesuz.pdfIn PDF document text
    • http://handlpc.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/kenitemivojupewofuloge.pdfIn PDF document text
    • https://hagabb.ro/ckfinder/userfiles/files/tanujosirividawepazuvepiw.pdfIn PDF document text
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/32238290c5a5deed6e2d8b7f9a701507/71457475196.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_off000113ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113CA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00012bdc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BDC 19312 bytes
SHA-256: 4fac0e8bd560f5237d3f000e328a7196f4b30f6f95f5bad7e236ab8deb98e2c0
font_02_sfnt_off00015e7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15E7D 10208 bytes
SHA-256: 2614479dedce36960d6a750981c619480477c3b4f51313586d7f664de568a2fe

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