Malicious PDF — malware analysis report

Static analysis result for SHA-256 b54946c070fcf563…

MALICIOUS

PDF

71.7 KB Created: 2021-09-24 06:00:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 18190ddc0782d2eb249260f7dc55f8bc SHA-1: 4b22624c86828d5de41556451170ebcb74f0bd59 SHA-256: b54946c070fcf563893fcb82402317392f88afd1fcf76f21ac272e621d8109c4
164 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript and numerous external URIs, many of which point to compromised CMS uploads or disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to trick users into downloading further payloads or visiting malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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://inwebjor.ru/uplcv?utm_term=download+street+racing+3d+apk PDF link annotation
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16134cb636816d---85401224089.pdfIn PDF document text
    • http://antichigelsi.it/userfiles/files/pinakonufola.pdfIn PDF document text
    • http://eschool365.in/js/admin/uploadfiles/file/kutaritedezifobefov.pdfIn PDF document text
    • https://xlux.vn/wp-content/plugins/super-forms/uploads/php/files/9src9um9cfe83c82ld7k22i3fs/bisaxixog.pdfIn PDF document text
    • https://zahidnawaz.com/UploadedImages/image/39362984215.pdfIn PDF document text
    • http://cleanking.net/userData/board/file/3408821808.pdfIn PDF document text
    • http://mauthietkedep.info/upload/files/66679465380.pdfIn PDF document text
    • http://videofilm-tv.ru/content/File/77917949480.pdfIn PDF document text
    • https://senegal4d.com/contents/files/visefun.pdfIn PDF document text
    • https://kidneystonetreatment.in/userfiles/files/gubuvagulanej.pdfIn PDF document text
    • http://autoneza.cz/UserFiles/File/7351152510.pdfIn PDF document text
    • https://soenen-pneus.com/upload/file/gavufel.pdfIn PDF document text
    • https://nenmongdangquang.com/upload/files/57358312283.pdfIn PDF document text
    • https://trucraftsmanship.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613fb195bedf1---51485762527.pdfIn PDF document text
    • https://beeshark.ro/app/webroot/files/userfiles/files/vegawofaluwebesa.pdfIn PDF document text
    • http://le-bouquet.be/userfiles/files/magibakejidez.pdfIn PDF document text
    • http://ebiocell.com/uploadfile/file///2021090411013027.pdfIn PDF document text
    • http://www.absolutecateringla.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130a48d7806c---89077768939.pdfIn PDF document text
    • http://wagnerpc.com/userfiles/files/dexobanekitesilejataliv.pdfIn PDF document text
    • https://bachson.net/upload/file/49755224917.pdfIn PDF document text
    • https://gberwanda.com/gbe/useruploads/blogs/files/nimijojigixatedina.pdfIn PDF document text
    • http://mnogonomerov.ru/uploads/file/kagufelisamesefusadadiv.pdfIn PDF document text
    • http://vhshf.de/File/tetazorumiwugij.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_off0000b8f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB8F2 11040 bytes
SHA-256: 4981af744f00c1ecb55bfd7c1567f4f4fcd436bb36a72875006e6aec6dd426cb
font_01_sfnt_off0000d2a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2A6 15272 bytes
SHA-256: 77a30901fad3abe893a699196fb2da3a96d9ffa3048a5d4a5bbb79a42834375a
font_02_sfnt_off0000f93e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF93E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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