Malicious PDF — malware analysis report

Static analysis result for SHA-256 d786dfa3896ea422…

MALICIOUS

PDF

74.6 KB Created: 2021-09-13 08:59:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 1ea20d0cef93b7fc351b2ac7ff509ff8 SHA-1: 33baef057a8804886290cc31e5997cbd10a69c07 SHA-256: d786dfa3896ea42239932acbebcfd9ecebe7610785117d1584bb65db89d4ff93
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which point to compromised websites or link farms. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded JavaScript likely facilitates the redirection or execution of further malicious content, while the link farm serves to obscure the ultimate destination, potentially leading to phishing or malware downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 7

  • 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://pixomot.ru/uplcv?utm_term=hd+tv+apk+2020 PDF link annotation
    • http://medrea.ru/upload/files/48371602299.pdfIn PDF document text
    • https://keiba-like.biz/js/ckfinder/userfiles/files/13472917169.pdfIn PDF document text
    • http://vincentianssjp.com/userfiles/file/73959428030.pdfIn PDF document text
    • http://cnmrobotics.com/files/files/33423595582.pdfIn PDF document text
    • http://mecaniquekd.ca/upload/file/xixidajokewukamonotitupar.pdfIn PDF document text
    • https://thehideawayresortpattaya.com/userfiles/files/68297457037.pdfIn PDF document text
    • https://sentinels.ro/userfiles/file/1584893058.pdfIn PDF document text
    • http://xn--brneneskontor-landsforening-b0c.dk/userfiles/file/sozexeziba.pdfIn PDF document text
    • http://scard.vn/app/webroot/uploads/files/56307323446.pdfIn PDF document text
    • http://sdds.be/userfiles/file/wijitiruner.pdfIn PDF document text
    • https://ceadersvalet.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c0892a8d94---roratime.pdfIn PDF document text
    • https://onecre.com/images/content/files/73181833079.pdfIn PDF document text
    • https://hgindustrial.eu/userfiles/files/bedesefudofo.pdfIn PDF document text
    • http://1utilaje.ro/mm/file/gojopozuj.pdfIn PDF document text
    • https://getadoc.in/ckfinder/userfiles/files/8751521867.pdfIn PDF document text
    • http://www.ufolep-69.com/contenus/files/54814023946.pdfIn PDF document text
    • http://emachn.com/data/attachment/file/lorulafevojakem.pdfIn PDF document text
    • https://bawwabatrizq.com/userfiles/file/67339389079.pdfIn PDF document text
    • http://pieseclimaauto.com/files/file/kuvolopexosadudunujuvusex.pdfIn PDF document text
    • http://casavacanzesanvito.eu/userfiles/files/36082967500.pdfIn PDF document text
    • https://kayakbranson.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139c5e1de20f---nufisufelam.pdfIn PDF document text
    • https://borderpak.com/wp-content/plugins/super-forms/uploads/php/files/a32525ff2a9174b15647b27a1c0fc59e/lufofevunafekef.pdfIn PDF document text
    • http://ontis.sk/editor_uploads/system/files/pubevewejipebalozub.pdfIn PDF document text
    • https://padservhosting.com/userfiles/file/22584678604.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_off0000c1bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC1BF 10012 bytes
SHA-256: 6f78c67bf7b0ce16e340ddf5350ad37a9c9ca319c5fc66e8dbb7084ede696a62
font_01_sfnt_off0000d81e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD81E 17492 bytes
SHA-256: 03f00c51740fee7d5a699191574ead63d979342dfa23893b7bc868a98c6c5980
font_02_sfnt_off00010548.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10548 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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