Malicious PDF — malware analysis report

Static analysis result for SHA-256 b18f7218bff2b071…

MALICIOUS

PDF

81.3 KB Created: 2021-09-20 20:03:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 8484d47ac6b1e372e5bf5becdeda42ca SHA-1: 15c21cd97c535b09ca042d356005b00849ba818a SHA-256: b18f7218bff2b07140e9a70599da6a2be31b01cb1ea44f22b55bc3d16270d927
172 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF contains embedded JavaScript, which is a common technique for delivering malicious payloads. The presence of multiple links to compromised or disposable hosting sites, coupled with a high ML classifier score and ClamAV detection, strongly indicates a phishing or malware distribution attempt. The embedded JavaScript likely facilitates the download and execution of a second-stage payload from one of the external URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 8

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://lodoshosting.com/calisma2/files/uploads/98254259072.pdf In PDF document text
    • http://hftyby.com/upload_fck/file/2021-9-20/20210920194658278418.pdfIn PDF document text
    • http://polymer-optix.de/userfiles/file/lonomopefud.pdfIn PDF document text
    • http://spiregene.com/image/files/20210915_135413.pdfIn PDF document text
    • http://salsainkonstanz.de/media/files/25357208544.pdfIn PDF document text
    • http://notariocprietoa.com/notaria/documentos/files/79541639630.pdfIn PDF document text
    • https://nocnepal.org.np/ckfinder/userfiles/files/58532176719.pdfIn PDF document text
    • http://njchemland.com/upload/files/5928655813.pdfIn PDF document text
    • https://athensviptour.com/wp-content/plugins/super-forms/uploads/php/files/fa0d354c969c69b1f1e507aba1ad1402/88757064797.pdfIn PDF document text
    • http://guanzhuli.com/userfiles/file/garedom.pdfIn PDF document text
    • https://vongtaytramhuong.vn/upload/files/54428646466.pdfIn PDF document text
    • http://architectureanddesign.it/userfiles/files/suxozasemulukagawor.pdfIn PDF document text
    • http://e3edu.vn/public/ckfinder/core/connector/php/connector.phppublic/uploadsfiles/tuzam.pdfIn PDF document text
    • https://insights3.com/wp-content/plugins/super-forms/uploads/php/files/1852f5c0f4a06204bf13595b650ab975/4691243326.pdfIn PDF document text
    • http://aviapartner.biz/js/ckfinder/userfiles/files/kaxewogife.pdfIn PDF document text
    • http://kamienneogrody.com/userfiles/file/xekused.pdfIn PDF document text
    • http://byecook.com/ckupload/files/82866994459.pdfIn PDF document text
    • http://orosweb.hu/ckfinder/userfiles/files/78511491977.pdfIn PDF document text
    • http://www.teaterskolen-efteruddannelsen.dk/ckfinder/userfiles/files/58470918895.pdfIn PDF document text
    • http://etenindex.nl/images/uploads/fomozawobogixanoxono.pdfIn PDF document text
    • https://www.cocochan.com.pk/wp-content/plugins/super-forms/uploads/php/files/19c5a95b125a3c875383705b06f39a5a/wubofuwofapofivupokires.pdfIn PDF document text
    • https://ropaalmayoreo.com/images/userfiles/file/43213171333.pdfIn PDF document text
    • http://dambi.pl/userfiles/file/55566050190.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=download+rocky+handsome+full+moviePDF 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_off0000d918.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD918 17140 bytes
SHA-256: 4693a581fa6e884312f929de08aa734aa3b7e032807715ec8ccb733d95038d4c
font_01_sfnt_off00010572.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10572 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011d89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D89 11100 bytes
SHA-256: 227d6978d2b600e071690d7ccc6ea5b3414c686339086c4dcb69f64c48a4d065

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