Malicious PDF — malware analysis report

Static analysis result for SHA-256 d62b24b3e531c5bd…

MALICIOUS

PDF

74.2 KB Created: 2021-09-11 09:53:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: 9ea4e2f22f92c3b7ea0a0df2eda600b1 SHA-1: 034fa248439ba2cac6c12946077fc3bee44b9901 SHA-256: d62b24b3e531c5bdd83237477f49d3884d66cd0b4833e0a1baaf86f01f2bd1d0
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 links, many pointing to compromised WordPress sites or disposable hosting, indicating a malicious intent to redirect users. The ML classifier and ClamAV detection strongly suggest this PDF is malicious, likely serving as a lure for phishing or malware distribution. The embedded JavaScript is likely responsible for executing the malicious payload or redirecting the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://adurucui.com/ckfinder/files/28789212694.pdf In PDF document text
    • http://thucphamchucnangmy.vn/uploads/files/94492097068.pdfIn PDF document text
    • http://biznesfishki.ru/files/userfiles/files/sonodolixo.pdfIn PDF document text
    • http://odesignlab.ru/admin/ckfinder/userfiles/files/diwazog.pdfIn PDF document text
    • http://www.virtualaid.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16138883027358---wowugutuvosojikave.pdfIn PDF document text
    • http://www.icareonline.net.au/ckfinder/icare/files/gobilotariwurumobi.pdfIn PDF document text
    • http://cjmfgx.morefriendship.com/upload/files/28121606987.pdfIn PDF document text
    • https://guptajimarriagebureau.com/userfiles/file/55480411636.pdfIn PDF document text
    • http://thuocamakong.net/userfiles/image/file/ruzekaxuzug.pdfIn PDF document text
    • http://aihyang.com/userfiles/file/50637711038.pdfIn PDF document text
    • https://kvizek.hu/ckfinder/userfiles/files/dubofu.pdfIn PDF document text
    • https://hiddencliff.kr/FileData/ckfinder/files/20210909_713A3738C2BC5DD7.pdfIn PDF document text
    • https://www.quatainvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16139258f3924d---8199243807.pdfIn PDF document text
    • http://hzzxtl.com/UploadFile/file/20210910124938725.pdfIn PDF document text
    • http://sun-marche.com/app/webroot/js/ckfinder/userfiles/files/jasagurinuxuva.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16139c7a6f0733---82953404801.pdfIn PDF document text
    • http://happy-land.hu/editor_up/bifigupegemilos.pdfIn PDF document text
    • http://bisenzia.it/userfiles/files/guwilotunitopukodel.pdfIn PDF document text
    • http://studiofranzoni.eu/userfiles/files/bimesidirawameweloratej.pdfIn PDF document text
    • http://sdds.be/userfiles/file/89534357550.pdfIn PDF document text
    • https://fminterativa.net/cms/plugins/ckfinder/userfiles/files/vatudakifokazujarexajok.pdfIn PDF document text
    • https://ilexgold.com/app/webroot/files/userfiles/files/19902435243.pdfIn PDF document text
    • http://flywings.sk/UserFiles/file/numinakarutidoretafudum.pdfIn PDF document text
    • https://cremeconferences.com/wp-content/plugins/super-forms/uploads/php/files/d2bf644411314a5f4c3b76026edda10c/vularamovalefejasaxifef.pdfIn PDF document text
    • http://chatfieldfarms101.com/userimages/14343969.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=tonos+de+notificacion+android+descargarPDF 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_off0000c092.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC092 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d8a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8A4 16696 bytes
SHA-256: 0a3f569e14220586ca8ff5b785c0ebf27d372230c78aabfff5053b983bac4e85
font_02_sfnt_off0001029e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1029E 10568 bytes
SHA-256: 8dcdecd1682ace2fa92e1f8249b7ce28a5721f7659720098f27c09d3c76b7195

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