Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8d618008c3f26ce…

MALICIOUS

PDF

75.5 KB Created: 2021-09-13 06:02:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 71d4f76dfe36caab74784e2efb43f11e SHA-1: ace12b244fb62f50d1c31966d507ede5448570c9 SHA-256: d8d618008c3f26ce8aaa945238c64df486541c79fc23f9303e0c68905b916566
164 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript, which is a common technique for executing malicious code within documents. Several heuristics indicate the presence of link farms pointing to compromised or disposable hosting, suggesting an attempt to redirect users to malicious sites. ClamAV detection and ML classification further support its malicious nature, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9827

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 http://www.ih-consultant.com/ckfinder/userfiles/files/nalojugedokemezodidu.pdf In PDF document text
    • https://vibangthuaphatlai.net/uploads/files/93797970566.pdfIn PDF document text
    • http://garderoba.sk/images/_file/tilasugux.pdfIn PDF document text
    • https://konyaalotaksi.com/userfiles/file/fofilezosagodaxafuzi.pdfIn PDF document text
    • http://blessingsngo.in/userfiles/files/44274152033.pdfIn PDF document text
    • http://espressobuilders.com/app/webroot/files/userfiles/files/vinakixedovavesoparaji.pdfIn PDF document text
    • http://architettoseneca.com/userfiles/files/71013052619.pdfIn PDF document text
    • https://alcoquimicos.com/ckfinder/userfiles/files/zasazovotafakili.pdfIn PDF document text
    • https://longhoang.vn/upload/files/tarirofesojekepuf.pdfIn PDF document text
    • https://sudhirsachdevaclasses.com/ci/userfiles/files/7389964096.pdfIn PDF document text
    • https://k85shj16h-561lt.com/contents/files/66396993622.pdfIn PDF document text
    • http://jadever.vn/Images_upload/files/xomavopewuko.pdfIn PDF document text
    • https://motiwalainstitutes.org/userfiles/file/21335225331.pdfIn PDF document text
    • http://awarelaxcentrum.cz/user_files/file/18324715123.pdfIn PDF document text
    • http://cuboni.com/uploadfile/hong202109080651493388.pdfIn PDF document text
    • http://perila-vrn.ru/userfiles/file/83156268463.pdfIn PDF document text
    • https://wacee.net/wp-content/plugins/formcraft/file-upload/server/content/files/16134c38347d1f---wipurumuwutote.pdfIn PDF document text
    • http://dragonspond.com/uploads/files/koteseva.pdfIn PDF document text
    • https://corumosmanlimakina.com/js/ckfinder/userfiles/files/75707399854.pdfIn PDF document text
    • https://fallsplat.se/bildbank/file/jijijosesosijufexok.pdfIn PDF document text
    • http://philipp-haberland.de/images/upload/file/47235631812.pdfIn PDF document text
    • http://alisawedding.com/upload/users/files/jalivolesamulufuxelawe.pdfIn PDF document text
    • http://kystar.net/filespath/files/20210908224738.pdfIn PDF document text
    • https://robertmatzuzi-massagetherapist.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16133c26488922---gewamewakibaxalomi.pdfIn PDF document text
    • http://friluftsgruppen.se/wp-content/plugins/formcraft/file-upload/server/content/files/1613d8714edee4---49199326891.pdfIn PDF document text
    • http://intechsol.kz/wp-content/plugins/formcraft/file-upload/server/content/files/1613d24f0e2c5f---vamazixe.pdfIn PDF document text
    • http://zkqzl.com/uploadfile/file///2021091106331553.pdfIn PDF document text
    • http://c-amc.com/upload/files/negefejijesinemojizobu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=the+ladies+of+the+house+2013+full+movie+watch+onlinePDF 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_off0000c11d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC11D 11320 bytes
SHA-256: 8b5adc362a83b8355b7daa2b165f5078cfb3a1be606366e1afa2efdb2e51049c
font_01_sfnt_off0000dbb8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBB8 16936 bytes
SHA-256: 77e813a7e32fb3edb4ad8d0686947d692be57bd4b220b443549e8cbcadccf9d9
font_02_sfnt_off00010785.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10785 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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