Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec867bc9676962d1…

MALICIOUS

PDF

75.5 KB Created: 2021-09-12 01:23:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 207a1b4d5987bc963214127e3595aadc SHA-1: 63e8ccc1177fe57ae29973d4c9ae0de579c896b8 SHA-256: ec867bc9676962d1ae2b52b912e3607527a64d40fe3a26da23604990d1a99c8c
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a link farm pointing to compromised WordPress sites, suggesting an attempt to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The embedded JavaScript is likely responsible for executing malicious actions or facilitating the download of further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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://www.abaco-engineering.it/wp-content/plugins/formcraft/file-upload/server/content/files/161315b3a2df2f---96044882302.pdf In PDF document text
    • http://fotosvatba.net/userfiles/file/bozefizofumosezugowe.pdfIn PDF document text
    • http://wignaccent.com/FCKeditor_2.6.3/userimages/file/20210902011306.pdfIn PDF document text
    • http://longruiglass.com/ckfinder/userfiles/files/20210910_235748.pdfIn PDF document text
    • https://binhruamuinanobac.com/wp-content/plugins/super-forms/uploads/php/files/t9ses0d6srniou0ct07kkjqmog/tomuxuzobu.pdfIn PDF document text
    • https://reviewz.eu/app/webroot/files/userfiles/files/24238020051.pdfIn PDF document text
    • http://chinazzjx.com/d/files/65797924956.pdfIn PDF document text
    • http://ebiocell.com/uploadfile/file///2021091205081717.pdfIn PDF document text
    • http://alfavs.eu/userfiles/file/guxet.pdfIn PDF document text
    • https://suhrsmad.dk/wp-content/plugins/formcraft/file-upload/server/content/files/16139a822ed580---92193394307.pdfIn PDF document text
    • https://keiba-like.biz/js/ckfinder/userfiles/files/jisizibizadagosuvifinefot.pdfIn PDF document text
    • http://jplus-ag.com/upload/files/BodyFile__6130300CAA3E2.pdfIn PDF document text
    • http://joshuadacosta.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b75ff5bd03---nukotokuwawoxewozo.pdfIn PDF document text
    • http://myphamasia.net/upload/files/27819147462.pdfIn PDF document text
    • http://abwbaltimore.com/uploads/files/wogiduxofukukezo.pdfIn PDF document text
    • http://eschool365.in/js/admin/uploadfiles/file/vonudokuwexagesetomuvu.pdfIn PDF document text
    • https://branchennachweis.eu/userfiles/file/40643188346.pdfIn PDF document text
    • http://thumpamonpally.com/userfiles/file/80285945936.pdfIn PDF document text
    • https://led7.ru/file/viletizoka.pdfIn PDF document text
    • https://regiefranchet.fr/userfiles/files/wedevokexofuk.pdfIn PDF document text
    • http://gidaero.com/upload/fckeditor/file/79173111753.pdfIn PDF document text
    • http://planet-for-events.de/userfiles/file/legawiwedidi.pdfIn PDF document text
    • https://qnzar.com/files/josibe.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=barbie+fashion+mod+apkPDF link annotation
    • http://crossfit28.com.s125853.gridserver.com/siteuploads/editorimg/file/26135896298.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_off0000c3d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC3D1 16944 bytes
SHA-256: 67a57c19e16b780072f365e314409eba94126a3d0d6c4aff5c4e47551f93846e
font_01_sfnt_off0000efcb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFCB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000107e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107E2 10904 bytes
SHA-256: 5329980077e8d0dfa12ab6213e44388be05faeddf7e5047c1d573177e65e9a24

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