Malicious PDF — malware analysis report

Static analysis result for SHA-256 eec47305c1b11b5d…

MALICIOUS

PDF

80.1 KB Created: 2021-09-18 14:59:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: df79fd1b48c59e2a28bf683da0689bbf SHA-1: 00f0512796e572c5fefafbda9b664caa21975df3 SHA-256: eec47305c1b11b5dfc9865fd8f7149e6e27086a1ab1bdcd81d351f147759f682
224 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript and multiple external links, some hosted on compromised WordPress sites or disposable domains, indicating a phishing attempt. The heuristic 'SE_SECRET_RECOVERY_LURE' strongly suggests the document's purpose is to trick users into revealing sensitive recovery secrets or private keys, potentially related to cryptocurrency or account access. The ML classifier and ClamAV detection further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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
  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • 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://fentesmakina.com/paket/upload/files/466939335.pdf In PDF document text
    • http://strandedtattoo.info/file/lafowuze.pdfIn PDF document text
    • http://greenlivinggarden.com/htdocs/UserFiles/file/gakiminopedadebegot.pdfIn PDF document text
    • https://iringmalaysia.com/ckfinder/userfiles/files/nobaxikuxedaxi.pdfIn PDF document text
    • http://trainternational.in/wp-content/plugins/formcraft/file-upload/server/content/files/161405e102caaa---dejuzapamugil.pdfIn PDF document text
    • http://magicfood-cn.com/files/20210916131537.pdfIn PDF document text
    • http://simp-q.ru/userfiles/file/luxifelefabikorub.pdfIn PDF document text
    • https://readxyz.com/wp-content/plugins/super-forms/uploads/php/files/b22bb884c2c652600f375b0e242a859d/lojusakapaporajaruje.pdfIn PDF document text
    • http://xy-interior.com/uploads/files/202109082248254246.pdfIn PDF document text
    • https://pmms-online.com/assets/file/zisabejomoxi.pdfIn PDF document text
    • https://phnews.ro/files/file/70633887782.pdfIn PDF document text
    • https://suprastoc.ro/userfiles/file/85430951234.pdfIn PDF document text
    • https://rtquery.reitoken.org/Coaching123/images/files/91585839779.pdfIn PDF document text
    • https://snapstudios.ca/userfiles/file/4069305640.pdfIn PDF document text
    • https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/3961b548c1d387dbef0b2a2c45964bee/rokolerudolumeruwari.pdfIn PDF document text
    • http://optimaglobal.net/ckupload/files/fanorazidomewulofute.pdfIn PDF document text
    • http://nagakuratrading.com/js/upload/files/17250767464.pdfIn PDF document text
    • http://ophtalmic-overnight.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16139b9db14a5a---99421579287.pdfIn PDF document text
    • https://netron.pt/app/webroot/media/files/31301129690.pdfIn PDF document text
    • http://goraku-sangyo.com/userfiles/file/44536864779.pdfIn PDF document text
    • https://vickers-electronics.co.uk/wp-content/plugins/super-forms/uploads/php/files/e448fc6c535c10ff2b121ed649df4402/sowalironusike.pdfIn PDF document text
    • https://anzhero-sudzhensk.verlauf-ekb.ru/admin/ckfinder/userfiles/files/25479990899.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=adb+commands+list+pdfPDF 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_off0000d6d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6D4 10672 bytes
SHA-256: 4e3472793748356c670b22883b3371c505ef8539ccec3c24f2b639d2b371a318
font_01_sfnt_off0000ef03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF03 16704 bytes
SHA-256: 6dced087a7dde3751a152ed5da1561a1bacc89b02ffd62484aab37ca5318bfa7
font_02_sfnt_off00011ac0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AC0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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