Malicious PDF — malware analysis report

Static analysis result for SHA-256 6af070669ede22ca…

MALICIOUS

PDF

70.2 KB Created: 2021-10-02 21:55:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: b31ab19d48c72ae9014bdb8164c1dce6 SHA-1: f72e523680ca6f040e55637a65b6ad4e2caa56df SHA-256: 6af070669ede22ca11fb8aa28cbce137ca71c79fde2a1c873422d368df5c3fc2
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF contains embedded JavaScript and numerous external links, many of which point to disposable hosting or compromised CMS upload directories. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to deliver a phishing lure or download a second-stage payload. The embedded JavaScript is a primary indicator of malicious activity within the PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9916

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://infrive.ru/uplcv?utm_term=polk+county+notice+of+commencement PDF link annotation
    • http://vititanon.com/user_img/files/tepuj.pdfIn PDF document text
    • https://maryamghiasi.com/images/upload/files/nubadegeripapitigu.pdfIn PDF document text
    • https://temahr.hr/files/nofogavarateketivefobazi.pdfIn PDF document text
    • http://lexus-custom.com/js/upload/files/xiligewedanal.pdfIn PDF document text
    • https://virtualpulse.eu/UserFiles/file/dusazebomulumodemenam.pdfIn PDF document text
    • https://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/161318beceb5e7---garutevawagekawew.pdfIn PDF document text
    • http://nuraski.pl/wsg/userfiles/28023304891.pdfIn PDF document text
    • https://nam.it/wp-content/plugins/formcraft/file-upload/server/content/files/161323ba19ecdb---funamalezep.pdfIn PDF document text
    • https://www.hit-education.com/wp-content/plugins/super-forms/uploads/php/files/dng9f1rh663c9fllbgv5s5iidc/22482813711.pdfIn PDF document text
    • http://zbirozskepodzamci.cz/userfiles/87570811903.pdfIn PDF document text
    • https://tp-pos.com/uploads/image/files/nonuxudixum.pdfIn PDF document text
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/2a3d532c3fc9ab277402a3d4700d6ae0/fisafesofepuzaguselapu.pdfIn PDF document text
    • http://caogenzhiben.com/filespath/files/20210901192632.pdfIn PDF document text
    • http://lapenya.cat/imgjovesnaves/file/70746095302.pdfIn PDF document text
    • https://dampinggame.com/calisma2/files/uploads/letije.pdfIn PDF document text
    • https://jaukiaplinka.lt/ckfinder/userfiles/files/goguruxumasakoroniv.pdfIn PDF document text
    • http://grimastone.ru/files/jatezim.pdfIn PDF document text
    • http://spain-ex.com/images/blog/file/99612064759.pdfIn PDF document text
    • https://doanhnghiepvietnam.niengiamdoanhnghiep.vn/img_duhoc/files/2223861253.pdfIn PDF document text
    • https://cubic.is/userfiles/file/21695955913.pdfIn PDF document text
    • http://www.fd.ntou.edu.tw/ckfinder/userfiles/files/lagedutojaluwojajeve.pdfIn PDF document text
    • https://gulf-rope.com/images/bulk_images/files/67934379728.pdfIn PDF document text
    • http://ceresasrl.it/userfiles/files/17228905673.pdfIn PDF document text
    • https://fullgame.hu/uploads/files/xevetazofozirozepejere.pdfIn PDF document text
    • https://bentzendesign.se/wp-content/plugins/formcraft/file-upload/server/content/files/1614cf6e016f81---65033424411.pdfIn PDF document text
    • https://www.jnvhardoi.org/ckfinder/userfiles/files/15842129299.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_off0000b4e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB4E3 15100 bytes
SHA-256: ff8e1494a1c034bcf238ab60f16d300c141820bded101858eccff7c38fb0d15b
font_01_sfnt_off0000db30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB30 10372 bytes
SHA-256: da9e34831e528363df12c4a3c230e9288f72c771b3d58eb4a158787dba6f2601
font_02_sfnt_off0000f2a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2A9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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