Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a44453150a7206f…

MALICIOUS

PDF

84.7 KB Created: 2021-09-16 04:36:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: cec63cc4e7c5e78344f3335c9ea592c5 SHA-1: 0cc08a2bdbbed4861d5c2e32468d73fba6455ca1 SHA-256: 2a44453150a7206fd236215e6de4275e76a8a41e93b15e321499821602beb776
134 Risk Score

Malware Insights

MITRE ATT&CK
T1059.007 JavaScript T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, a common technique for malicious PDFs to execute actions. This script likely redirects the user to external URLs, as indicated by the PDF_URI and EMBEDDED_URL heuristics. The numerous URLs and the PDF_SEO_DISPOSABLE_LINK_FARM heuristic suggest a link farm or phishing operation designed to lure users to malicious content. The ClamAV detection and ML classifier further confirm its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://irlanc.ru/uplcv?utm_term=where+is+menu+on+android+phone PDF link annotation
    • http://skulpt.in/admin/uploads/file/tupesugawafezozidu.pdfIn PDF document text
    • http://ge-mak.com/files/visesatop.pdfIn PDF document text
    • http://naturalwonders.com/uploads/files/84897837215.pdfIn PDF document text
    • https://edubox.mn/uploads/users/0/files/vuvineroputanuromanebuxu.pdfIn PDF document text
    • https://cncunse.com/d/files/pixivagagoponinino.pdfIn PDF document text
    • https://hondaotohaiphong.vn/upload/files/2492492515.pdfIn PDF document text
    • https://lmcmanager.com/ckfinder/userfiles/files/39248743308.pdfIn PDF document text
    • https://www.rogierstoel.nl/wp-content/plugins/super-forms/uploads/php/files/38ceomu210ee0noivv5j9ls6ms/biletanofufunifitur.pdfIn PDF document text
    • http://dfwarbitrator.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/vovitabudikolemusebe.pdfIn PDF document text
    • https://bharatiyabhashaparishad.org/ckfinder/userfiles/files/65280081374.pdfIn PDF document text
    • https://handinhand-daycare.com/ckfinder/userfiles/files/tefalamefi.pdfIn PDF document text
    • http://hokkaido-love87.com/app/webroot/js/ckfinder/userfiles/files/45982201360.pdfIn PDF document text
    • http://kmbb.at/userfiles/file/zawirenularuxeme.pdfIn PDF document text
    • http://messtores.ca/fck_user_files/file/24255424714.pdfIn PDF document text
    • http://vimbark.sk/editor_uploads/files/49527610882.pdfIn PDF document text
    • http://immobilieninvestors.eu/userfiles/file/sovelikedonisukutidibe.pdfIn PDF document text
    • https://www.jemelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136dad76c128---9697511550.pdfIn PDF document text
    • https://stillwaiting.org/userfiles/file/38569600469.pdfIn PDF document text
    • http://les-dvorik.ru/userfiles/file/76525138191.pdfIn PDF document text
    • http://ncdesign.it/userfiles/files/rilizebiwulagixanivobes.pdfIn PDF document text
    • https://certifiedcollisionrepair.com/home/cert/public_html/ckfinder/userfiles/files/15055479337.pdfIn PDF document text
    • https://tes-sys.com/uploads/ckfinder/files/20210915/16316903526060.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_off0000e6e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6E4 17620 bytes
SHA-256: e63121e2985341abecd8e2c11ccd30cd71e0cf9e2ee30d883c720b8814ea971d
font_01_sfnt_off000114fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114FD 10604 bytes
SHA-256: 4169835efb2c354f532e2cfb7dc88b02ea95e68cee10f88f239443735707a30a
font_02_sfnt_off00012d06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D06 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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