Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3b710aa20c2c939…

MALICIOUS

PDF

68.3 KB Created: 2021-10-01 04:03:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: a88bfaeed311c29b53fbf2e972aa969f SHA-1: 755b91fa7da1ec62d390e811c19701b2643a0f86 SHA-256: d3b710aa20c2c939e4420f6887ac912b8e602ea85f041a10833044a6d0a5c50e
184 Risk Score

Malware Insights

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

This PDF document exhibits characteristics of a phishing lure, including a screenshot-like appearance and embedded links to external sites. The presence of embedded JavaScript, flagged by heuristics, suggests an attempt to execute malicious code or redirect the user. The numerous links to potentially compromised or disposable hosting sites further support the malicious intent, likely for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 68 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://snapstudios.ca/userfiles/file/zivupizugu.pdf In PDF document text
    • http://studionegro.net/userfiles/files/50975542985.pdfIn PDF document text
    • http://stainless-faucet.com/uploads/htmlupload/files/numeleputubetudekubul.pdfIn PDF document text
    • http://studiotecnicomartani.eu/userfiles/files/55647033382.pdfIn PDF document text
    • http://hophungvietnam.com/app/webroot/uploads/files/75539633532.pdfIn PDF document text
    • http://thuexe7cho.vn/upload/files/purafep.pdfIn PDF document text
    • https://www.verpoort-bouw.be/wp-content/plugins/formcraft/file-upload/server/content/files/161311fd2d040d---kulimumofix.pdfIn PDF document text
    • http://cdenito.net/userfiles/file/garabukoxotavetozewuzolar.pdfIn PDF document text
    • http://3e3i.com/UserFiles/file///35567823168.pdfIn PDF document text
    • http://www.vinoplaza.nl/img/upload/files/29730144452.pdfIn PDF document text
    • http://www.velkoobchod-man.eu/ckfinder/userfiles/files/27513192634.pdfIn PDF document text
    • http://orderkiwicafe.com/uploads/files/15201975486.pdfIn PDF document text
    • https://thebookonpersonaltransformation.com/FCKeditor/file/dojoloserozifad.pdfIn PDF document text
    • http://piannocreativo.com/js/new/fckeditor/userfiles/file/61715315697.pdfIn PDF document text
    • http://vers-ma.de/userfiles/file/jatazuvesidefamegob.pdfIn PDF document text
    • http://krasneclanky.cz/uploads/54505317267.pdfIn PDF document text
    • http://adanateknikservis.web.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1614745dff3927---37580590838.pdfIn PDF document text
    • http://imagespa.mx/wp-content/plugins/formcraft/file-upload/server/content/files/16135e56d2b270---boxefirisotibifoz.pdfIn PDF document text
    • http://clairerolo.com/userfiles/file/4187810428.pdfIn PDF document text
    • http://basumati.com/app/webroot/ckfinder/userfiles/files/92564458304.pdfIn PDF document text
    • https://beautydiction.com/ckfinder/userfiles/files/65358221790.pdfIn PDF document text
    • https://editora-arara-azul.com.br/site/admin/ckfinder/userfiles/files/7675115235.pdfIn PDF document text
    • http://akiyastyle.com/app/webroot/js/ckfinder/userfiles/files/roxuxevafezaluxofumez.pdfIn PDF document text
    • https://chorland-dining.com/webroot/editor-uploads/files/kuvofu.pdfIn PDF document text
    • https://mytekas.com/UserFiles/file/87981916624.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=the+revolution+starts+at+home+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_off0000afc2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAFC2 14036 bytes
SHA-256: 23e58521bba768c011ce968d4d16b73dc6c6009624c33a1177c21ab76ca8c32c
font_01_sfnt_off0000d293.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD293 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000eaaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAAA 10892 bytes
SHA-256: a6916703fb497b04fff40e46527ae39fae413dd64ac3c7bb171a779f9e70015a

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