Malicious PDF — malware analysis report

Static analysis result for SHA-256 a47cd203b4b6a95a…

MALICIOUS

PDF

82.8 KB Created: 2021-08-14 22:26:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 029cfda2226ba5e24c0c80568633fd7e SHA-1: 0c882a9e117d1e14fc9ebe0127a7702e86923b42 SHA-256: a47cd203b4b6a95af602261f8c098b2e99af05051b909c5376f6829bf04ec1a4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains a link farm pointing to multiple distinct hosts, many of which appear to be compromised WordPress sites utilizing the FormCraft plugin for file uploads. The presence of numerous external URIs and the PDF_SEO_DISPOSABLE_LINK_FARM heuristic suggest this PDF is designed to redirect users to potentially malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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
  • 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.
  • 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 http://gsoam.ge/wp-content/plugins/formcraft/file-upload/server/content/files/160a5d7b824072---sesitulol.pdf In PDF document text
    • http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ea2aaf00c9---pebapeziruveridusiwoforib.pdfIn PDF document text
    • https://tnmkor.com/FileData/ckfinder/files/20210812_BEA68826F0079BC4.pdfIn PDF document text
    • https://www.lamuccacompany.com/wp-content/plugins/super-forms/uploads/php/files/69efc961e3beea142c1656a1da50cf16/vinup.pdfIn PDF document text
    • http://gennarimaq.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160afc360beea7---vabokiwepipesakamunu.pdfIn PDF document text
    • https://realestateconnect.pro/wp-content/plugins/super-forms/uploads/php/files/o26vrj8vcgipk1vp8j8j81q4r2/jivagajokitafegeveb.pdfIn PDF document text
    • http://helder-effect.nl/userfiles/file/55274559924.pdfIn PDF document text
    • http://www.oknookna.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160a2c02aa6133---boxiwatudidupog.pdfIn PDF document text
    • https://www.coconutlodge.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c858d27227d---58590614533.pdfIn PDF document text
    • http://espacioschillout.es/images/admin/file/46835092749.pdfIn PDF document text
    • http://nage-z.com/ckfinder/userfiles/files/dejojukigobudege.pdfIn PDF document text
    • https://jamiatulbanat.in/wp-content/plugins/formcraft/file-upload/server/content/files/1609b75485f350---27633679544.pdfIn PDF document text
    • https://baoholaodong24.com/userfiles/file/sokamoxuwegudat.pdfIn PDF document text
    • http://www.jcca.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/1608c3bf879b75---51033900166.pdfIn PDF document text
    • https://shidoremicrosys.com/media/83249467811.pdfIn PDF document text
    • http://ashioke.com/images/library/File/bevowamivifalasinipesek.pdfIn PDF document text
    • http://shinex-auto.com/userfiles/file/42238236745.pdfIn PDF document text
    • https://wsbe17hongkong.hk/_bin/ckfinder/userfiles/files/28821480427.pdfIn PDF document text
    • http://digemnd.com/UserFiles/file/32808078698.pdfIn PDF document text
    • http://www.mvdisposal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610f396203ad7---14364686971.pdfIn PDF document text
    • https://dezsredstvompx.ru/wp-content/plugins/super-forms/uploads/php/files/de57cafea12963a4a2fb28228666dce2/91802089985.pdfIn PDF document text
    • http://antansconstructions.com/ckfinder/userfiles/files/81948766127.pdfIn PDF document text
    • https://aslimitada.com/userfiles/file/valuvamaled.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=looks+android+wear+watch+faces+apkPDF 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_off0000de68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE68 17488 bytes
SHA-256: 8004d78f0d5477dc80006d2cf2021a47dc8f81cd46b72acf429ed6b53c992d71
font_01_sfnt_off00010c8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C8D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000124a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124A4 10808 bytes
SHA-256: fb651167a2f7af752947b58170bed7f1dadb5ef93d25da8297f8da75e7921533

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