Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ee921edaadb3e56…

MALICIOUS

PDF

72.4 KB Created: 2021-09-04 08:49:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: f072d05b6c0272af6bad91bb229c1170 SHA-1: 7dc19dd409f69688b70011569e0f79c696e6aba7 SHA-256: 4ee921edaadb3e56393323ad1f0ee97f636e93e8a082e9a8d80963fbbf84c409
164 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript and numerous external links, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware distribution. The embedded JavaScript is likely used to facilitate the redirection or exploit vulnerabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://milsagliksen.org/upload/ckfinder/files/gekadapikuzupabunejemoso.pdf In PDF document text
    • http://stepsforstarlight.ca/clients/c/c6/c668404594a1c08d975ab50c7bec58f6/File/jabawomakamewidub.pdfIn PDF document text
    • http://tractortools.cz/ckfinder/userfiles/files/28335529031.pdfIn PDF document text
    • https://anukulagrotech.com/ci/userfiles/files/72769671954.pdfIn PDF document text
    • https://saraelv.no/wp-content/plugins/formcraft/file-upload/server/content/files/160b9fbcb7383a---nonesuguxe.pdfIn PDF document text
    • http://cathyourhair.nl/js/ckfinder/userfiles/files/nubizowagaxaf.pdfIn PDF document text
    • http://uptownherndon.com/uploads/files/28128751183.pdfIn PDF document text
    • http://absolutelyneon.com/userfiles/file/28530562846.pdfIn PDF document text
    • http://shuimotongyuan.com/userfiles/file/68802776193.pdfIn PDF document text
    • http://www.egavilanes.com/ckfinder/userfiles/files/90786237919.pdfIn PDF document text
    • https://gulfcans.com/home/madarmun/public_html/gulfcans/images/bulk_images/files/vagilarerisujuram.pdfIn PDF document text
    • https://www.masismarketing.com/wp-content/plugins/super-forms/uploads/php/files/af43441943f6545a3df0208af4fd6b1d/woxigimezajuriluw.pdfIn PDF document text
    • http://savages.lu/imagesRTE/files/sifititidezomeluba.pdfIn PDF document text
    • http://1night2daytour.com/ckupload/files/bokidewulegejebitiroram.pdfIn PDF document text
    • http://www.hkqi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160765d4a5f413---wurewuxal.pdfIn PDF document text
    • https://arab-hams.com/Ups/files/pasesemijowovej.pdfIn PDF document text
    • http://gsemilia.it/userfiles/files/kadabobisozapelajex.pdfIn PDF document text
    • http://griswoldremgmt.com/uploads/files/nolukopuvaronob.pdfIn PDF document text
    • https://www.zaantraining.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160d0cc7dadb50---pijudoginiperezulenoseri.pdfIn PDF document text
    • http://emannsltd.com/userfiles/vakobazajep.pdfIn PDF document text
    • http://www.logistiekverbeteren.nl/ckfinder/userfiles/files/30125884690.pdfIn PDF document text
    • http://ducthoaudio.com/upload/files/85977920004.pdfIn PDF document text
    • http://dekoblickfang.de/userfiles/file/fofolutixu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=commutative+property+and+associative+property+worksheetPDF 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_off0000baa6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBAA6 15040 bytes
SHA-256: 48d3ceb2f4540803010febc5718cbfe768424cdc211481809e126d9e9c6340b9
font_01_sfnt_off0000e0aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0AA 11220 bytes
SHA-256: fb715b803d578d55e16532c24cd3b5cc1aec6cd592c0d756961fa9183a538afd
font_02_sfnt_off0000fae6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAE6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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