Malicious PDF — malware analysis report

Static analysis result for SHA-256 e33add3917ddb630…

MALICIOUS

PDF

80.0 KB Created: 2021-09-06 07:57:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: bd42bd46019cd335d341d81add511a16 SHA-1: 57267e995873b42f59cc2b95799f8cf0f1ef35f4 SHA-256: e33add3917ddb6309c2abb01136a0d5294bd358c850286e8e533e4e1eea10d4f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by a machine learning classifier and ClamAV as malicious. It contains numerous links, many pointing to compromised CMS uploads and disposable hosting domains, suggesting it's designed to lure users to external sites. The presence of a link farm on disposable hosting and the use of UTM parameters indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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 https://duext.com/wp-content/plugins/super-forms/uploads/php/files/f0613ff89095e03df9474bd7aa996ff9/nemipamibivazebe.pdf In PDF document text
    • http://chiangmai-clean.com/user_img/files/fuguveveleferadonusi.pdfIn PDF document text
    • http://www.platformliften.info/wp-content/plugins/formcraft/file-upload/server/content/files/16098f97996788---rokagalumor.pdfIn PDF document text
    • https://businesslife.com/content/files/zisuterepe.pdfIn PDF document text
    • http://rajskiewakacje.pl/userfiles/file/wunekupebuxib.pdfIn PDF document text
    • https://fonixkoncert.hu/upload/file/23326344235.pdfIn PDF document text
    • https://solarconsulting.org/wp-content/plugins/super-forms/uploads/php/files/e35f3f5fce4ee1d4eeb456bffa83c020/18124913011.pdfIn PDF document text
    • http://adance0112.com/upfile/editor/file/14101578195.pdfIn PDF document text
    • https://www.bouwenaaneensterkwerkgeversmerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609d420e796a1---likij.pdfIn PDF document text
    • https://skyzoan.com/cake/beta/userfiles/file/91545648246.pdfIn PDF document text
    • http://www.barbazan-debat.fr/ckfinder/userfiles/files/jitizo.pdfIn PDF document text
    • http://pestcontroluttara.com/ck/upload/files/50275658851.pdfIn PDF document text
    • https://oddluzanie.net/userfiles/file/rezisakegop.pdfIn PDF document text
    • https://www.hontoys.com.au/wp-content/plugins/super-forms/uploads/php/files/rd8ad70gncoqi479fsj5c3vshs/kovuxegidiwu.pdfIn PDF document text
    • https://accuratesearch.com/userfiles/file/xoriboxelerazab.pdfIn PDF document text
    • https://bakotech.at/uploads/ckeditor/files/51837269223.pdfIn PDF document text
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/3364792d8da2b0f18434d9d4c6ad7a8b/minakudexiniveko.pdfIn PDF document text
    • http://www.naturapreserved.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094617b59f33---819733393.pdfIn PDF document text
    • http://hockeydh.com/files/ups/files/bowovagojirevovegi.pdfIn PDF document text
    • http://aarogyamedico.com/userfiles/file/4559204912.pdfIn PDF document text
    • http://felixefontesadvogados.com.br/ckfinder/userfiles/files/tawiwudagibadupesolanowam.pdfIn PDF document text
    • http://psychologyforeverybody.com/ckfinder/userfiles/files/25736948882.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=bmw+i3+technical+specifications+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_off0000cfc3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFC3 11096 bytes
SHA-256: 1a74efba0e4627adb84574ebac84f155d9105e38244d8aeed26ba08c1bc11db7
font_01_sfnt_off0000e990.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE990 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000101a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101A2 18664 bytes
SHA-256: e34e71777581ec13b3d355750dd3c9c5408bec471a66cfa3decf9e48c07611d5

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