Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2a60cfbdbc3c569…

MALICIOUS

PDF

82.0 KB Created: 2021-09-08 07:48:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 23900e87fb41522a61c89b878e4b84f8 SHA-1: 654a3d0c1ff95a0032b62d4b4b96247d09a56104 SHA-256: e2a60cfbdbc3c569bd705b9b3dfc080572245c305abe1bc350cbe8b27238ee94
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs pointing to compromised websites and disposable hosting, suggesting a phishing or malware distribution scheme. The presence of these links and the nature of the heuristics indicate the file is likely used to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9911

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://crysiq.ru/uplcv?utm_term=list+of+arts+colleges+in+chennai+pdf PDF link annotation
    • https://www.rydalmereprestige.com.au/wp-content/plugins/super-forms/uploads/php/files/cgqt21d8jobssi1nfmddvabmb4/47638764715.pdfIn PDF document text
    • https://damiel.eu/userfiles/file/79701726290.pdfIn PDF document text
    • https://uleiuri.ro/userfiles/file/zetanajegijexoval.pdfIn PDF document text
    • http://lab4050.com/upload/editor/file/pebibisimimi.pdfIn PDF document text
    • https://banerjeetourspecial.in/ckfinder/userfiles/files/xakiluxogezumufilod.pdfIn PDF document text
    • http://dzstock.com/Upfiles/file/87374517941.pdfIn PDF document text
    • http://aihyang.com/userfiles/file/36001174584.pdfIn PDF document text
    • http://donleroy.net/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/68277694281.pdfIn PDF document text
    • http://jtipartner.com/ckfinder/userfiles/files/kufasodozemavip.pdfIn PDF document text
    • https://www.growxponential.com/wp-content/plugins/super-forms/uploads/php/files/3qrfdfd0ehu54hidb35oi715uk/40147016692.pdfIn PDF document text
    • https://nodka.eu/ckeditor/ckfinder/userfiles/files/butivapadam.pdfIn PDF document text
    • https://songhong-thudo.com/img/files/sipejumomabo.pdfIn PDF document text
    • http://xn--j1aai7d.xn--p1ai/userfiles/file/tadawusadore.pdfIn PDF document text
    • http://holidayinntorino.com/userfiles/files/mapodosaxasugagil.pdfIn PDF document text
    • http://willtorock.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c6adf38868---23107359807.pdfIn PDF document text
    • https://buddingheights.org/wp-content/plugins/formcraft/file-upload/server/content/files/16119639b02a6a---zariwetilamuk.pdfIn PDF document text
    • http://www.musicmaestrodiscos.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160ab2f7264965---6515152619.pdfIn PDF document text
    • http://getvisa.ru/images/File/2241479866.pdfIn PDF document text
    • https://skykharchono.mn/editor/files/fewavulazopusu.pdfIn PDF document text
    • http://birnagarcollege.in/userfiles/file/doses.pdfIn PDF document text
    • http://hoondb.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090acbf9654b---18378280646.pdfIn PDF document text
    • http://cl-pub.com/files/files/86481999144.pdfIn PDF document text
    • http://xn--80aafbanafwvcftiqfecrg2a.xn--p1ai/pict/file/41979260903.pdfIn PDF document text
    • http://travelsi.ru/ckfinder/userfiles/files/38328045671.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610fd5565efbf.pdfIn PDF document text
    • http://www.dadosefatos.net.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607ca2c314629---47626833333.pdfIn PDF document text
    • http://topnotchimports.com/ckfinder/userfiles/files/16069688340.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_off0000dc52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC52 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f464.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF464 17288 bytes
SHA-256: e4d70e92acb2da12c2c75f675cc01cc766d86e294da81b2db46df124ec086096
font_02_sfnt_off00012152.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12152 10856 bytes
SHA-256: 3697258026336eae8a43024ea00b29743d24e2860e82e978146c9ed5116cdc57

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