Malicious PDF — malware analysis report

Static analysis result for SHA-256 02ae3608f648c066…

MALICIOUS

PDF

85.4 KB Created: 2021-08-15 23:26:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-07
MD5: 90378b3d1b6866e387c6bd41438e434d SHA-1: 7886d7f27ee144c91d5d0b270e0cb371831cae59 SHA-256: 02ae3608f648c066aba2e3fffb3fe53e1a2478b678b05d97915498f97c4c1e09
156 Risk Score

Malware Insights

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

This PDF was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. It functions as a link farm, directing users to various domains, some of which are hosted on compromised CMS uploads. The presence of numerous external URIs and the PDF_SEO_DISPOSABLE_LINK_FARM heuristic suggest an attempt to manipulate search results or redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://www.sport-konyv.hu/userfiles/file/87899114592.pdf In PDF document text
    • http://taiwan-casters.com/userfiles/file/jerixefesolilifu.pdfIn PDF document text
    • http://muntepa.com/userfiles/files/67745020004.pdfIn PDF document text
    • https://brianhigbielaw.com/UserFiles/file/getinas.pdfIn PDF document text
    • https://www.endthestigmacounselling.com/wp-content/plugins/super-forms/uploads/php/files/leje4mom7u4f2b5astsbht5m0f/56647041415.pdfIn PDF document text
    • https://houstoncoinshow.org/FCKeditor/file/42495629886.pdfIn PDF document text
    • https://dentinale.eu/wp-content/plugins/super-forms/uploads/php/files/541da9def810c0fb6172649659c05cbe/ranurexuxaxuz.pdfIn PDF document text
    • http://cosmickino.ru/sadm_files/pesag.pdfIn PDF document text
    • https://fairtradeportal.pl/userfiles/file/tigagubakedexadaxuwe.pdfIn PDF document text
    • http://bukvoznaika.ru/ckfinder/userfiles/files/72703866462.pdfIn PDF document text
    • https://ag-concept.ru/wp-content/plugins/super-forms/uploads/php/files/39153b5c3112c68ef898dc538db782d1/kuninolifuk.pdfIn PDF document text
    • http://julieesteban.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e4d13dd7223---noseraj.pdfIn PDF document text
    • http://bracyfamilyreunion.com/clients/c/c2/c2db1a97f769835965582c74015c7782/File/medexemowexexo.pdfIn PDF document text
    • http://boulderdivorcelaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a11b1756dcc---26049091707.pdfIn PDF document text
    • https://www.reflectionuk.com/wp-content/plugins/super-forms/uploads/php/files/omc5kpqeik80ghq3dkfud6jhrs/rinirifusube.pdfIn PDF document text
    • http://mobilephleb.com/clients/2/2d/2d2188d13063160162e6e2bbcdac547d/File/16285693103.pdfIn PDF document text
    • https://brunoamaranti.it/wp-content/plugins/super-forms/uploads/php/files/h8moqj3opnuao3kuegmoimq3v3/90728644558.pdfIn PDF document text
    • https://burlingame.com/wysiwygfiles/file/72960627178.pdfIn PDF document text
    • https://californiaoptionsrealestate.com/wp-content/plugins/super-forms/uploads/php/files/8484827dd0f9444492aa563a04bf55b6/zezefidunofusosanaf.pdfIn PDF document text
    • https://www.ayersworthglen.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e82e83b9a9---79917217271.pdfIn PDF document text
    • http://woonhuislift.info/wp-content/plugins/formcraft/file-upload/server/content/files/160779d36df4b0---kubabedude.pdfIn PDF document text
    • https://elsa-daulte.com/ckfinder/userfiles/files/57193490252.pdfIn PDF document text
    • http://stressmanagement-karriere.de/userfiles/file/43897113839.pdfIn PDF document text
    • https://razdolle.by/wp-content/plugins/super-forms/uploads/php/files/5q2mtefq6dqjh8lng2iurmgcg0/lagetuvaw.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=guided+meditation+script+for+third+eye+chakraPDF 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_off0000e8ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8EA 16408 bytes
SHA-256: 3872b95d4405912c6630c785c025c4f4522a9c1cded2d2375fa155a4b657849e
font_01_sfnt_off0001134a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1134A 11184 bytes
SHA-256: 6cae7cac2cd8d0bb774d997dd9abc31fcf52129f8772cebf05c02a27f7f2f7a3
font_02_sfnt_off00012d59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D59 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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