Malicious PDF — malware analysis report

Static analysis result for SHA-256 afe0f1fecb37f65b…

MALICIOUS

PDF

98.1 KB Created: 2021-07-24 01:43:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: f5c996619529c958a3cbc07ffa769c1f SHA-1: cfe186f67f2134b9e8c1a574bebfdcbff65bb508 SHA-256: afe0f1fecb37f65b0ca6fb50082e3abdd470b575b7002e858096bc7f0f7a1119
156 Risk Score

Malware Insights

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

This PDF was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains a link farm pointing to multiple compromised WordPress upload directories and other disposable hosting, suggesting an attempt to distribute malicious content or conduct phishing. The document body is heavily obfuscated and appears to be non-readable content, further indicating a malicious intent rather than legitimate document content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://reflexlighting.com/wp-content/plugins/super-forms/uploads/php/files/8a9f263f39d061a09054fe165cabdb99/notixojirisug.pdf In PDF document text
    • https://amesmedicalservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e252bc2b74---21718445992.pdfIn PDF document text
    • http://www.musicmaestrodiscos.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160b45527f24d8---98409001953.pdfIn PDF document text
    • http://btc-ltd.com/upload/file/nuxogiriwo.pdfIn PDF document text
    • https://bednidhitraders.com/userfiles/file/safepuparanokeb.pdfIn PDF document text
    • http://askort.pl/Upload/file/97426764379.pdfIn PDF document text
    • http://wearefamily1234.com/clients/3/31/31b46d3307e4516335aa88350909469c/File/nopim.pdfIn PDF document text
    • http://www.theagentpipeline.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079906a01b71---detis.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7c770de9ee---wajagobadokakawiv.pdfIn PDF document text
    • https://endoaccessories.com/wp-content/plugins/super-forms/uploads/php/files/kjgp7b7hlhqo3psb6koip3dbk6/8406406885.pdfIn PDF document text
    • http://for-rent-leuven.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ddc74e326af---zexev.pdfIn PDF document text
    • http://bagpack.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/160b0d3bf66c0a---gakuxujajugona.pdfIn PDF document text
    • http://chocolatycakes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b9a1667eee---14658506674.pdfIn PDF document text
    • https://bluetact.com/locktactyuma/userfiles/file/dufola.pdfIn PDF document text
    • https://swimproject.eu/wp-content/plugins/super-forms/uploads/php/files/851bdd3e2526a688b75efe9dacf0a405/29415938196.pdfIn PDF document text
    • http://www.prieteniitehnicii.ro/documente/file/dobonujiloparuziluz.pdfIn PDF document text
    • http://breakevenpoint.pl/uploads/editor/file/23080895026.pdfIn PDF document text
    • http://www.1atlanticfunding.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b97b29f0f08---57598583202.pdfIn PDF document text
    • http://aaexpansionjoint.com/wp-content/plugins/formcraft/file-upload/server/content/files/160786d8916e31---36758081496.pdfIn PDF document text
    • http://designbeginnings.com/upload/file/puxigesatudapobiseje.pdfIn PDF document text
    • http://kosmonautika.ee/ckfinder/userfiles/files/13858151647.pdfIn PDF document text
    • https://go2germany.ru/files/file/fakoka.pdfIn PDF document text
    • https://www.reachcast.ca/wp-content/plugins/super-forms/uploads/php/files/858069002e7353e612b40ec37f0cc2dd/33990816380.pdfIn PDF document text
    • http://ipost.mn/ckfinder/userfiles/files/zilebedomeledu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=what+are+three+examples+of+nonverbal+communicationPDF 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_off00011ce2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CE2 16596 bytes
SHA-256: 1b7ba1febfd3e7405d7d191237337843c0097b750c6ad6717965772aef1074c0
font_01_sfnt_off000147ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x147EA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00016001.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16001 11144 bytes
SHA-256: 1c60513ea86332f07e139d3b8d912e06656acff1601d9d122c57c40ad2c2ba88

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