Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ea29b6f76fae5ec…

MALICIOUS

PDF

78.3 KB Created: 2021-09-10 15:50:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 02f5a1bb0b5d6cdaabc6e57c80c80f27 SHA-1: 48a672d7447e327defa5c9bd2a032d37ab4b9d8c SHA-256: 0ea29b6f76fae5ec93329aa6ee0939b3e1fec9a47381acb6e36c5c97a9de673c
156 Risk Score

Malware Insights

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

The PDF was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, with many URLs pointing to potentially compromised websites or disposable hosting. The presence of numerous links, including those on compromised CMS uploads and disposable domains, strongly suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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 http://derkwoo.com/upload/editor/files/kizopiguxuxep.pdf In PDF document text
    • https://aurorabersinar2.com/contents/files/77868741088.pdfIn PDF document text
    • https://mepho.hu/ckfinder/userfiles/files/19205713666.pdfIn PDF document text
    • https://www.limratechnologies.net/wp-content/plugins/formcraft/file-upload/server/content/files/16139b7f5aa0d5---20669104442.pdfIn PDF document text
    • https://taperagi.com/contents/files/87557598700.pdfIn PDF document text
    • http://nguoigiupviec99.com/webroot/img/files/73133247285.pdfIn PDF document text
    • http://caopump.com/admin/userfiles/file/39459932740.pdfIn PDF document text
    • https://fuze-pay.com/ckfinder/userfiles/files/75091574835.pdfIn PDF document text
    • https://solelane.com/ckfinder/userfiles/files/vomoxovadela.pdfIn PDF document text
    • http://obras.ru/sites/default/files/uploads/16134844907.pdfIn PDF document text
    • http://cgpreceptor.com/ckfinder/userfiles/files/91659480214.pdfIn PDF document text
    • https://www.revistadefiesta.com/wp-content/plugins/formcraft/file-upload/server/content/files/161376041d3bba---44447186232.pdfIn PDF document text
    • http://tw-jia.com/uploads/files/202109080202553992.pdfIn PDF document text
    • http://union.travel/ckfinder/userfiles/files/gumisamotogolibulumep.pdfIn PDF document text
    • http://perles-del-beya.com/userfiles/file/7683526140.pdfIn PDF document text
    • https://www.accidentinjuryalbuquerque.com/wp-content/plugins/super-forms/uploads/php/files/lur8k8pok978skgrvt9k6jksmq/kuzunakogogonoxonijef.pdfIn PDF document text
    • https://geniodelweb.com/file/luzevulexokiveforibazib.pdfIn PDF document text
    • http://hissekurban.com/resimler/files/78565116132.pdfIn PDF document text
    • https://europacreativaeuskadi.eu/files/galeria/files/12863764184.pdfIn PDF document text
    • https://episcopiaoradiei.ro/files/37333064494.pdfIn PDF document text
    • https://eminencesolutions.in/resources/userfiles/file/kugesenefosaxiziwa.pdfIn PDF document text
    • https://www.bbmnetlicitacoes.com.br/cms/ckfinder/upload/files/90276943353.pdfIn PDF document text
    • http://hertzlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/tasapexadebifarifo.pdfIn PDF document text
    • http://leaguengn.com/userfiles/file///sonulepelaruguzatokeriki.pdfIn PDF document text
    • http://wannawwannie.pl/userfiles/file/murexipi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=facetime+compatible+with+androidPDF 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_off0000cf33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF33 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e745.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE745 16952 bytes
SHA-256: a97e4262d31d7c6ee95e0e37cf4724d68975ebd1368a36353c5fe6bb8d347a14
font_02_sfnt_off000112e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112E0 10816 bytes
SHA-256: ed9d285946e7be47cd09783f7b207929c7903fb9fc02f354058da181f7c92142

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