Malicious PDF — malware analysis report

Static analysis result for SHA-256 aba60f26b8911adb…

MALICIOUS

PDF

86.5 KB Created: 2021-06-28 06:13:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: a5c9f624ebf5246170788221e59b84a8 SHA-1: d921932ea7204c8cb61dcd7ecfcbc20d388a8228 SHA-256: aba60f26b8911adb586b44090d985c263f3fd50c9c4f7596efc0ff19327018ca
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It functions as a link farm, directing users to numerous external URLs, many of which are hosted on compromised WordPress sites or disposable domains. The presence of these links suggests an attempt to lure users to malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://deniz-sogutma.org/img/userfiles/file/niwawozarasugujadadof.pdf
    • https://hagepoorter.be/files/files/38977226157.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c5f00027ed---lurorowugexurud.pdf
    • http://bi-acaovo.com/upload/files/zajojizoxodefawopi.pdf
    • https://www.rydalmereprestige.com.au/wp-content/plugins/super-forms/uploads/php/files/v545hkuk2hggt8ptiiog0ov3t0/59718610878.pdf
    • http://totalfinance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160871ad29b42a---98892428260.pdf
    • https://divinesacredshakti.com/wp-content/plugins/super-forms/uploads/php/files/87d1747895de2f752b10b36c5c99b5b9/28111674760.pdf
    • https://www.aserspa.net/wp-content/plugins/super-forms/uploads/php/files/ceqm0ilo5i4okplpjpcqobgdfa/gofedit.pdf
    • https://muzeumkonstancina.pl/attachments/file/soleminim.pdf
    • https://asiatravel.kg/wp-content/plugins/super-forms/uploads/php/files/c0e4d75b104454c580fda280ab9be7d6/21526511003.pdf
    • https://www.asahinafunnels.com/wp-content/plugins/super-forms/uploads/php/files/nq0e4ecjc192p5dtq72sq7dc4i/linitabepulikesono.pdf
    • http://www.zav-mito.si/wp-content/plugins/formcraft/file-upload/server/content/files/16078c1cfac1a3---topatezezu.pdf
    • http://roocenter.ru/upload/file/dogerejeponodulavudop.pdf
    • http://viaterrestre.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160d60e40d3d3a---19021801577.pdf
    • https://teenvolunteerdallas.org/wp-content/plugins/super-forms/uploads/php/files/c2269d771979002b86fe991f50484a32/muwijobefixaju.pdf
    • http://faulkfamilync.com/clients/c/cc/ccb94402b1eed20a0583117be0c0b506/File/21266469725.pdf
    • http://countrysquirefoods.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d61f3d3f7e---juwawumog.pdf
    • https://dispomydeal.com/wp-content/plugins/super-forms/uploads/php/files/de2de88d072cecc3170753a4788a6efc/78705306226.pdf
    • http://discoveryenglish.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a95e9ec6bfe---92257666124.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c9495f74e91---falowikoronira.pdf
    • https://ateneoarbonaida.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b8135b2bb6---tosumiguwusu.pdf
    • http://remontnoedelo.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16079290ce89e9---midojitazetiwesiwipatun.pdf
    • https://mrmobilewebsite.agency/wp-content/plugins/super-forms/uploads/php/files/1eca2bbb35638c54a530e1fb8c2b4874/75630514493.pdf
    • http://www.redactordecontenidos.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160a11857c3a9d---67757051210.pdf
    • http://davcpundri.com/css/file/vajalavaxavapadisiveta.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=how+to+draw+spirit+the+horse
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f18d.bin
c0e52854acfd8a5a4b36cec5482892eb0389ca7d6fb1acc945892a7347a4d8e8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF18D 16804 bytes
font_01_sfnt_off00011d0b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11D0B 16792 bytes
font_02_sfnt_off00013522.bin
5c5489875a4ac29dbaaa171c4a4085f097f9a19a4b0e4812f07c208957c30ce0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13522 10416 bytes

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