Malicious PDF — malware analysis report

Static analysis result for SHA-256 9acc8874a28dcf3d…

MALICIOUS

PDF

81.3 KB Created: 2021-06-10 10:17:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: f8153f5516f23572c8b50878e290dc62 SHA-1: 90ddbb56d28e09ed826d265d72ea5e509bccf0af SHA-256: 9acc8874a28dcf3df8ef1a3e1d1f5a01bbef3925dfca8ecb4af73028ffe7369b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as 'Pdf.Phishing.Trojan'. The document contains numerous links to external websites, many hosted on compromised WordPress installations, suggesting a link farm or phishing lure. The presence of 'Raid Shadow Legends' in the document body and a URL parameter indicates a potential social engineering attempt to attract users interested in the game.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://pistant.ru/uplcv?utm_term=raid+shadow+legends+zavia+masteries PDF link annotation
    • http://www.chinahkcarplate.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad2005efd84---towimejosufuvemikumapuwes.pdfIn PDF document text
    • https://davebakeragency.com/wp-content/plugins/super-forms/uploads/php/files/2160691a2b4ddce04f2b9a547b69724d/ninidodilodosi.pdfIn PDF document text
    • http://aksaaydinlatma.com/img/editor/image/file/35871103230.pdfIn PDF document text
    • http://www.trimbleexpress.sk/wp-content/plugins/formcraft/file-upload/server/content/files/160ad8e17ea49b---liwopaxekugemaviw.pdfIn PDF document text
    • http://frangarcia.eu/upload/file/58285123306.pdfIn PDF document text
    • http://cetinelektrik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1609a072a8e96c---tapadobixawimusuxapu.pdfIn PDF document text
    • https://prosegik.com/wp-content/plugins/super-forms/uploads/php/files/737076e8e4e99d3d003a61fddc393f82/28172741364.pdfIn PDF document text
    • http://abimobiliare.pl/pliki/File/46994930960.pdfIn PDF document text
    • https://akapacha.com/userfiles/file/fukemanilom.pdfIn PDF document text
    • https://alatheir.com/atheirwsfiles/file/zudolazuf.pdfIn PDF document text
    • http://audiomaster.se/wp-content/plugins/formcraft/file-upload/server/content/files/1607c1d6a1f9f1---vonetarerak.pdfIn PDF document text
    • https://bonafideonline.com.ar/wp-content/plugins/super-forms/uploads/php/files/a2434b362f4d58a57eb0c8ae4f76eb54/61882274642.pdfIn PDF document text
    • https://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608abbd267c4a---73572890908.pdfIn PDF document text
    • https://yingzhaoliuart.com/upload/file/44645187731.pdfIn PDF document text
    • https://nuregio.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606d51ec295a1---13995864302.pdfIn PDF document text
    • https://www.conkite.com/wp-content/plugins/super-forms/uploads/php/files/1cbd083c57f89f0a637a1674d28c5d8a/diroruvezopawifuzudivi.pdfIn PDF document text
    • http://www.majoriscambio.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160abee296a6ef---sonaluzuganubidodebukapit.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e308.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE308 5448 bytes
SHA-256: c7f4270bbf47b0faba53b92c5ceedc3ef4679f757e5ac80e42c6dc4ed2a59237
font_01_sfnt_off0000f583.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF583 1800 bytes
SHA-256: e9a5a1f6ed95b1e3669933bb00002ad32a1708c3e0b735191cad5e02368a6c7d
font_02_sfnt_off0000fe11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE11 10420 bytes
SHA-256: f7f6ef2c7c9ab0409b0879d005c758e1dd0a6634949fd78feefcd91bf58cbe25
font_03_sfnt_off00012208.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12208 16204 bytes
SHA-256: 10baccb0bc3694c6b0b3b709d044b120dabe07f2e881620bfe1d59e5c3d3621a

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