Malicious PDF — malware analysis report

Static analysis result for SHA-256 488322a4d58d6d52…

MALICIOUS

PDF

201.6 KB Created: 2021-07-07 08:52:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 98b89f6c8b21086bce1cfd57670bac14 SHA-1: 855cade3037da43f2fd2f59384680d676b927cb6 SHA-256: 488322a4d58d6d52f5d7451d04c0a33232bc04dcdb1f6d1d75b2f602c5461d21
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was detected as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It contains numerous links to compromised WordPress upload storage, indicating a likely phishing or malware distribution lure. The PDF's structure and embedded URLs suggest it is intended to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9800

Heuristics 5

  • 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.
  • 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://ketchas.ru/uplcv?utm_term=how+long+does+it+take+to+grow+a+blackberry+bush PDF link annotation
    • http://www.virtualaid.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160a96cd7cbbe2---kodurobebizuvepapu.pdfIn PDF document text
    • http://www.idenet.net/wp-content/plugins/formcraft/file-upload/server/content/files/160d220e56f63f---63910661543.pdfIn PDF document text
    • https://fiambreszav.com/wp-content/plugins/super-forms/uploads/php/files/ef0c0ab5541a43de5dd36ea8bcbb3c01/lumaku.pdfIn PDF document text
    • https://evenimentecastel.ro/wp-content/plugins/super-forms/uploads/php/files/34tmss9hcftpphe45fkk713l84/lujodavezuwudasebibirawiw.pdfIn PDF document text
    • https://ohligschlaeger-berger.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607e174cb29b8---91013415701.pdfIn PDF document text
    • https://www.msolartop.cz/wp-content/plugins/formcraft/file-upload/server/content/files/1607f082249a0e---13993917295.pdfIn PDF document text
    • https://nam.it/wp-content/plugins/formcraft/file-upload/server/content/files/1609f4a2bc3e68---rorabelimatazexawubo.pdfIn PDF document text
    • https://capitaleny.com/wp-content/plugins/super-forms/uploads/php/files/b9d0a3a1c93f741ad2aec8340584a61f/xolowuwowa.pdfIn PDF document text
    • http://breakevenpoint.pl/uploads/editor/file/dezomile.pdfIn PDF document text
    • http://ducthoaudio.com/upload/files/14395080417.pdfIn PDF document text
    • http://glamour-nsk.ru/ckfinder/userfiles/files/fetusonutozirilar.pdfIn PDF document text
    • https://halobysciton.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ce831b1aa37---rejuxifamuzik.pdfIn PDF document text
    • http://clearlakesd.org/wp-content/plugins/formcraft/file-upload/server/content/files/16081ddb9906da---bakunub.pdfIn PDF document text
    • https://comesa.com.pe/wp-content/plugins/super-forms/uploads/php/files/u7orgjjlvscsn12mhrk2c7u9v4/suzupekekefifafasixewo.pdfIn PDF document text
    • http://sanga.asia/userData/board/file/zoriguzadixugafifuv.pdfIn PDF document text
    • http://yasaitogo.com/uploads/files/mejiwavepuvixul.pdfIn PDF document text
    • http://grappin-annat-como.com/userfiles/grappin-annat-como.com/file/tuwolevaxu.pdfIn PDF document text
    • https://ocvirapuato.com.mx/wp-content/plugins/super-forms/uploads/php/files/15f5bfc5cd98b966d2de6cdd5e936b90/92152205714.pdfIn PDF document text
    • http://www.nisbd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dc70cfd0c4e---61575757007.pdfIn PDF document text
    • https://monuments-msk.ru/wp-content/plugins/super-forms/uploads/php/files/2dab113ced9440a604062a8ef497322a/23028149842.pdfIn PDF document text
    • https://zakarpattya-tour.com/upload/35148859872.pdfIn PDF document text
    • http://hillandcunnreunion.com/clients/864369/File/fixolexubunedavexoreb.pdfIn PDF document text
    • https://rmissio.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16071e105bc8e8---wokopovapofufosu.pdfIn PDF document text
    • https://www.federatedlighting.com/wp-content/plugins/super-forms/uploads/php/files/615f06da7719dd92fcec9d6dbdb5031e/nawazapududanonomodofaruj.pdfIn 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://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_off0002b431.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2B431 11172 bytes
SHA-256: 36b967a0c8a950e17625431c6039c54714cee030c8eb77daf18bffc995669f3d
font_01_sfnt_off0002ce1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2CE1A 18144 bytes
SHA-256: c39c20274af60f8e17241c99c78e2b8dc1dfb2fa3e2db178faca033a400a6136
font_02_sfnt_off0002fdde.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FDDE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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