Malicious PDF — malware analysis report

Static analysis result for SHA-256 49032aa9b7d24cbd…

MALICIOUS

PDF

80.2 KB Created: 2021-09-06 12:45:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 4ec6f8763efc71cb1c128e02870e8484 SHA-1: 7265afeadfe44fbb729174d6be07dcd7f6d2e12c SHA-256: 49032aa9b7d24cbd8a7d04b1e65ac376ebd6ad5cb5cae2184c65b4f017c2bae3
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external URIs and link farm heuristics, indicating its primary purpose is to redirect users to potentially malicious websites. The ClamAV detection and ML classifier strongly suggest this PDF is a phishing or malware distribution vehicle. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious intent to lure users to compromised or malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://crysiq.ru/uplcv?utm_term=download+buku+laskar+pelangi+pdf PDF link annotation
    • http://blbr365.com/userfiles/file/1621364553.pdfIn PDF document text
    • https://kar360.com/resimler/files/fagewexopufumekope.pdfIn PDF document text
    • http://ei-windykacja.pl/upload/file/52936269578.pdfIn PDF document text
    • http://tavernadelsnoguers.com/wp-content/plugins/super-forms/uploads/php/files/aa4f9d9bdf9a22f137d92f80a45dbfc0/80571153065.pdfIn PDF document text
    • https://www.waterlooarmsnewforest.co.uk/wp-content/plugins/super-forms/uploads/php/files/f8409869d8d51635cafa27620d3e5bcb/79886359872.pdfIn PDF document text
    • https://grandhotelbulgaria.com/userfiles/file/kasefixenaguvam.pdfIn PDF document text
    • https://rrvchefs.com/wp-content/plugins/super-forms/uploads/php/files/c46cf97bbe5a276916e11ebf6100ed56/garifuvosikofojilasof.pdfIn PDF document text
    • https://jjmassociates.com/wp-content/plugins/super-forms/uploads/php/files/f0332f82c8312d2ba5c6118d766e8f4a/91463435392.pdfIn PDF document text
    • https://onhimalayas.com/ckfinder/userfiles/files/54413125264.pdfIn PDF document text
    • https://almondzwealth.com/administrator/imagetemp/file/38130361756.pdfIn PDF document text
    • https://zd-zeta.com/uploads/files/202109052159124130.pdfIn PDF document text
    • http://thefutureofgolf.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1607ee5f79d8aa---94960951332.pdfIn PDF document text
    • http://burragebrothers.net/demo/jolie/beta/userfiles/files/nusaregerozilelixona.pdfIn PDF document text
    • http://vngo-cc.vn/cooker/public/files/bafarewefuvu.pdfIn PDF document text
    • http://ctyrkolky-gamax.cz/data/dokumenty/35135105872.pdfIn PDF document text
    • https://parquesanalbertohurtado.cl/ckfinder/userfiles/files/jatemibexumonakujame.pdfIn PDF document text
    • https://www.hit-education.com/wp-content/plugins/super-forms/uploads/php/files/4isqcosjop1spv9ajnl4q3f2nt/95966320450.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160824c22a2af6---vakadixumaleratabilo.pdfIn PDF document text
    • http://for-rent-aalst.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c5e4d6f1e0---purewanoxerogisatedapa.pdfIn PDF document text
    • http://www.majoriscambio.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160bc94755055f---85878538087.pdfIn PDF document text
    • https://tkpmission.org/wp-content/plugins/formcraft/file-upload/server/content/files/160bbd3a170cc1---vawixa.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ce66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE66 16444 bytes
SHA-256: 370f5bc791a158868d19cbdfcb54a0f49cd6d17f9055734ce21c079bacecede5
font_01_sfnt_off0000f922.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF922 10992 bytes
SHA-256: b782d9812b82db4b8cf7b88bd15c367f67c3735adcf07bb652ac527cb2df2b42
font_02_sfnt_off00011265.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11265 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off00012a72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A72 1804 bytes
SHA-256: 40ce09ec31e5c9a3fb5e0f5b15172400635f0acd87b1afeadc5119a6a0df2b9c

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