Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9eb6f63da96095f…

MALICIOUS

PDF

87.7 KB Created: 2021-06-27 11:22:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d28d2f88ee1bb942972e6af2ef3c516c SHA-1: 704d914049121b22a67b1a5125f62dd8cb230a09 SHA-256: e9eb6f63da96095f73ad40c61ffc65a2ddb33ca8ec924e8ab7511ef2672f572b
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. It functions as a link farm, containing numerous URLs that point to external websites. Some of these URLs are hosted on compromised WordPress sites, suggesting an attempt to distribute phishing content or malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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://chcial.ru/uplcv?utm_term=chiral+compound+meaning
    • http://agcslohian.com/userfiles/file/megenogibiju.pdf
    • https://gresathouse.com/wp-content/plugins/super-forms/uploads/php/files/b9b702b3c5aa23b72e8559533882f983/61093338214.pdf
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/27827f81635d1ed37764cd513bf15445/vefakelabiwogimoxazabav.pdf
    • http://polskienarty.pl/data/aktualnosci_imgs/file/gixoruwavunitazo.pdf
    • https://blokhol.com/upload/files/43334930694.pdf
    • https://pankalconstructora.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609305b28bf70---nolufiliwogusizadif.pdf
    • https://robinio.de/wp-content/plugins/super-forms/uploads/php/files/ub3fqnf01ovsjmapc09u9f937j/75051268357.pdf
    • https://armagedonspedycja.pl/files/file/pogiluvipufoke.pdf
    • http://penoplex24.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1606e5ae5dd96b---romuge.pdf
    • https://bodwellassociates.com/wp-content/plugins/super-forms/uploads/php/files/e4b911c9d999f73eb709af791ffcd2ee/39643099518.pdf
    • http://bmsorganica.com/userfiles/file/mafozijakobabago.pdf
    • https://pikewallis.no/wp-content/plugins/formcraft/file-upload/server/content/files/160707d26cbb96---57701071797.pdf
    • https://laneopx.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607522d74c6a1---37913124799.pdf
    • https://www.asahinadigital.com/wp-content/plugins/super-forms/uploads/php/files/bblmqh2nab0qfd1bn5nd7m5aoi/wozutipususebu.pdf
    • https://www.alertgy.com/wp-content/plugins/super-forms/uploads/php/files/9daf11c02ab1c63d8c065da83a5ef7bb/kuwisupabufituri.pdf
    • http://www.melodypods.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071e70e4c94d---putax.pdf
    • https://ccveg.org/wp-content/plugins/super-forms/uploads/php/files/5m97g25e997i6vq403v2oblqmc/17578414178.pdf
    • https://coloreverything.love/wp-content/plugins/super-forms/uploads/php/files/0a1071468487e398b2e9b31021570b1f/kinasotumomum.pdf
    • http://burchiellati.com/file_fck/file/58418520673.pdf
    • https://hoovermaids.com/wp-content/plugins/super-forms/uploads/php/files/f1bf48b9ea27d733c29e8e557e9e7fdb/lonexodenidax.pdf
    • https://www.ikedatosou.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5ebf83f406---8844114702.pdf
    • https://xn--80aaa1anac6cg.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/c49d32a6fceebc34fcad67de414414de/kizifajipufigoxuz.pdf
    • 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_off0000f555.bin
d9d648acf072965ab889e70ec53a3c54607b947bcac2ea2c4d14ae9e8d6bb5b4
pdf-font-stream PDF embedded font (sfnt) at offset 0xF555 16716 bytes
font_01_sfnt_off00012114.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12114 16792 bytes
font_02_sfnt_off0001392b.bin
7f52c72f2fd69e62cf1bc16aee5d55a36bf674e3a8941b89d5db143b1f9cd1a1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1392B 10824 bytes