Malicious PDF — malware analysis report

Static analysis result for SHA-256 08466fd09f5d304d…

MALICIOUS

PDF

77.6 KB Created: 2021-06-14 14:02:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 4dea80a603e7f00dc5a10747185741c4 SHA-1: 2b84f37937912af84f1c443dfc2ba387225556d2 SHA-256: 08466fd09f5d304de0afb2907997338c5b0d1558954349984f47eaa9c481dd9b
96 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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://inwebjor.ru/uplcv?utm_term=mera+bola+h+bandari PDF link annotation
    • https://www.enterpriselighting.com/wp-content/plugins/super-forms/uploads/php/files/0275faedf96d87f7bf8d7edb769e210f/97536540206.pdfIn PDF document text
    • http://digimaap.com/wp-content/plugins/super-forms/uploads/php/files/b1hj2r5tbfg32pmge24elu1a6d/bebunemopuxogisasuteniwud.pdfIn PDF document text
    • https://angkoronetour.com/userfiles/file/45521124258.pdfIn PDF document text
    • http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16087144d472bf---30218870820.pdfIn PDF document text
    • http://sewakendragroup.com/userfiles/file/9114641050.pdfIn PDF document text
    • http://www.gunyagder.org.tr/wp-content/plugins/super-forms/uploads/php/files/gkf18nr168fpjv8jddnu3vrul4/25514868201.pdfIn PDF document text
    • http://www.louthadventures.ie/wp-content/plugins/formcraft/file-upload/server/content/files/1607b98f93fee1---tikojexovokolamifugoxaj.pdfIn PDF document text
    • https://gannat-ltd.com/userfiles/file/14511849451.pdfIn PDF document text
    • http://driscollandgibson.com/images/edit_images/file/58753755576.pdfIn PDF document text
    • http://eurogeographyjournal.eu/admin/fckfiles/file/zonopina.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/1607268e36fc98---ritojabiverot.pdfIn PDF document text
    • https://vernadoc.com/wp-content/plugins/super-forms/uploads/php/files/2f2f9cc37a32527edf89bd66709e7997/palelobasolaletivogabov.pdfIn PDF document text
    • https://www.gml.de/wp-content/plugins/formcraft/file-upload/server/content/files/160883b5c70a69---pedegatefiketapomifeso.pdfIn PDF document text
    • https://dongytueduc.com/wp-content/plugins/super-forms/uploads/php/files/lf0hmlom2k9qh9g8soc334sdto/kowazex.pdfIn PDF document text
    • https://newat.ru/wp-content/plugins/super-forms/uploads/php/files/b2624cb9895f0846f843ca1697bc0aad/gilaviwagob.pdfIn PDF document text
    • http://inspirationallabels.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16083b507c0ed5---worupolapa.pdfIn PDF document text
    • https://criteriacambio.com.br/wp-content/plugins/super-forms/uploads/php/files/o9jle12djn0k0p8oem5eitcm4s/dajozutinudubivaditaziv.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e6af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6AF 4880 bytes
SHA-256: 97b7f59307d0ffe2afb7307419fa91b2a56a427efc9e7cb6a5b8fdde1c63fc7e
font_01_sfnt_off0000f73b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF73B 11064 bytes
SHA-256: ae612471563b517bfa82e930e53022c910eeb947585a87b36b0ef7c8948246a4
font_02_sfnt_off00011d4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D4E 3420 bytes
SHA-256: 6e0026302f0b21a9076b1f9013c77a13a47f5fcac052dd0ef35bcea1774cfec6