Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2033e6ab498c410…

MALICIOUS

PDF

72.7 KB Created: 2021-06-14 09:16:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: b7000a31afaa0d7357a3614a23222af0 SHA-1: 3365391abd9f2527192804be6f14f3125f7a3c8b SHA-256: f2033e6ab498c4104936db5649810214d1f0bdd95e7c4c17f26b1afe294aa511
96 Risk Score

Malware Insights

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

This PDF document exhibits characteristics of a link farm, with numerous embedded URLs pointing to potentially compromised websites or disposable hosting. The ML classifier strongly indicates malicious intent, and the presence of external URI heuristics further supports the conclusion that the document is designed to redirect users to malicious destinations. No scripts were extracted, but the overall structure and URL patterns suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://garglob.ru/uplcv?utm_term=factorio+oil+ratios PDF link annotation
    • https://www.asahinadigital.com/wp-content/plugins/super-forms/uploads/php/files/4ujq8fsvb1p2t9aslqp4f4j704/bosix.pdfIn PDF document text
    • https://mtmnetwork.net/uploadEditor/files/zimemotumijazegixozale.pdfIn PDF document text
    • http://vipavtoufa.ru/wp-content/plugins/super-forms/uploads/php/files/a938b0fe0a64fa2767af9c9f4f8da4a3/sasusakovajum.pdfIn PDF document text
    • https://orldoc.ch/wp-content/plugins/super-forms/uploads/php/files/nd76lfcb3kpc3c9q3l5nupgpi6/85534089283.pdfIn PDF document text
    • https://stcatherine.ac.ug/wp-content/plugins/formcraft/file-upload/server/content/files/1608d6074cb472---82453536398.pdfIn PDF document text
    • https://hsegroup.ru/wp-content/plugins/super-forms/uploads/php/files/v5p5j64e695qgji23co9ek7i20/27461252545.pdfIn PDF document text
    • https://asiquim.com/ckfinder/userfiles/files/dufimivesanis.pdfIn PDF document text
    • https://angkoronetour.com/userfiles/file/79175301155.pdfIn PDF document text
    • https://nationalcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f3f2605e90---12811023767.pdfIn PDF document text
    • https://discoverapartmentsforrent.com/wp-content/plugins/super-forms/uploads/php/files/cef01366812b4f1fcc48ea52ce1c0e28/23660210246.pdfIn PDF document text
    • http://novaserv.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084fcd9ce8b4---61184446281.pdfIn PDF document text
    • https://cdpu.net/wp-content/plugins/super-forms/uploads/php/files/dfb12ac2449c88efc1de4d1bb35467ad/59734195946.pdfIn PDF document text
    • https://cuisinescartier.ca/upload/editor/file/jumamurup.pdfIn PDF document text
    • http://www.iso-clean.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16088b22a26e2f---40554503446.pdfIn PDF document text
    • http://aircond.md/upload_fck/file/sisurakibonufepel.pdfIn PDF document text
    • https://www.alarisusallc.com/wp-content/plugins/super-forms/uploads/php/files/a26b691123eb966f1317b92b56ab3505/54864022548.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e28c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE28C 4748 bytes
SHA-256: 7fcc32c7bdc2d8f429d45a20b0963badf57f9a32fadb82d432d205e90ea1d9c7
font_01_sfnt_off0000f2bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2BB 10452 bytes
SHA-256: 9140340af3fc407b4943fbbbaf65cfa3d339d2d20961141c16adea93a9b1c3f9

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