Malicious PDF — malware analysis report

Static analysis result for SHA-256 94d7bf13ed38ca4d…

MALICIOUS

PDF

82.5 KB Created: 2021-08-09 09:15:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 549436cb98ace9ced2afda3891420d26 SHA-1: b8001a5db65956115cba148ff3a1e3aed6e47c10 SHA-256: 94d7bf13ed38ca4dde8a2a79083e2ced88c48dad49d85538fec7eb7924c165e5
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. It contains numerous external links, many pointing to compromised CMS uploads or disposable hosting, suggesting a link farm designed to redirect users. The ML classifier also strongly indicated maliciousness. While no scripts were explicitly extracted, the presence of external links and the overall detection profile points towards a phishing or malware distribution attempt.

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://pixomot.ru/uplcv?utm_term=how+to+program+directv+genie+remote+without+receiver PDF link annotation
    • https://vegan-eshop.cz/data/file/37878619837.pdfIn PDF document text
    • http://xn--365-pn7mwb654m2qn.com/ckupload/files/84895425491.pdfIn PDF document text
    • http://leton.pl/userfiles/file/kotutonisowimurenaje.pdfIn PDF document text
    • https://songhong-thudo.com/img/files/96772535229.pdfIn PDF document text
    • https://unosms.us/userfiles/file/9547821114.pdfIn PDF document text
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/eqv4pduccq1nuc5vgp8rhn4886/22646572377.pdfIn PDF document text
    • https://stallion-international.com/userfiles/file/29533362163.pdfIn PDF document text
    • http://ligonfamilyreunion.org/clients/9/9a/9a44987365eba454cd9b2deda39aa7c0/File/wiximirad.pdfIn PDF document text
    • https://allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/6d32148f9f95e14bdb6992f2c7d9c021/loxofabip.pdfIn PDF document text
    • http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/16083f9f315baa---21073050721.pdfIn PDF document text
    • https://micast.de/wp-content/plugins/super-forms/uploads/php/files/nmtjehjsu56ef9tkq73m49j0ua/dixipojogaxuvojarajita.pdfIn PDF document text
    • https://citytrafik.nu/images/file/36944355283.pdfIn PDF document text
    • https://tiklatakip.com/calisma2/files/uploads/3515846312.pdfIn PDF document text
    • https://www.dolphinrfid.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607555ea7f605---76627035559.pdfIn PDF document text
    • http://cuacuondaiphuc.vn/upload/files/dupatusopevepu.pdfIn PDF document text
    • http://cainghienbinhduong.com/uploads/userfiles/file/wasubeniwagozapun.pdfIn PDF document text
    • http://nowyhotelik.pl/userfiles/file/12425881937.pdfIn PDF document text
    • http://zabradli-znerezu.cz/userfiles/file/gelodupir.pdfIn PDF document text
    • https://zevkotodoseme.com/upload/ckfinder/files/sexosudife.pdfIn PDF document text
    • https://shipnhanh247.vn/asset/files/pemakivon.pdfIn PDF document text
    • http://telegid.tv/userfiles/files/19621079526.pdfIn PDF document text
    • http://southwest66reunion.com/clients/f/f6/f6f8b7bd17d60304c359e527a2c43449/File/xupaganixozuvozalimuneku.pdfIn PDF document text
    • https://theshairpodcast.com/wp-content/plugins/super-forms/uploads/php/files/17cf07a163f9a76f03bc609ad87d448b/sinapisewexi.pdfIn PDF document text
    • http://psychologyforeverybody.com/ckfinder/userfiles/files/boxenaxuvagoba.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_off0000df5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF5D 10988 bytes
SHA-256: c05203c9c64ab36781f62414395233ac411aed9ace594b8073a699e81256031d
font_01_sfnt_off0000f884.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF884 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011096.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11096 16628 bytes
SHA-256: 73ee5507b8848624ab51b6f4ba86cea50dcf31d242d0f124bb8223ec432d1bff

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