Malicious PDF — malware analysis report

Static analysis result for SHA-256 450571f4baaacd26…

MALICIOUS

PDF

99.1 KB Created: 2021-06-30 08:29:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 75866757b0a45d9fabebebccf135d06d SHA-1: 0c814fd5d5a31870b3c88e1a66321d2690e8ee98 SHA-256: 450571f4baaacd2664abd0340bcd70e40e58df0677c26e2ea668cbd309372694
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable domains, indicating a link farm designed to lure users to potentially malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9862

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 http://big-blue-bus.com/pics/fotos/1/file/gemojebapibimavoxibewuwi.pdf In PDF document text
    • http://www.ebsjosepirosamaria.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9782dac624---taravilezuratekasadevu.pdfIn PDF document text
    • https://idfusionllc.com/wp-content/plugins/super-forms/uploads/php/files/1537881914a987077b419cff7ff901b5/xaxuk.pdfIn PDF document text
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/965dc8e4mac6sls0s161dgq7gv/sutomidejelufowasog.pdfIn PDF document text
    • http://hopkinshigh1961.com/clients/878968/File/99396688050.pdfIn PDF document text
    • https://legacydockandmarine.com/wp-content/plugins/super-forms/uploads/php/files/c162e5f04567b28a9ff18bdf3de959f1/xevogowoteruvoxemubulu.pdfIn PDF document text
    • http://trans-serwis.com/userfiles/file/bivedazovit.pdfIn PDF document text
    • http://phanphoiongnhuahoasen.vn/upload/files/23991870570.pdfIn PDF document text
    • https://vallejardin.com/wp-content/plugins/super-forms/uploads/php/files/dae95a124a1c74e1570b001616bface5/konozomoxe.pdfIn PDF document text
    • https://davaocarrental.com/images/file/totopilizi.pdfIn PDF document text
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/4a8k1j5and6r0ic9ir5na8uqg5/rojazu.pdfIn PDF document text
    • https://www.numberoneporthill.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607a61007914e---22727124640.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/160863e73ac02b---38611189284.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c7b286f0f98---75476656904.pdfIn PDF document text
    • http://ecbpolska.pl/wp-content/plugins/super-forms/uploads/php/files/c7f8377603e8fe821ae08fce3b344738/74437584927.pdfIn PDF document text
    • https://getlovebooks.com/wp-content/plugins/super-forms/uploads/php/files/c52a9055dc561af873cec412c9892c6f/giwisevoronenokefuguxo.pdfIn PDF document text
    • http://www.platformliften.info/wp-content/plugins/formcraft/file-upload/server/content/files/160ab0e2f3178f---31897434640.pdfIn PDF document text
    • https://inchiriereelicoptere.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16079dec287807---puvolosukikukuzik.pdfIn PDF document text
    • https://audreyheselmans.com/_files/file/denamolulusamaw.pdfIn PDF document text
    • http://svs-pm.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608cfcb9f2112---xojofosiziledebiluz.pdfIn PDF document text
    • https://msr-hudsonproperties.com/wp-content/plugins/super-forms/uploads/php/files/288c8c40e8554f3084001db70b40be18/8826113634.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=to+be+inquisitivePDF link annotation
    • 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off00014c24.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x14C24 19568 bytes
SHA-256: 1d0d0e3da7df68403398d72b98fe1cd246cf9c4aba2afc044919577314127a58
font_00_sfnt_off0000d62d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD62D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ee3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE3F 31436 bytes
SHA-256: 7331d74cc5725fb3dc555b8c7058f2799c6882fba5c833a4c89a0456128cd794
font_02_sfnt_off00013512.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13512 10208 bytes
SHA-256: 913afa3d3e8fbe651c25f3dd68d724616a36ec4aff3da4a173193efc03d082ed
font_04_sfnt_off00016d5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16D5A 4140 bytes
SHA-256: f8167df877b825837955a3ddcb5be9e86d48094a22acc760f0ac44f6443de2b0

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