Malicious PDF — malware analysis report

Static analysis result for SHA-256 b26f567a0494772a…

MALICIOUS

PDF

86.0 KB Created: 2021-07-03 05:24:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 9a20e4de88d37a8ae8e26eab66a986bf SHA-1: 53ee412c8e6541c25ea535cec8ccc17bb888f41c SHA-256: b26f567a0494772a19099282ee0606cbb73261dab7bf72e8e82392ae72fb392e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised WordPress sites, indicating a phishing or redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to lure users to malicious content or download further payloads. No scripts were extracted, but the PDF structure and embedded URLs are indicative of a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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://maydongy.com/wp-content/plugins/super-forms/uploads/php/files/3ol60f3h9s9kga65uethqiqsbo/dezesiwazodasirafekagaluf.pdf
    • http://tfforming.ru/d/files/lesanezubogapav.pdf
    • http://dchs1961.com/clients/871949/File/fepomimepixexunu.pdf
    • https://www.entornopublicitario.com/wp-content/plugins/super-forms/uploads/php/files/8f1d3acfece332d2ad5f0aa2f7e85e7e/vozegonaraj.pdf
    • https://davaocarrental.com/images/file/14854548964.pdf
    • http://evolutionchonburi.com/userfiles/files/pavedosomuvonaj.pdf
    • https://www.chartsunlimited.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/160b7bf794e0f0---vumugaxavuzazedotunolusaz.pdf
    • http://www.contectrade.hu/fckfiles/file/kilexezelabow.pdf
    • http://solmoda.it/userfiles/files/mamobojikekilujakotew.pdf
    • https://ifacemount.com/wp-content/plugins/super-forms/uploads/php/files/2en45ds6eq73v54986tcmnntb6/sukutamuvesumodub.pdf
    • https://www.histoiresdegroupes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160758297cc202---23337935650.pdf
    • https://www.picmephotoboothhire.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607cab48af1d0---55949273115.pdf
    • http://www.scmphotography.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609df6753af46---kenamexoraf.pdf
    • http://www.redactordecontenidos.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1608db92a02896---56835225673.pdf
    • http://chagatea.ru/wp-content/plugins/super-forms/uploads/php/files/c99725f10c68b8d76f5356b74f2dcd4a/lusan.pdf
    • http://mfplus.ba/wp-content/plugins/formcraft/file-upload/server/content/files/16070af6c44283---97141030065.pdf
    • https://www.harasportcenter.com/wp-content/plugins/super-forms/uploads/php/files/fbr6bqosgi3rjjro38trrvv29s/4705573998.pdf
    • https://dongytueduc.com/wp-content/plugins/super-forms/uploads/php/files/hg2id9o83h0q36vd9fifl0ek48/muginomog.pdf
    • http://kamkmori.cz/ckfinder/userfiles/files/42183790537.pdf
    • http://www.reroofingbrisbaneqld.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609ead68b0e46---wemigudosod.pdf
    • https://barcelonacentremedic.cat/files/galeria/files/26194607675.pdf
    • http://pvsystexperts.com/wp-content/plugins/super-forms/uploads/php/files/r1p9t2k0qi7nsdnlfafrlb7o07/nimowibelevi.pdf
    • http://www.canadiantreasurer.com/wp-content/plugins/formcraft/file-upload/server/content/files/160767e2470363---sezozu.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=hot+toddy+with+brandy+for+cold
    • 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_off0000ed1a.bin
d27dd160f1f7c957f61e7306ce0dc950c21222eef2ff813a421885aafdaca0bc
pdf-font-stream PDF embedded font (sfnt) at offset 0xED1A 10604 bytes
font_01_sfnt_off00010538.bin
c7232847b89d8b7ca36227f64fb4c007fe1fd111516c28b1b881cdc5e2a64973
pdf-font-stream PDF embedded font (sfnt) at offset 0x10538 17528 bytes
font_02_sfnt_off000132fb.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x132FB 16792 bytes