Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7f3df396549aa42…

MALICIOUS

PDF

84.9 KB Created: 2021-06-26 05:27:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 60bf428bb6d8ba253ec0a762bafe2e2d SHA-1: 3b3cc940261727c560bc7f5806e2ee67b36b39ea SHA-256: f7f3df396549aa427dd62b557d199316dc675ea9edd1251443c7b8a01e48e4a1
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier. It contains numerous links, many pointing to compromised WordPress sites, suggesting a link farm designed to redirect users. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the link farm indicate a phishing or malicious content delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://monarchwinemerchants.com/wp-content/plugins/super-forms/uploads/php/files/76073833ffec6c752252086d8fb03347/jemilikidowovetutivixobo.pdf
    • http://brodart01.com/wp-content/plugins/super-forms/uploads/php/files/443329sd2n04spf5o4n290p8dm/78353767124.pdf
    • http://andreevmag.com/wp-content/plugins/super-forms/uploads/php/files/837feb5626b12addf8c3fe47f7149961/89268805118.pdf
    • http://chemonova.com/FCKeditor/file/98069614620.pdf
    • http://mebco.ru/images/file/ligezudisovisetekaxavet.pdf
    • http://ganan10.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/16084adc683b6f---toretaxuj.pdf
    • http://www.brennholz-heinlein.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609da9a9e52a0---pawumogof.pdf
    • https://www.taxikladis.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160c8b1bb37384---nefifirofeganupugemidiva.pdf
    • http://logiccpacma.com/ckfinder/userfiles/files/93897743918.pdf
    • https://jiptv.nl/wp-content/plugins/super-forms/uploads/php/files/t2ql8mtq2jl167fbe8ov59si1i/55117381634.pdf
    • https://grupahatak.pl/admin/_fck_files/file/jiresepexelidimafeko.pdf
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/160934cb7a2b1d---revenisodabis.pdf
    • https://hopefor.today/wp-content/plugins/super-forms/uploads/php/files/c05a5330c9c44416d16940535a5d64ff/titilamodemederadag.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b41b308b949---fosopixojiwodasij.pdf
    • http://stylist.in.ua/wp-content/plugins/formcraft/file-upload/server/content/files/160a14199b46b0---87809586757.pdf
    • http://digimaap.com/wp-content/plugins/super-forms/uploads/php/files/2s00sopfbpsp97lut568jhau35/tusowevujixunutobikipetuj.pdf
    • https://rclurie.com/wp-content/plugins/super-forms/uploads/php/files/651045487e3254e7d8b3f43c2235d85e/lowiwaralelijigafore.pdf
    • https://tenfci.org/userfiles/file/rojovolazamewusit.pdf
    • https://yarsan.ru/wp-content/plugins/super-forms/uploads/php/files/05e1f7269f817ac59d54d644d34f946f/bozileza.pdf
    • https://xlspandoek.nl/userfiles/file/dumujoxerufofa.pdf
    • http://decamiones.com/userfiles/file/repegu.pdf
    • http://principessavencanice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d7d9daa471---dikusupudaxigaru.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=how+to+make+charcoal+in+minecraft+xbox+360
    • 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_off0000e815.bin
0755d0514abc2daf4dde8053b8495f9dea615cb97d8562c6969c6bf1c5459eee
pdf-font-stream PDF embedded font (sfnt) at offset 0xE815 16728 bytes
font_01_sfnt_off000113a7.bin
56625f63aa6ec0a6cd6cbca480b50d33a663dc623edb75ad042130a440a6cb2b
pdf-font-stream PDF embedded font (sfnt) at offset 0x113A7 11308 bytes
font_02_sfnt_off00012e08.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12E08 16792 bytes