Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a3254069885ce17…

MALICIOUS

PDF

79.6 KB Created: 2021-06-27 08:34:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ebe504bb1778e00b0d5132203b29dd13 SHA-1: 27bf3c4aee4679ba998b9acd3f1addd0211656fe SHA-256: 5a3254069885ce174c2d318c3eae0b3bf606ce62f7dbdf2aab46545dc158f9bf
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous links pointing to compromised WordPress upload storage and other disposable hosting, suggesting a link farm designed to redirect users to malicious content. The PDF structure and embedded links indicate it's likely part of a phishing campaign or a distribution vector for further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://rybczewice.pl/userfiles/file/47835372654.pdf
    • https://www.ikedatosou.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d79c1275001---62623303218.pdf
    • https://louvre.lv/res/wysiwyg/file/muwulojazale.pdf
    • https://www.okcfarmersmarket.com/wp-content/plugins/super-forms/uploads/php/files/550d4776fed1f16ecaa62191deb7bd1b/pinutujulosofukurun.pdf
    • http://digitalpolicycouncil.com/imagenes/file/53602029921.pdf
    • https://www.capitalroofingct.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c61c077e36e---44087585437.pdf
    • https://www.taxikladis.gr/wp-content/plugins/formcraft/file-upload/server/content/files/16078d719076b6---66549593538.pdf
    • https://scriptdd.com/_file/file/72326730779.pdf
    • http://orosweb.hu/ckfinder/userfiles/files/mumikekazajorudoro.pdf
    • https://3dreamstudios.com/wp-content/plugins/super-forms/uploads/php/files/aaef852a50d59b738ba6b29656433413/gelodixozetedesazezazusek.pdf
    • http://pocatellocampfire.com/wp-content/plugins/super-forms/uploads/php/files/s2nm6f070jhefggaea8q1aid75/89951693095.pdf
    • http://erkerlaender.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608cff537e536---30850012698.pdf
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/797no9oq9hhgrid8emkk5o8moc/69251483176.pdf
    • https://www.picmephotoboothhire.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16079a83a84419---73596418249.pdf
    • https://theatresaucinema.fr/uploads/file/tipomudirujakezujepes.pdf
    • http://foire-fromages-et-vins.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608523901dbb2---61494745265.pdf
    • https://carthink.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608850e750302---13210268214.pdf
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/80ecfcc07553876823bad1e5a41b8e7b/maxikifu.pdf
    • http://phuongdonggolf.vn/app/webroot/uploads/files/dotukuvatifarafoxuzo.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099f3cd80e03---sosirebaramepezepoz.pdf
    • http://airconbank.com/upload/fckeditor/file/27982873789.pdf
    • https://www.expoagrogto.com/wp-content/plugins/super-forms/uploads/php/files/sp1rqir0f1cetj3ob9vh1hj825/51425821538.pdf
    • https://www.advids.io/wp-content/plugins/formcraft/file-upload/server/content/files/1609661618dc15---76110616980.pdf
    • http://mictrogiang.com/userfiles/files/3417772967.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=mind+map+template+powerpoint
    • 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_off0000d42f.bin
5a20208c74387860a7edccba62d903922682606fdb6cf0662a63dc7aa14ef74f
pdf-font-stream PDF embedded font (sfnt) at offset 0xD42F 10464 bytes
font_01_sfnt_off0000ebe1.bin
efc8392f068796f590e31f832e44bdbeb02cf09c3d6664814118629beec9aeb4
pdf-font-stream PDF embedded font (sfnt) at offset 0xEBE1 17256 bytes
font_02_sfnt_off000118fe.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x118FE 16792 bytes