Malicious PDF — malware analysis report

Static analysis result for SHA-256 e47531011d0b8ea1…

MALICIOUS

PDF

90.3 KB Created: 2021-06-26 10:57:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ad713a492d1d71caf531cd699cd9b84c SHA-1: ab240d1c54a30d7284ba0c5631dbe501d404babb SHA-256: e47531011d0b8ea10ca6b14d9371ad91dfd32930daa434f65ac123c144091d5e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to potentially compromised WordPress sites and disposable hosting, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of an attempt to exploit users via malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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://bechtoldpaving.com/wp-content/plugins/super-forms/uploads/php/files/0d3b17d872cd2bcdf4a73270f3d68b14/70383106722.pdf
    • https://buddingheights.org/wp-content/plugins/formcraft/file-upload/server/content/files/160ae24846c47f---mobagereviganurowogofot.pdf
    • https://nothingbutsafetyglasses.com/userfiles/file/jotikirefozulokisudotek.pdf
    • http://botosani.ro/img/uploads/file/bewawigagepujowatudikibam.pdf
    • http://keysrotary.com/clients/d/da/da683cbc30bfd632b0b364d14bdd38fd/File/65582444524.pdf
    • http://www.jhannahs.com/wp-content/plugins/formcraft/file-upload/server/content/files/160871d70cb4e4---50040715453.pdf
    • https://wilsonbarrera.com/inicio/wp-content/plugins/formcraft/file-upload/server/content/files/16088629891c8b---zadilopikotagob.pdf
    • http://abwingssuffolk1.com/uploads/files/6240982547.pdf
    • https://hotelristorantenovecento.it/wp-content/plugins/super-forms/uploads/php/files/f11e05895782e0811442fb973e5312b5/28577373510.pdf
    • http://hornets88.com/clients/56662/File/49757100450.pdf
    • https://solarconsulting.org/wp-content/plugins/super-forms/uploads/php/files/840d4109bedd4e2f8a51c98479697481/kevofefamibola.pdf
    • http://seigyobannkaigaikikaku.com/ckfinder/userfiles/files/72079832712.pdf
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609a9a90a6b0b---jevivogotejabozi.pdf
    • https://xn--78-6kce7dfhb9dwb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/e7f6831c88cb77700394f73fdcd36bb2/44168212766.pdf
    • https://inchirieriavioane.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16076628b4dec2---sigetitonufuvebaxanit.pdf
    • http://alexanderjamesbackcatalogue.com/userfiles/file/26356975016.pdf
    • http://workprohealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082736ee57ae---nufolijuvexigepuvivu.pdf
    • https://voolabs.com/wp-content/plugins/formcraft/file-upload/server/content/files/160930436e3de3---gifafivomakupuza.pdf
    • http://mirrorgallery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4319add7d6---fanegakepodogidiwu.pdf
    • https://fwullong.com/upfiles/editor/files/5291167599.pdf
    • http://www.skupp.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16092abefbc6c7---nepawalimakojusifalava.pdf
    • http://www.jobsincrete.gr/images/_user_na/file/bomiwujujabezabevejav.pdf
    • https://cspdental.com/wp-content/plugins/super-forms/uploads/php/files/8cf1bd6e3792a056358550561433e6e2/wozubisudamurazereme.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=parts+of+the+body+in+french+pdf
    • 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_off0000ff69.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xFF69 16792 bytes
font_01_sfnt_off0001177b.bin
4ba89471b0f01f2aa7b7ccf95743d5964fa4e8657a91c8187e118252c4982687
pdf-font-stream PDF embedded font (sfnt) at offset 0x1177B 16700 bytes
font_02_sfnt_off000142f6.bin
c670f148c7fe913d4061da1f4868bbb125a01e9e65b1193ff44bc9496626197e
pdf-font-stream PDF embedded font (sfnt) at offset 0x142F6 10928 bytes