Malicious PDF — malware analysis report

Static analysis result for SHA-256 75047fbf7ab8ff11…

MALICIOUS

PDF

86.6 KB Created: 2021-06-27 23:15:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: a8b4e87de097ba5cbf4825a2fc696c95 SHA-1: 302e605396a2d3a1c85f2b715f25b7db1d7420b6 SHA-256: 75047fbf7ab8ff118ea1dbf0fdab06358541a65947102a0fc867e73ec21b4923
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to compromised websites and disposable hosting, indicative of a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and link farm behavior are common in phishing and malware delivery campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://botosani.ro/img/uploads/file/9085638497.pdf
    • http://grupomarsamo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160767977665e4---4531550384.pdf
    • https://mfdesign.hu/files/file/sejezujubitozubirabaxab.pdf
    • http://jiuxingchaoshi.com/uploads/file/090250455203.pdf
    • http://training-solutions.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160999eca9ab73---figitekukavotegowosaka.pdf
    • http://aiswaryamatrimonials.com/fck_uploads/file/20342820491.pdf
    • http://becro-plast.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160ad007432c5e---parufomugoroku.pdf
    • https://stagerightstaging.com/wp-content/plugins/super-forms/uploads/php/files/46254d9ddc0cfbdd81a462fd6cd2bdba/reviwisefonoxutekifefoti.pdf
    • https://vivaldiroberto.com/img/files/mediafiles/file/fopirurogutedofojube.pdf
    • https://nowackleverkusen.de/wp-content/plugins/formcraft/file-upload/server/content/files/16090d16a2b4d8---38193227256.pdf
    • http://cngwalk.com/fckeditor/userfiles/image/jenumi.pdf
    • https://www.booster-p.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079f2b6982be---jasonokinubevoguluwujan.pdf
    • https://jiptv.nl/wp-content/plugins/super-forms/uploads/php/files/343st5uf4lm1ltrcabu2tm8cpv/metubakidupatet.pdf
    • https://deewo.de/wp-content/plugins/formcraft/file-upload/server/content/files/160d6fed340477---6989424874.pdf
    • http://www.insurancedirectcanada.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160761535b27fa---joniwebebiwifuvizelo.pdf
    • http://parkhighclassof60.com/clients/871169/File/sirovubopujebulef.pdf
    • https://kalatranslation.co.uk/wp-content/plugins/super-forms/uploads/php/files/lua79itsm5630u9ngm53rh4vie/98298392610.pdf
    • https://www.sussexweddingservices.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160926c35f3adb---6387343490.pdf
    • https://www.tai.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160c9f8f921c7e---56100090916.pdf
    • https://www.waterlooarmsnewforest.co.uk/wp-content/plugins/super-forms/uploads/php/files/ac92f17d13471e3806c810e6e535d160/tirulufuxiwew.pdf
    • http://kondicionery-vidnoe.ru/upload_picture/file/89627502711.pdf
    • http://enotecagaribaldi.it/userfiles/files/vapagagogivurixer.pdf
    • https://deconkhoemanh.com/wp-content/plugins/super-forms/uploads/php/files/5j3lpharu8rqsci521sq3shve7/vobutofamojemimagemumi.pdf
    • https://www.eoluk.com/wp-content/plugins/super-forms/uploads/php/files/o0tb8dtsboe1gh9n63dfgo8ocu/gizidokur.pdf
    • https://travelselection.us/wp-content/plugins/formcraft/file-upload/server/content/files/160b6dd1bbd27b---40905248986.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=where+is+people%27s+court+filmed
    • 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_off0000f07d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF07D 16792 bytes
font_01_sfnt_off00010894.bin
62bd666464f5a7022becc8d401f7eb9dbeb0ad46138b293b97377d8bb54de74b
pdf-font-stream PDF embedded font (sfnt) at offset 0x10894 10748 bytes
font_02_sfnt_off0001215b.bin
b06a456fd3f7914e13e99d1a7dec51365170367fac4d15e74296bc8e466beb92
pdf-font-stream PDF embedded font (sfnt) at offset 0x1215B 16820 bytes