Malicious PDF — malware analysis report

Static analysis result for SHA-256 01a47506ad59bfa9…

MALICIOUS

PDF

82.3 KB Created: 2021-08-18 02:02:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: ddbf95de8de2d84aaffdc01ce4b0c3b5 SHA-1: 2952020f37ef07dc7bfd4bc5cc879c953e24248a SHA-256: 01a47506ad59bfa91c85730e7baa974e54e16dd904103ce860e0560d53c0fdf1
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. Several heuristics point to the PDF acting as a link farm, directing users to compromised WordPress upload storage. These links likely serve as a lure for phishing or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://izharfoster.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a655d31056d---negizojodakupemuboku.pdf In PDF document text
    • https://www.tessilgiada.it/wp-content/plugins/formcraft/file-upload/server/content/files/16077e50b4d277---gopulo.pdfIn PDF document text
    • http://mediaworld.pro/ckfinder/userfiles/files/35272372309.pdfIn PDF document text
    • https://karapinarinsaat.net/userfiles/upload/file/bifidedevezibipabikoxedom.pdfIn PDF document text
    • https://xn----8sbaavnccwq4am.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/228bf7e35a4603764a76f5829eeef88c/tapobejofenexig.pdfIn PDF document text
    • http://www.electricman.in/demo/frontend/web/uploads/files/18273820161.pdfIn PDF document text
    • http://turnyras.lt/Files/file/50944073397.pdfIn PDF document text
    • http://maslag.eu/userfiles/file/nugifemaramulakila.pdfIn PDF document text
    • https://cairparavel.ro/app/webroot/files/userfiles/files/95786945584.pdfIn PDF document text
    • http://entone.es/wp-content/plugins/super-forms/uploads/php/files/1fee3385b3aca64cc203aa0c28d71364/jaripu.pdfIn PDF document text
    • http://www.chp.pl/ckfinder/userfiles/files/sunovefokuva.pdfIn PDF document text
    • http://ticaproduce.com/ckfinder/userfiles/files/31270777381.pdfIn PDF document text
    • https://esteticarcare.com/wp-content/plugins/super-forms/uploads/php/files/45af5fa5dfea5acdf39cea65e27e8be5/10404996050.pdfIn PDF document text
    • https://pbpkrosno.com/fckfile/97174783060.pdfIn PDF document text
    • http://thayloilocnuoctaihanoi.net/upload/files/buxekeli.pdfIn PDF document text
    • http://ednak.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b9c26521e80---62408203269.pdfIn PDF document text
    • https://moveo-sport.pl/userfiles/file/zinaropufuj.pdfIn PDF document text
    • http://ohstigers66.com/clients/d/da/da15611725e7ba20b6827cbf2e24f87d/File/vaxolivaxaze.pdfIn PDF document text
    • http://www.ponderosafestival.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c460869e395---xakum.pdfIn PDF document text
    • http://www.celso.org/download/gafoposal.pdfIn PDF document text
    • http://lichnyiybrand.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160beea45a7e74---luwifenutanopovaduwatiwo.pdfIn PDF document text
    • https://securitegenerale.tn/userfiles/file/kuxar.pdfIn PDF document text
    • http://www.holzbau-hoelzl.at/wp-content/plugins/formcraft/file-upload/server/content/files/1606f9e928123e---5721198395.pdfIn PDF document text
    • http://bright-mineral.com/uploadfile/file/2021051709502740.pdfIn PDF document text
    • http://klubalfa.org/img/userfiles/file/videnunadotexij.pdfIn PDF document text
    • http://www.scmphotography.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16094857d726f9---58780928350.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=what+is+pnp+bill+payment+on+bank+statementPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dfc3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFC3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f7d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7D5 16520 bytes
SHA-256: f3d0f37e3abe9102a529a8edd51c4553ba72e46ffad06ca9e18f783487e9843e
font_02_sfnt_off00012298.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12298 10756 bytes
SHA-256: e9f556263d162c9d800622d863fd34ff5aa3a347149f701f1e0d41e4986ffc59