Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0b328d517f90b97…

MALICIOUS

PDF

72.2 KB Created: 2021-09-04 00:49:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 521e72948d28f538d66e2084bcf0e68b SHA-1: dbb7cb9070e3431672a163a5b11c22f6fd7bdffe SHA-256: f0b328d517f90b974d5282a0969fcc2790a61f4d1f1d8ca5da00970ed65a9e24
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics and ClamAV as malicious, specifically as a phishing or trojan delivery mechanism. It contains numerous links pointing to potentially compromised websites and disposable hosting, suggesting an attempt to redirect users to malicious content. The ML classifier also strongly indicated maliciousness, supporting the conclusion that this file is part of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://irinka.org/ckfinder/userfiles/files/97731510896.pdf In PDF document text
    • https://www.chesapeake-lighting.com/wp-content/plugins/super-forms/uploads/php/files/ed1b695969392c884553b864f959be24/48215379665.pdfIn PDF document text
    • http://chiangmai-clean.com/user_img/files/josoroxedepizolag.pdfIn PDF document text
    • https://ewms.vn/wp-content/plugins/super-forms/uploads/php/files/f791if0gnkmm8dhiq2jchibvi2/63549068026.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b405c3a99fa.pdfIn PDF document text
    • http://www.victorian-manor.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160df0e866bd61---81699911366.pdfIn PDF document text
    • https://eitmedu.in/ckfinder/userfiles/files/kewidekokalavapaterukug.pdfIn PDF document text
    • http://shuimotongyuan.com/userfiles/file/47577800399.pdfIn PDF document text
    • http://gchs1969.com/clients/867877/File/24104771723.pdfIn PDF document text
    • http://makesomenoise.hu/upload/file/nobezexurijode.pdfIn PDF document text
    • https://dondepodemosir.com/userfiles/file/95919880778.pdfIn PDF document text
    • https://melz-feu.ru/upload/waxugaluzepubibe.pdfIn PDF document text
    • https://www.sanier.pl/wp-content/plugins/super-forms/uploads/php/files/i4d1cirfgjt3afr66lijhn2aui/39645134777.pdfIn PDF document text
    • https://stefandes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160859c536b33d---98587046661.pdfIn PDF document text
    • https://angkorphotographyguide.com/userfiles/file/mexarugutezagetemol.pdfIn PDF document text
    • https://sip7.pl/autoinstalator/sip7.online/wp-content/plugins/super-forms/uploads/php/files/5f26dddf6267dbbb5962d88da81c5577/6234529207.pdfIn PDF document text
    • http://ohsongpharm.com/ckfinder/userfiles/files/50524115709.pdfIn PDF document text
    • http://www.specemc.ru/upload/files/fufudavopigewumag.pdfIn PDF document text
    • https://www.medipratik.com/wp-content/plugins/formcraft/file-upload/server/content/files/16102fb8168e8f---45653974430.pdfIn PDF document text
    • https://vatlieutaphu.com/upload/files/redufigusarewef.pdfIn PDF document text
    • https://gastriklandsbf.se/UserFiles/files/74652008277.pdfIn PDF document text
    • http://gptools.net/userfiles/file/koduwabowerulagolewopapep.pdfIn PDF document text
    • https://www.aukuras.org/ckfinder/userfiles/files/61397845034.pdfIn PDF document text
    • http://theffirm.com/userfiles/file/xagedetojuxikufifa.pdfIn PDF document text
    • https://dispomydeal.com/wp-content/plugins/super-forms/uploads/php/files/a0317af4d4edaa737381702337652ece/limebenufiminenogeberapag.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=the+five+pillars+of+islam+worksheetPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bb00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBB00 15456 bytes
SHA-256: ed12099f07554aa7c76c9cec2d9dfdf46af3cecac42074e02957e6ad28446b4e
font_01_sfnt_off0000e283.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE283 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000fa9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA9A 10728 bytes
SHA-256: 02721954623152f1fce621cedf0625724d0081195f0575c93da1e72519f5b290

Open this report in the interactive analyzer, or submit your own file for analysis.