Malicious PDF — malware analysis report

Static analysis result for SHA-256 789ad4ce405636da…

MALICIOUS

PDF

88.7 KB Created: 2021-07-21 11:57:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: 4d2574ece585d7bc6066e5c77ad3d944 SHA-1: 1d1b3798c35b0174c765bfef44a695ffdd3dbbf6 SHA-256: 789ad4ce405636daa69dceddc86c9bffad0743f9d6138dd25cffc59d23614112
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to compromised websites, indicating a link farm designed to redirect users to malicious content. Heuristics suggest it's a phishing or malware distribution lure, with ClamAV identifying it as a 'Pdf.Phishing.Trojan'. No scripts were extracted, but the structure and URL patterns are consistent with phishing campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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://muachungbaohiem.com/uploads/userfiles/file/tumakudawivedopevagutus.pdf In PDF document text
    • https://foodphotoshop.com/userfiles/files/mopanopuwisesowirowojoma.pdfIn PDF document text
    • http://doremimarlikinsaat.com/userfiles/file/puxavo.pdfIn PDF document text
    • https://kermanrooz.com/img/files/83964465019.pdfIn PDF document text
    • https://brokenspoke.com/wp-content/plugins/super-forms/uploads/php/files/e50d4d8511983d17f6b3fe814d867cdc/gosutiponumojugego.pdfIn PDF document text
    • https://completecollegestrategies.com/wp-content/plugins/super-forms/uploads/php/files/4acb6b417c7c03e1043f0bc1cfb1b86c/mozilebofe.pdfIn PDF document text
    • https://kvartira-zalog.ru/wp-content/plugins/super-forms/uploads/php/files/1d2a537686a42a1154c8d4af9b6ef875/xobeni.pdfIn PDF document text
    • http://wamer.org/userfiles/file/83612743179.pdfIn PDF document text
    • http://www.goldenlantern.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160814e9d2bb9f---gupagazagezosize.pdfIn PDF document text
    • http://cukiernia-waltar.pl/qcms/userfiles/file/tuvejila.pdfIn PDF document text
    • https://www.sussexweddingservices.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609bf9c573863---94208178137.pdfIn PDF document text
    • https://areicon.com/images/file/pipemumamija.pdfIn PDF document text
    • https://sipare.com.ar/wp-content/plugins/super-forms/uploads/php/files/66hq3kgvfbocmqejafr7k0pjmv/71207639268.pdfIn PDF document text
    • https://nada70.org/userfiles/file/60179147199.pdfIn PDF document text
    • https://cafesca.com/ckfinder/userfiles/files/23572011722.pdfIn PDF document text
    • https://avenue102.com/uploads/file/71748170984.pdfIn PDF document text
    • http://apvn.info/userfiles/file/sidinuzamizezepizinateno.pdfIn PDF document text
    • https://thuaphatlaihoanghuy.com/uploads/files/kidujumiwevot.pdfIn PDF document text
    • https://monographie.com/ckfinder/userfiles/files/buvoko.pdfIn PDF document text
    • https://koffiewarenhuis.nl/app/webroot/files/userfiles/files/xoligagozezofo.pdfIn PDF document text
    • http://lubrifianti-auto.ro/files/file/31668002490.pdfIn PDF document text
    • http://apvn.info/userfiles/file/88627610571.pdfIn PDF document text
    • https://www.ikedatosou.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afc1f60ab31---gevumedezurove.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=from+good+to+great+to+unstoppable+pdfPDF 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_off0000f534.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF534 10968 bytes
SHA-256: 3a131a60b26ee1496c68dcd0012c4e724d316ba7d863deda3cbb5f84dc19a75c
font_01_sfnt_off00010e32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E32 18016 bytes
SHA-256: 2c75e76e2ec70421f8926040af6706a96e6fecd829c38e86510fe75dc6c7a617
font_02_sfnt_off00013d44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D44 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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